AVDL / Avadel Pharmaceuticals plc - SEC Dosyaları, Yıllık Rapor, Vekil Beyanı

Avadel Pharmaceuticals plc
US ˙ NasdaqGM ˙ US05337M1045
BU SEMBOL ARTIK AKTİF DEĞİL

Temel İstatistikler
LEI 549300E27PTSG2RHC762
CIK 1012477
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Avadel Pharmaceuticals plc
SEC Filings (Chronological Order)
Bu sayfa, başka bir yerde sunduğumuz mülkiyet başvuruları hariç, SEC Dosyalarının tam ve kronolojik bir listesini sunmaktadır.
February 23, 2026 15-12G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001-37977 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified

February 12, 2026 EX-3.1

Companies Act 2014 A PUBLIC COMPANY LIMITED BY SHARES AVADEL PHARMACEUTICALS PUBLIC LIMITED COMPANY Incorporated on 1 December 2015 Companies Act 2014 A PUBLIC COMPANY LIMITED BY SHARES AVADEL PHARMACEUTICALS PUBLIC LIMITED COMPANY MEMORANDUM OF ASSO

Exhibit 3.1 Companies Act 2014 A PUBLIC COMPANY LIMITED BY SHARES CONSTITUTION of AVADEL PHARMACEUTICALS PUBLIC LIMITED COMPANY Incorporated on 1 December 2015 Companies Act 2014 A PUBLIC COMPANY LIMITED BY SHARES CONSTITUTION of AVADEL PHARMACEUTICALS PUBLIC LIMITED COMPANY MEMORANDUM OF ASSOCIATION (Amended and restated by special resolution dated 20 December 2016) 1. The name of the Company is

February 12, 2026 POS AM

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 POSASR

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 POS AM

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 EX-99.1

Alkermes plc Completes Acquisition of Avadel Pharmaceuticals plc, Accelerating Entry Into Sleep Medicine Market — Augments Alkermes’ Revenue Growth Profile and Diversifies Commercial Portfolio with New High Potential Growth Product, LUMRYZ® (Sodium O

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media: Katie Joyce +1 781 249 8927 Alkermes plc Completes Acquisition of Avadel Pharmaceuticals plc, Accelerating Entry Into Sleep Medicine Market — Augments Alkermes’ Revenue Growth Profile and Diversifies Commercial Portfolio with New High Potential Growth Product, LUMRYZ® (Sodium Oxybate) for Extended-Release Oral S

February 12, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 12, 2026 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 12, 2026 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

February 12, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 POS AM

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 POS AM

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

February 12, 2026 S-8 POS

As filed with the Securities and Exchange Commission on February 12, 2026

As filed with the Securities and Exchange Commission on February 12, 2026 Registration No.

January 20, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 19, 2026 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 19, 2026 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

January 12, 2026 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2026 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2026 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

January 12, 2026 EX-99.1

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF THAT JURISDICTION.

Exhibit 99.1 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF THAT JURISDICTION. [FOR IMMEDIATE RELEASE] Avadel Pharmaceuticals Announces that Avadel Shareholders Approve the Proposed Acquisition by Alkermes DUBLIN, January 12, 2026 - Avadel Pharmaceuticals plc (Nasd

December 19, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

December 18, 2025 EX-99.1

Avadel Pharmaceuticals Announces Completion of Enrollment in Phase 3 REVITALYZ™ Trial in Idiopathic Hypersomnia - Data expected in Q2 2026 -

Exhibit 99.1 Avadel Pharmaceuticals Announces Completion of Enrollment in Phase 3 REVITALYZ™ Trial in Idiopathic Hypersomnia - Data expected in Q2 2026 - DUBLIN, December 18, 2025 – Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, announced the completion of patient enrollment in REVITALYZ, a Phase 3 trial evaluating LUMRY

December 18, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 18, 2025 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 18, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

December 9, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

December 9, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 8, 2025 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 8, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

December 3, 2025 DEFM14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defi

December 2, 2025 EX-FILING FEES

Table 1: Transaction Valuation

Calculation of Filing Fee Tables Table 1: Transaction Valuation Proposed Maximum Aggregate Value of Transaction Fee Rate Amount of Filing Fee Fees to be Paid 1 $ 279,406,901.

December 2, 2025 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defi

November 19, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2025 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

November 19, 2025 EX-2.2

AMENDMENT NO. 1 TO the TRANSACTIOn AGREEMENT

Exhibit 2.2 AMENDMENT NO. 1 TO the TRANSACTIOn AGREEMENT This Amendment No. 1, dated as of November 18, 2025 (this “Amendment”), to the TRANSACTION AGREEMENT (the “Agreement”), dated as of October 22, 2025, is entered into by and between Alkermes plc, an Irish public limited company with registered number 498284 having its registered office at Connaught House, 1 Burlington Road, Dublin 4, Ireland

November 19, 2025 EX-2.2

AMENDMENT NO. 1 TO the TRANSACTIOn AGREEMENT

Exhibit 2.2 AMENDMENT NO. 1 TO the TRANSACTIOn AGREEMENT This Amendment No. 1, dated as of November 18, 2025 (this “Amendment”), to the TRANSACTION AGREEMENT (the “Agreement”), dated as of October 22, 2025, is entered into by and between Alkermes plc, an Irish public limited company with registered number 498284 having its registered office at Connaught House, 1 Burlington Road, Dublin 4, Ireland

November 19, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

November 19, 2025 EX-99.1

Alkermes plc Announces Increased Offer to Acquire Avadel Pharmaceuticals plc

Exhibit 99.1 Alkermes plc Announces Increased Offer to Acquire Avadel Pharmaceuticals plc NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF SUCH JURISDICTION DUBLIN, November 19, 2025 — Alkermes plc (Nasdaq: ALKS) (“Alkermes”) and Avadel Pharmaceuticals plc (Nasdaq:

November 19, 2025 EX-99.1

Alkermes plc Announces Increased Offer to Acquire Avadel Pharmaceuticals plc

Exhibit 99.1 Alkermes plc Announces Increased Offer to Acquire Avadel Pharmaceuticals plc NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF SUCH JURISDICTION DUBLIN, November 19, 2025 — Alkermes plc (Nasdaq: ALKS) (“Alkermes”) and Avadel Pharmaceuticals plc (Nasdaq:

November 19, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2025 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

November 17, 2025 EX-99.1

Avadel Board of Directors Declares Lundbeck Proposal a “Company Superior Proposal” Lundbeck Proposal Values Avadel at up to $23.00 per Ordinary Share, a Total of Approximately $2.4 billion Pursuant to Alkermes Transaction Agreement, Avadel and Alkerm

Exhibit 99.1 THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) 596/2014 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF THAT JURISDICTION. THIS IS AN ANNOUNCEMENT FALLING UNDER RULE 2.4 OF THE IRISH TAKEO

November 17, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2025 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

November 17, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2025 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

November 17, 2025 EX-99.1

Avadel Board of Directors Declares Lundbeck Proposal a “Company Superior Proposal” Lundbeck Proposal Values Avadel at up to $23.00 per Ordinary Share, a Total of Approximately $2.4 billion Pursuant to Alkermes Transaction Agreement, Avadel and Alkerm

Exhibit 99.1 THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) 596/2014 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF THAT JURISDICTION. THIS IS AN ANNOUNCEMENT FALLING UNDER RULE 2.4 OF THE IRISH TAKEO

November 17, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

November 14, 2025 EX-99.1

Avadel Receives Unsolicited Proposal from Lundbeck Avadel Board of Directors Determines Proposal From Lundbeck Reasonably Expected to Result in a “Company Superior Proposal”

Exhibit 99.1 THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) 596/2014 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF THAT JURISDICTION. THIS IS AN ANNOUNCEMENT FALLING UNDER RULE 2.4 OF THE IRISH TAKEO

November 14, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2025 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

November 14, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

November 14, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2025 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

November 14, 2025 EX-99.1

Avadel Receives Unsolicited Proposal from Lundbeck Avadel Board of Directors Determines Proposal From Lundbeck Reasonably Expected to Result in a “Company Superior Proposal”

Exhibit 99.1 THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) 596/2014 NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF THAT JURISDICTION. THIS IS AN ANNOUNCEMENT FALLING UNDER RULE 2.4 OF THE IRISH TAKEO

November 13, 2025 PREM14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defi

November 13, 2025 EX-FILING FEES

Table 1: Transaction Valuation

Calculation of Filing Fee Tables Table 1: Transaction Valuation Proposed Maximum Aggregate Value of Transaction Fee Rate Amount of Filing Fee Fees to be Paid 1 $ 2,101,825,233.

November 4, 2025 EX-10.2

AMENDED AND RESTATED LICENSE AGREEMENT

CERTAIN INFORMATION CONTAINED IN THIS EXHIBIT, MARKED BY [***], HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE THE REGISTRANT HAS DETERMINED THAT IT IS BOTH NOT MATERIAL AND IS THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL.

November 4, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977

November 4, 2025 EX-10.3

SETTLEMENT AND LICENSE AGREEMENT

Exhibit 10.3 SETTLEMENT AND LICENSE AGREEMENT This SETTLEMENT AND LICENSE AGREEMENT (this “Agreement”), dated as of this 21st day of October, 2025 (the “Effective Date”), is hereby entered into by and between Jazz Pharmaceuticals, Inc. and Jazz Pharmaceuticals Ireland Limited (collectively, “Jazz”), on the one hand, and Avadel CNS Pharmaceuticals LLC and Flamel Ireland Limited (collectively, “Avad

November 4, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2025 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

November 4, 2025 EX-99.1

Avadel Pharmaceuticals Reports Third Quarter 2025 Financial Results and Provides Corporate Update – Generated LUMRYZ™ net product revenue of $77.5 million, a 55% increase compared to third quarter 2024 – – Approximately 3,400 patients on LUMRYZ as of

Exhibit 99.1 Avadel Pharmaceuticals Reports Third Quarter 2025 Financial Results and Provides Corporate Update – Generated LUMRYZ™ net product revenue of $77.5 million, a 55% increase compared to third quarter 2024 – – Approximately 3,400 patients on LUMRYZ as of September 30, 2025, a 48% increase compared to September 30, 2024 – – Announced global settlement of all litigation with Jazz Pharmaceut

October 23, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

October 22, 2025 EX-99.1

Alkermes plc Announces Agreement to Acquire Avadel Pharmaceuticals plc

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media:      Katie Joyce +1 781 249 8927 Alkermes plc Announces Agreement to Acquire Avadel Pharmaceuticals plc NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF SUCH JURISDICTION THIS AN

October 22, 2025 EX-99.1

Alkermes plc Announces Agreement to Acquire Avadel Pharmaceuticals plc

Exhibit 99.1 Alkermes Contacts: For Investors: Sandy Coombs +1 781 609 6377 For Media:      Katie Joyce +1 781 249 8927 Alkermes plc Announces Agreement to Acquire Avadel Pharmaceuticals plc NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF SUCH JURISDICTION THIS AN

October 22, 2025 EX-2.2

CONDITIONS OF THE ACQUISITION AND THE SCHEME

Exhibit 2.2 CONDITIONS OF THE ACQUISITION AND THE SCHEME The Acquisition and the Scheme will comply with the Takeover Rules and, where relevant, the rules and regulations of the Exchange Act, the Act and the Nasdaq, and are subject to the terms and conditions set out in this Announcement and to be set out in the Scheme Document. The Acquisition and the Scheme are, to the extent required by the Law

October 22, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2025 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

October 22, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 22, 2025 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 22, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

October 22, 2025 EX-99.1

Avadel Pharmaceuticals and Jazz Pharmaceuticals Reach Global Settlement

Exhibit 99.1 Avadel Pharmaceuticals and Jazz Pharmaceuticals Reach Global Settlement DUBLIN, Ireland, October 22, 2025 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, today announced the global settlement of all litigation with Jazz Pharmaceuticals Inc. (“Jazz”). Under the primary terms of the settlement agreement, Avad

October 22, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 22, 2025 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 22, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

October 22, 2025 EX-2.1

TRANSACTION AGREEMENT dated as of October 22, 2025 Alkermes plc Avadel Pharmaceuticals plc TABLE OF CONTENTS

Exhibit 2.1 [***] Indicates that certain information in this exhibit has been excluded because it is both (i) not material and (ii) is the type that the registrant customarily and actually treats as private or confidential. TRANSACTION AGREEMENT dated as of October 22, 2025 among Alkermes plc and Avadel Pharmaceuticals plc TABLE OF CONTENTS Page Article I INTERPRETATION 1 Section 1.1 Definitions 1

October 22, 2025 EX-2.1

TRANSACTION AGREEMENT dated as of October 22, 2025 Alkermes plc Avadel Pharmaceuticals plc TABLE OF CONTENTS

Exhibit 2.1 [***] Indicates that certain information in this exhibit has been excluded because it is both (i) not material and (ii) is the type that the registrant customarily and actually treats as private or confidential. TRANSACTION AGREEMENT dated as of October 22, 2025 among Alkermes plc and Avadel Pharmaceuticals plc TABLE OF CONTENTS Page Article I INTERPRETATION 1 Section 1.1 Definitions 1

October 22, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

October 22, 2025 EX-2.2

CONDITIONS OF THE ACQUISITION AND THE SCHEME

Exhibit 2.2 CONDITIONS OF THE ACQUISITION AND THE SCHEME The Acquisition and the Scheme will comply with the Takeover Rules and, where relevant, the rules and regulations of the Exchange Act, the Act and the Nasdaq, and are subject to the terms and conditions set out in this Announcement and to be set out in the Scheme Document. The Acquisition and the Scheme are, to the extent required by the Law

September 17, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 15, 2025 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 15, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

September 3, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 29, 2025 AVADEL PH

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 29, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Em

September 3, 2025 EX-99.1

Avadel Pharmaceuticals Strengthens Sleep Medicine Portfolio with Exclusive License of Valiloxybate from XWPharma Ltd – Expands Avadel’s pipeline with salt-free, artificial sweetener-free, once-at-bedtime oxybate for treatment of narcolepsy and idiopa

Exhibit 99.1 Avadel Pharmaceuticals Strengthens Sleep Medicine Portfolio with Exclusive License of Valiloxybate from XWPharma Ltd – Expands Avadel’s pipeline with salt-free, artificial sweetener-free, once-at-bedtime oxybate for treatment of narcolepsy and idiopathic hypersomnia – – Initial pharmacokinetic (PK) and comparative bioavailability study to initiate in fourth quarter 2025 with pivotal P

August 7, 2025 S-3ASR

As filed with the Securities and Exchange Commission on August 7, 2025.

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on August 7, 2025.

August 7, 2025 EX-10.1

Employment Agreement dated as of May 1, 2025 between Avadel Management Corporation and Susan Rodriguez (filed herewith)

Exhibit 10.1 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this “Agreement”) is entered into as of the 1st day of May 2025 by and among Susan Rodriguez, currently residing at [***] (the “Executive”), and Avadel Management Corporation, a Delaware corporation with a principal office located at 16640 Chesterfield Grove Road, Suite 200, Chesterfield, Missouri 63005 (the “Company”). The Company is an

August 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977 ————

August 7, 2025 S-8

As filed with the Securities and Exchange Commission on August 7, 2025

As filed with the Securities and Exchange Commission on August 7, 2025 Registration No.

August 7, 2025 EX-FILING FEES

Filing Fee Table.

Calculation of Filing Fee Tables S-8 AVADEL PHARMACEUTICALS PLC Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee 1 Equity 2021 Inducement Plan Ordinary Shares, $0.

August 7, 2025 EX-4.2

Form of Senior Indenture

Exhibit 4.2 AVADEL PHARMACEUTICALS PLC Issuer AND , as Trustee INDENTURE Dated as of , Senior Debt Securities TABLE OF CONTENTS(1) Page Article 1 DEFINITIONS 1 Section 1.01 Definitions of Terms 1 Article 2 ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION AND EXCHANGE OF SECURITIES 5 Section 2.01 Designation and Terms of Securities 5 Section 2.02 Form of Securities and Trustee’s Certificate 8 Sec

August 7, 2025 EX-5.3

Consent of Goodwin Procter LLP (included in Exhibit 5.3 hereto)

Exhibit 5.3 Goodwin Procter LLP 100 Northern Avenue Boston, MA 02210 goodwinlaw.com +1 617 570 1000 August 7, 2025 Avadel Pharmaceuticals plc 10 Earlsfort Terrace Dublin 2 D02 T380 Ireland Re:     Securities Being Registered under Registration Statement on Form S-3 We have acted as U.S. counsel to you in connection with your filing of an automatic shelf registration statement on Form S-3ASR (as am

August 7, 2025 EX-99.1

Avadel Pharmaceuticals Reports Second Quarter 2025 Financial Results and Raises 2025 Revenue Guidance -- Generated LUMRYZ™ net revenue of $68.1 million, a 64% increase compared to second quarter 2024, net income of $9.7 million and earnings per share

Exhibit 99.1 Avadel Pharmaceuticals Reports Second Quarter 2025 Financial Results and Raises 2025 Revenue Guidance - Generated LUMRYZ™ net revenue of $68.1 million, a 64% increase compared to second quarter 2024, net income of $9.7 million and earnings per share of $0.10 - - 3,100 patients on LUMRYZ as of June 30, 2025, a 63% increase compared to June 30, 2024 - - Raises 2025 full year revenue gui

August 7, 2025 EX-10.2

Employment Agreement dated as of August 6, 2025 between Avadel Management Corporation and Jerad Seurer (filed herewith)

Exhibit 10.2 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this “Agreement”) is entered into as of the 6th day of August 2025 (the “Effective Date”) by and among Jerad G. Seurer, currently residing at [***] (the “Executive”), and Avadel Management Corporation, a Delaware corporation with a principal office located at 16640 Chesterfield Grove Road, Suite 200, Chesterfield, Missouri 63005 (the “Co

August 7, 2025 EX-FILING FEES

Filing Fee Table

Calculation of Filing Fee Tables S-3 AVADEL PHARMACEUTICALS PLC Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Equity Ordinary Shares, nominal value $0.

August 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2025 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

August 7, 2025 EX-4.3

Form of Subordinated Indenture

Exhibit 4.3 AVADEL PHARMACEUTICALS PLC Issuer AND , as Trustee INDENTURE Dated as of , Subordinated Debt Securities TABLE OF CONTENTS Page Article 1 DEFINITIONS 1 Section 1.01 Definitions of Terms 1 Article 2 ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION AND EXCHANGE OF SECURITIES 5 Section 2.01 Designation and Terms of Securities 5 Section 2.02 Form of Securities and Trustee’s Certificate 8

July 29, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 29, 2025 AVADEL PHAR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 29, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

July 14, 2025 PX14A6G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 NOTICE OF EXEMPT SOLICITATION Submitted Pursuant to Rule 14a-6(g) (Amendment No. ____)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 NOTICE OF EXEMPT SOLICITATION Submitted Pursuant to Rule 14a-6(g) (Amendment No. ) 1. Name of the Registrant: Avadel Pharmaceuticals plc 2. Name of Person Relying on Exemption: ASL Strategic Value Fund, LP 3. Address of Person Relying on the Exemption: ASL Strategic Value Fund, LP C/O Olshan Frome Wolosky LLP 1325 Avenue of th

June 30, 2025 PX14A6G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 NOTICE OF EXEMPT SOLICITATION Submitted Pursuant to Rule 14a-6(g) (Amendment No. ____)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 NOTICE OF EXEMPT SOLICITATION Submitted Pursuant to Rule 14a-6(g) (Amendment No. ) 1. Name of the Registrant: Avadel Pharmaceuticals plc 2. Name of Person Relying on Exemption: ASL Strategic Value Fund, LP 3. Address of Person Relying on the Exemption: ASL Strategic Value Fund, LP C/O Olshan Frome Wolosky LLP 1325 Avenue of th

June 27, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 27, 2025 AVADEL PHAR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 27, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

June 18, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 18, 2025 ARS

ARS

Avadel Pharmaceuticals plc Annual Report for the Year Ended 31 December 2024UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

June 18, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.       ) Filed by the Registrant ☒ Filed by a party other

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.       ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as pe

June 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 5, 2025 AVADEL PHARM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 5, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emplo

June 5, 2025 EX-99.1

Avadel Pharmaceuticals Receives Orphan Drug Designation from FDA for LUMRYZTM (sodium oxybate) for Extended-Release Oral Suspension for the Treatment of Idiopathic Hypersomnia

Exhibit 99.1 Avadel Pharmaceuticals Receives Orphan Drug Designation from FDA for LUMRYZTM (sodium oxybate) for Extended-Release Oral Suspension for the Treatment of Idiopathic Hypersomnia DUBLIN, Ireland, June 5, 2025 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, announced today that LUMRYZTM has been granted Orphan

May 13, 2025 EX-99.1

Avadel Pharmaceuticals Expands Leadership Team with Appointment of Susan Rodriguez as Chief Operating Officer

Exhibit 99.1 Avadel Pharmaceuticals Expands Leadership Team with Appointment of Susan Rodriguez as Chief Operating Officer DUBLIN, May 13, 2025 – Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, today announced the appointment of Susan Rodriguez as Chief Operating Officer. In this newly created role, Ms. Rodriguez will lea

May 13, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 13, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emplo

May 7, 2025 8-K

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Employ

May 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977 ———

May 7, 2025 EX-99.1

Avadel Pharmaceuticals Reports First Quarter 2025 Financial Results and Raises Guidance -- Generated $52.5 million in net revenue from sales of LUMRYZ™, a 93% increase over the first quarter of 2024 -- -- 2,800 patients on LUMRYZ as of March 31, 2025

Exhibit 99.1 Avadel Pharmaceuticals Reports First Quarter 2025 Financial Results and Raises Guidance - Generated $52.5 million in net revenue from sales of LUMRYZ™, a 93% increase over the first quarter of 2024 - - 2,800 patients on LUMRYZ as of March 31, 2025, a net increase of 300 patients since December 31, 2024 and a 100% year over year increase over the first quarter of 2024 - - Raises 2025 g

May 6, 2025 EX-99.1

Avadel Pharmaceuticals Announces Favorable Ruling in Appeal of Delaware Court Injunction - With this ruling, Avadel can seek and be granted FDA approval for LUMRYZ in Idiopathic Hypersomnia - - Federal Circuit decision permits new clinical trials and

Exhibit 99.1 Avadel Pharmaceuticals Announces Favorable Ruling in Appeal of Delaware Court Injunction - With this ruling, Avadel can seek and be granted FDA approval for LUMRYZ in Idiopathic Hypersomnia - - Federal Circuit decision permits new clinical trials and further development of LUMRYZTM for the treatment of indications beyond narcolepsy - DUBLIN, Ireland, May 6, 2025 - Avadel Pharmaceutica

May 6, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Employ

April 8, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 8, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

April 8, 2025 EX-99.1

Avadel Pharmaceuticals Provides Update at Needham Virtual Healthcare Conference

Exhibit 99.1 Avadel Pharmaceuticals Provides Update at Needham Virtual Healthcare Conference DUBLIN, IRELAND, April 8, 2025 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, today presented at the 24th Annual Needham Virtual Healthcare Conference. The Company provided an update on patient demand metrics that was in line w

March 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 5, 2025 AVADEL PHAR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 5, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

March 3, 2025 EX-10.2

Fourth Amendment to Office Lease Agreement by and between Grove II LLC and Avadel Management, LLC dated February 1, 2025 (filed herewith)

FOURTH AMENDMENT TO OFFICE LEASE THIS FOURTH AMENDMENT TO OFFICE LEASE (this “Fourth Amendment”) is made and entered into as of February 1, 2025 (“Effective Date”) by and between GROVE II LLC, a Missouri limited liability company (“Landlord”), and AVADEL MANAGEMENT, LLC, a Delaware limited liability company.

March 3, 2025 EX-10.13

Amendment to Avadel Pharmaceuticals plc 2021 Inducement Plan (filed herewith)

AMENDMENT TO AVADEL PHARMACEUTICALS PLC 2021 INDUCEMENT PLAN A.The Avadel Pharmaceuticals plc 2021 Inducement Plan (the “Plan”) is hereby amended by deleting the first sentence of Section 3(a) and substituting therefore the following: “The maximum number of Shares reserved and available for issuance under the Plan shall be 2,000,000 Shares, subject to adjustment as provided in this Section 3.” B.T

March 3, 2025 EX-10.19

Form of Restricted Stock Award Agreement (filed herewith)

RESTRICTED SHARE AWARD AGREEMENT UNDER THE AVADEL PHARMACEUTICALS PLC 2020 OMNIBUS INCENTIVE COMPENSATION PLAN Name of Grantee: No.

March 3, 2025 EX-21.1

List of Subsidiaries (filed herewith)

Exhibit 21.1 List of Subsidiaries Name Jurisdiction Avadel Pharmaceuticals plc (the Registrant): Ireland 1) Avadel US Holdings, Inc. (f/k/a Flamel US Holdings, Inc.) United States (Delaware) A. Avadel Management, LLC United States (Delaware) B. Avadel CNS Pharmaceuticals, LLC United States (Delaware) 2) Flamel Ireland Ltd. (d/b/a Avadel Ireland) Ireland 3) Avadel Investment Company, Ltd. Cayman Is

March 3, 2025 EX-99.1

Avadel Pharmaceuticals Reiterates 2025 Guidance as it Reports Fourth Quarter and Full Year 2024 Financial Results -- LUMRYZ™ generated $50.4 million in sales in the fourth quarter, up 158% year-over-year, taking the full-year total to $169.1 million,

Exhibit 99.1 Avadel Pharmaceuticals Reiterates 2025 Guidance as it Reports Fourth Quarter and Full Year 2024 Financial Results - LUMRYZ™ generated $50.4 million in sales in the fourth quarter, up 158% year-over-year, taking the full-year total to $169.1 million, in line with preliminary results published January 8 - Reiterates 2025 guidance, with the number of patients on LUMRYZ expected to increa

March 3, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 3, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

March 3, 2025 EX-10.20

Non-Employee Director Compensation Policy, dated July 30, 2024 (filed herewith)

AVADEL PHARMACEUTICALS PLC NON-EMPLOYEE DIRECTOR COMPENSATION POLICY The purpose of this Non-Employee Director Compensation Policy (the “Policy”) of Avadel Pharmaceuticals plc (the “Company”) is to provide a total compensation package that enables the Company to attract and retain, on a long-term basis, high-caliber directors who are not employees or officers of the Company or its subsidiaries (“Outside Directors”).

March 3, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period to Commission file number: 001-37977 AVADEL PHARMACEUTICALS PLC (Ex

March 3, 2025 EX-10.21

Form of Indemnification Agreement between Avadel Pharmaceuticals plc and Directors and Officers (filed herewith)

AVADEL PHARMACEUTICALS PLC This Deed of Indemnification (“Deed”) is made as of by and between Avadel Pharmaceuticals plc, a public limited company incorporated in Ireland (registered number 572535) having its registered office at 10 Earlsfort Terrace, Dublin 2, D02 T380, Ireland (the “Company”) and [ ] (“Indemnitee”).

March 3, 2025 EX-10.18

Employment Agreement dated as of August 30, 2022 between Avadel Management Corporation and Jerad G. Seurer (filed herewith)

Jerad Seurer August 30, 2022 Re: Employment Letter Agreement Dear Jerad, On behalf of Avadel Pharmaceuticals plc (“Avadel plc”) and its U.

March 3, 2025 EX-19.1

Insider Trading Policy dated August 1, 2023 (filed herewith)

Avadel Pharmaceuticals plc Insider Trading Policy Purpose This Insider Trading Policy (this “Policy”) provides requirements with respect to handling confidential information about and transacting in the securities of Avadel Pharmaceuticals plc (“Avadel” or the “Company”) (Nasdaq: AVDL).

March 3, 2025 EX-10.22

Form of Indemnification Agreement between Avadel US Holdings, Inc. and Directors and Officers (filed herewith)

AVADEL US HOLDINGS, INC. This Indemnification Agreement (“Agreement”) is made as of , by and between Avadel US Holdings, Inc., a Delaware corporation (the “Company”), and (“Indemnitee”). RECITALS WHEREAS, the Company and Avadel Pharmaceuticals plc, a public limited company incorporated in Ireland (the “Parent”), desire to attract and retain the services of highly qualified individuals, such as Ind

March 3, 2025 EX-4.1

Description of Securities (filed herewith)

Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934, as amended The following description of the registered securities of Avadel Pharmaceuticals plc (“Avadel,” “we” or “our”) summarizes the material terms and provisions of our ordinary shares and preferred shares.

March 3, 2025 EX-10.8

Avadel Pharmaceuticals plc 2020 Omnibus Incentive Compensation Plan

AVADEL PHARMACEUTICALS PLC 2020 OMNIBUS INCENTIVE COMPENSATION PLAN SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Avadel Pharmaceuticals plc 2020 Omnibus Incentive Compensation Plan (the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and Consultants of Avadel Pharmaceuticals PLC, an Irish public limited

January 8, 2025 EX-99.1

Avadel Announces Preliminary 2024 Results and 2025 Commercial Priorities to Accelerate the LUMRYZ Launch -- Approximately $50.0 million of net revenue from sales of LUMRYZ™ estimated for the fourth quarter, a greater than 150% increase over $19.5 mil

Exhibit 99.1 Avadel Announces Preliminary 2024 Results and 2025 Commercial Priorities to Accelerate the LUMRYZ Launch - Approximately $50.0 million of net revenue from sales of LUMRYZ™ estimated for the fourth quarter, a greater than 150% increase over $19.5 million for the comparable period in 2023 - -2,500 patients on LUMRYZ as of December 31, 2024, including 600 patients that initiated therapy

January 8, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 8, 2025 AVADEL PH

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 8, 2025 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Em

December 3, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 2, 2024 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 2, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

November 14, 2024 SC 13G/A

AVDL / Avadel Pharmaceuticals plc / RTW INVESTMENTS, LP - AVADEL PHARMACEUTICALS PLC Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 6)* Avadel Pharmaceuticals PLC (Name of Issuer) Ordinary Shares, nominal value $0.01 per share (Title of Class of Securities) 05337M104** (CUSIP Number) September 30, 2024 (Date of event which requires filing of this statement) Check the appropriate box to designate the

November 14, 2024 SC 13G/A

AVDL / Avadel Pharmaceuticals plc / JANUS HENDERSON GROUP PLC - JANUS AMENDMENT Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Amendment No.: 2* Name of Issuer: AVADEL PHARMACEUTICALS Title of Class of Securities: Common Stock CUSIP Number: G29687103 Date of Event Which Requires Filing of this Statement: 9/30/2024 Check the appropriate box to designate the rule pursuant to which this Schedule is f

November 13, 2024 SC 13G/A

AVDL / Avadel Pharmaceuticals plc / COWEN AND COMPANY, LLC - COWEN AND COMPANY, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Avadel Pharmaceuticals PLC (Name of Issuer) Ordinary Shares, nominal value $0.01 per share (Title of Class of Securities) 05337M104 (CUSIP Number) September 30, 2024 (Date of Event which Requires Filing of this Statement) Check the appropriate box to des

November 13, 2024 SC 13G/A

AVDL / Avadel Pharmaceuticals plc / Polar Capital Holdings Plc Passive Investment

SC 13G/A 1 polar-avdl093024a1.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* AVADEL PHARMACEUTICALS PLC (Name of Issuer) American Depository Shares, each representing on Ordinary Share, nominal value $0.01 per share (Title of Class of Securities) 05337M104 (CUSIP Number) September 30, 2024 (Date

November 12, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977

November 12, 2024 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports Third Quarter 2024 Financial Results -- Generated $50.0 million in net revenue from sales of LUMRYZ™ -- --2,300 patients on LUMRYZ as of September 30th, including 700 patients that initiate

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports Third Quarter 2024 Financial Results - Generated $50.0 million in net revenue from sales of LUMRYZ™ - -2,300 patients on LUMRYZ as of September 30th, including 700 patients that initiated therapy in the quarter - - Received FDA approval for LUMRYZ for the treatment of cataplexy or EDS in patients 7 years and older with narco

November 12, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 12, 2024 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 12, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

November 8, 2024 SC 13G

AVDL / Avadel Pharmaceuticals plc / BlackRock, Inc. Passive Investment

SC 13G 1 ie00bdgmc594110824.txt ie00bdgmc594110824.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) AVADEL PHARMACEUTICALS ORD - (Name of Issuer) Common Stock - (Title of Class of Securities) BDGMC59 - (SEDOL Number) September 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriate

October 31, 2024 EX-99.1

Avadel Pharmaceuticals Announces Favorable Ruling in Administrative Procedure Act Litigation

Exhibit 99.1 Avadel Pharmaceuticals Announces Favorable Ruling in Administrative Procedure Act Litigation DUBLIN, Ireland, October 31, 2024 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, announced that yesterday, the U.S. District Court for the District of Columbia (“Court”) ruled in favor of the Food and Drug Administ

October 31, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 30, 2024 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 30, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

October 24, 2024 SC 13G

AVDL / Avadel Pharmaceuticals plc / BlackRock, Inc. Passive Investment

SC 13G 1 ie00bdgmc594102424.txt ie00bdgmc594102424.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) AVADEL PHARMACEUTICALS ORD - (Name of Issuer) Common Stock - (Title of Class of Securities) BDGMC59 - (SEDOL Number) September 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriate

October 17, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 17, 2024 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 17, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

October 17, 2024 EX-99.1

Avadel Pharmaceuticals Announces FDA Approval of LUMRYZ™ (sodium oxybate) Extended-Release Oral Suspension (CIII) for the Treatment of Cataplexy or Excessive Daytime Sleepiness in Patients 7 Years of Age and Older with Narcolepsy -- LUMRYZ is the onl

Exhibit 99.1 Avadel Pharmaceuticals Announces FDA Approval of LUMRYZ™ (sodium oxybate) Extended-Release Oral Suspension (CIII) for the Treatment of Cataplexy or Excessive Daytime Sleepiness in Patients 7 Years of Age and Older with Narcolepsy - LUMRYZ is the only FDA-approved once-at-bedtime oxybate treatment for cataplexy or excessive daytime sleepiness (EDS) in patients 7 years of age and older

September 12, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 12, 2024 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 12, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

August 28, 2024 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 27, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Em

August 8, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2024 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

August 8, 2024 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports Second Quarter 2024 Financial Results -- Generated $41.5 million in net revenue from sales of LUMRYZ™ -- -- More than 1,900 patients on LUMRYZ as of June 30th -- -- First patient dosed in P

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports Second Quarter 2024 Financial Results - Generated $41.5 million in net revenue from sales of LUMRYZ™ - - More than 1,900 patients on LUMRYZ as of June 30th - - First patient dosed in Phase 3 trial evaluating LUMRYZ in idiopathic hypersomnia - - FDA target action date of September 7, 2024 for sNDA for LUMRYZ in pediatric narc

August 8, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977 ————

August 1, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2024 AVADEL PHAR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

July 31, 2024 EX-99.1

Avadel Pharmaceuticals Announces First Patient Dosed in Phase 3 REVITALYZ™ Trial of LUMRYZTM (sodium oxybate) Extended-Release Oral Suspension for the Treatment of Idiopathic Hypersomnia

Exhibit 99.1 Avadel Pharmaceuticals Announces First Patient Dosed in Phase 3 REVITALYZ™ Trial of LUMRYZTM (sodium oxybate) Extended-Release Oral Suspension for the Treatment of Idiopathic Hypersomnia DUBLIN, Ireland, July 31, 2024 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, announced today that the first patient has

July 31, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2024 AVADEL PHAR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

June 27, 2024 EX-99.1

Avadel Pharmaceuticals to Join Russell 3000® Index

Exhibit 99.1 Avadel Pharmaceuticals to Join Russell 3000® Index DUBLIN, Ireland, June 27, 2024 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, announced today that it is set to join the broad-market Russell 3000® Index at the conclusion of the 2024 Russell US Indexes annual reconstitution, effective at the open of US eq

June 27, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 27, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

June 18, 2024 ARS

ARS

Avadel Pharmaceuticals plc Annual Report for the Year Ended 31 December 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

June 18, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

June 18, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.       ) Filed by the Registrant ☒ Filed by a party other

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.       ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as pe

May 21, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 17, 2024 AVADEL PHARM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 17, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emplo

May 21, 2024 EX-99.1

Avadel Pharmaceuticals Appoints Naseem Amin, M.D. to its Board of Directors

Exhibit 99.1 Avadel Pharmaceuticals Appoints Naseem Amin, M.D. to its Board of Directors DUBLIN, Ireland, May 21, 2024 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, announced today the appointment of Naseem Amin, M.D. to its board of directors, effective May 17, 2024. Dr. Amin, a highly successful executive who brings

May 17, 2024 S-8

As filed with the Securities and Exchange Commission on May 17, 2024

As filed with the Securities and Exchange Commission on May 17, 2024 Registration No.

May 17, 2024 EX-FILING FEES

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) Avadel Pharmaceuticals Plc (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity 2020 Omnibus Incentive Compensation Plan Ordinary Shares, $0.

May 8, 2024 424B5

Avadel Pharmaceuticals plc Up to $100,000,000 Ordinary Shares

Filed Pursuant to Rule 424(b)(5) Registration Statement No. 333-267198 PROSPECTUS SUPPLEMENT (To prospectus dated September 12, 2022) Avadel Pharmaceuticals plc Up to $100,000,000 Ordinary Shares We have entered into an Open Market Sale AgreementSM, or the Sales Agreement, with Jefferies LLC, or Jefferies, relating to our ordinary shares, nominal value $0.01 per share, offered by this prospectus s

May 8, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977 ———

May 8, 2024 EX-1.1

, dated as of May 8, 2024, by and between Avadel Pharmaceuticals plc and Jefferies LLC (incorporated by reference to Exhibit 1.1 to the registrant’s current report on Form 8-K, filed on May 8, 2024)

Exhibit 1.1 Execution Version OPEN MARKET SALE AGREEMENTSM May 8, 2024 JEFFERIES LLC 520 Madison Avenue New York, New York 10022 Ladies and Gentlemen: Avadel Pharmaceuticals plc, an Irish incorporated public limited company (the “Company”), proposes, subject to the terms and conditions stated herein, to issue and sell from time to time through Jefferies LLC, as sales agent and/or principal (the “A

May 8, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Employ

May 8, 2024 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports First Quarter 2024 Financial Results -- Generated $27.2 million in net revenue from sales of LUMRYZ™ -- -- Through March 31, greater than 2,800 patients enrolled in Avadel’s RYZUP patient s

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports First Quarter 2024 Financial Results - Generated $27.2 million in net revenue from sales of LUMRYZ™ - - Through March 31, greater than 2,800 patients enrolled in Avadel’s RYZUP patient support services and more than 1,700 patients initiated therapy - - Pursuing expansion opportunities for LUMRYZ with sNDA in pediatric narcol

May 8, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2024 AVADEL PHARMA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Employ

April 26, 2024 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period to Commission file number: 001-37977 AVADEL PHA

April 15, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 15, 2024 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 15, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

April 15, 2024 8-A12B

Form 8-A filed with the SEC on April 15, 2024

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 98-1341933 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification

March 4, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 4, 2024 AVADEL PHAR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 4, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

March 4, 2024 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports Fourth Quarter and Full Year 2023 Financial -- Generated $19.5 million in fourth quarter and $28.0 million of full year 2023 net revenue from sales of LUMRYZ™ -- -- As of January 31st, grea

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports Fourth Quarter and Full Year 2023 Financial Results - Generated $19.5 million in fourth quarter and $28.0 million of full year 2023 net revenue from sales of LUMRYZ™ - - As of January 31st, greater than 2,200 patients enrolled in RYZUPTM and more than 1,200 patients initiated therapy - - Payer coverage now in place for great

March 4, 2024 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 4, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

February 29, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period to Commission file number: 001-37977 AVADEL PHARMACEUTICALS PLC (Ex

February 29, 2024 EX-21.1

List of Subsidiaries (filed herewith)

Exhibit 21.1 List of Subsidiaries Name Jurisdiction Avadel Pharmaceuticals plc (the Registrant): Ireland 1) Avadel US Holdings, Inc. (f/k/a Flamel US Holdings, Inc.) United States (Delaware) B. Avadel Legacy Pharmaceuticals, LLC (f/k/a Éclat Pharmaceuticals LLC) United States (Delaware) C. Avadel Management Corporation United States (Delaware) D. Avadel CNS Pharmaceuticals, LLC United States (Dela

February 29, 2024 EX-14.1

Code of Business Conduct and Ethics (

Avadel Code of Conduct Dear Colleagues, At Avadel, the way we do business is as important as the results we achieve.

February 29, 2024 EX-97.1

Avadel Pharmaceuticals plc Compensation Recovery Policy (filed herewith)

AVADEL PHARMACEUTICALS PLC COMPENSATION RECOVERY POLICY Adopted as of August 1, 2023 Avadel Pharmaceuticals plc, an Irish public limited company (the “Company”), has adopted a Compensation Recovery Policy (this “Policy”) as described below.

February 29, 2024 EX-10.25

Generic API Supply Agreement

CERTAIN IDENTIFIED INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED, AND HAS BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

February 29, 2024 EX-4.2

Description of Securities (filed herewith)

Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934, as amended The following description of the registered securities of Avadel Pharmaceuticals plc (“Avadel,” “we” or “our”) summarizes the material terms and provisions of our ordinary shares, which may be represented by American Depositary Shares, or ADSs, and preferred shares.

February 14, 2024 SC 13G/A

AVDL / Avadel Pharmaceuticals plc - Depositary Receipt (Common Stock) / RTW INVESTMENTS, LP - AVADEL PHARMACEUTICALS PLC Passive Investment

SC 13G/A 1 p24-0517sc13ga.htm AVADEL PHARMACEUTICALS PLC SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 5)* Avadel Pharmaceuticals PLC (Name of Issuer) Ordinary Shares, nominal value $0.01 per share (Title of Class of Securities) 05337M104** (CUSIP Number) December 31, 2023 (Date of event which requires filing of th

February 13, 2024 SC 13G/A

AVDL / Avadel Pharmaceuticals plc - Depositary Receipt (Common Stock) / GENDELL JEFFREY L - AMENDMENT NO. 2 Passive Investment

SC 13G/A 1 avdl212240sc13ga2.htm AMENDMENT NO. 2 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* Avadel Pharmaceuticals plc (Name of Issuer) American Depositary Shares, each representing one Ordinary Share, nominal value $0.01 per share (Title of Class of Securities) 05337M104 (CUSIP Number) Decembe

February 13, 2024 SC 13G

AVDL / Avadel Pharmaceuticals plc - Depositary Receipt (Common Stock) / Polar Capital Holdings Plc Passive Investment

SC 13G 1 polar-avdl123123.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* AVADEL PHARMACEUTICALS PLC (Name of Issuer) American Depository Shares, each representing on Ordinary Share, nominal value $0.01 per share (Title of Class of Securities) 05337M104 (CUSIP Number) December 31, 2023 (Date of Event

February 13, 2024 SC 13G/A

AVDL / Avadel Pharmaceuticals plc - Depositary Receipt (Common Stock) / JANUS HENDERSON GROUP PLC - JHG PLC OWNS >5% Passive Investment

SC 13G/A 1 avadel123123.txt JHG PLC OWNS >5% UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Amendment No.: 1* Name of Issuer: AVADEL PHARMACEUTICALS PLC Title of Class of Securities: American Depositary Shares CUSIP Number: 05337M104 Date of Event Which Requires Filing of this Statement: 12/31/2023 Check the appropriat

February 12, 2024 SC 13G/A

AVDL / Avadel Pharmaceuticals plc - Depositary Receipt (Common Stock) / KOTLER KEVIN Passive Investment

SC 13G/A 1 d1097982813g-a.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* AVADEL PHARMACEUTICALS PLC (Name of Issuer) American Depositary Shares, each representing one Ordinary Share, nominal value $0.01 per share (Title of Class of Securities) 05337M104 (CUSIP Number) February 12, 2024 (Date of Eve

January 8, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 8, 2024 AVADEL PH

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 8, 2024 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Em

January 8, 2024 EX-99.1

Avadel Pharmaceuticals Announces Strong LUMRYZ Launch Performance and Provides Preliminary Fourth Quarter and Full Year 2023 Financial Highlights -- Approximately $19 million and $28 million of net revenue from sales of LUMRYZ™ estimated for the four

Exhibit 99.1 Avadel Pharmaceuticals Announces Strong LUMRYZ Launch Performance and Provides Preliminary Fourth Quarter and Full Year 2023 Financial Highlights - Approximately $19 million and $28 million of net revenue from sales of LUMRYZ™ estimated for the fourth quarter and full year 2023, respectively - - Generated continued robust demand for LUMRYZ with greater than 1,900 patients enrolled in

November 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977

November 8, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 8, 2023 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 8, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

November 8, 2023 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports Third Quarter 2023 Financial Results -- $7.0 million in third quarter LUMRYZ™ net revenue from U.S. commercial launch -- -- Generated robust demand for LUMRYZ with greater than 1,000 patien

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports Third Quarter 2023 Financial Results - $7.0 million in third quarter LUMRYZ™ net revenue from U.S. commercial launch - - Generated robust demand for LUMRYZ with greater than 1,000 patients enrolled in RYZUPTM and more than 400 patients initiating therapy as of September 30 - - LUMRYZ to be added to preferred position for CVS

August 10, 2023 SC 13G

AVDL / Avadel Pharmaceuticals plc - ADR / JANUS HENDERSON GROUP PLC - JANUS HENDERSON GROUP PLC OWNS 12% Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Amendment No.: 0* Name of Issuer: AVADEL PHARMACEUTICALS PLC Title of Class of Securities: American Depositary Shares CUSIP Number: 05337M104 Date of Event Which Requires Filing of this Statement: 7/31/2023 Check the appropriate box to designate the rule pursuant to which

August 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977 ————

August 9, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 9, 2023 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 9, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

August 9, 2023 EX-10.1

, between Avadel Management Corporation

FOURTH AMENDMENT TO SUBLEASE AGREEMENT This Fourth Amendment to Sublease Agreement (this “Fourth Amendment”), is made and entered into effective as of the 31st day of May, 2023 (the “Effective Date”), by and between Avadel Management Corporation, a Delaware corporation (f/k/a Eclat Pharmaceuticals LLC) (hereinafter called “Sublessor”) and R.

August 9, 2023 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports Second Quarter 2023 Financial Results -- Successfully commenced U.S. commercial launch of LUMRYZTM-- -- Received final FDA approval for LUMRYZ with orphan drug exclusivity granted through M

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports Second Quarter 2023 Financial Results - Successfully commenced U.S. commercial launch of LUMRYZTM- - Received final FDA approval for LUMRYZ with orphan drug exclusivity granted through May 1, 2030 - - Significant early progress on payor coverage, prescriber certifications and patient enrollments - - Management to host a conf

August 3, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2023 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

August 3, 2023 EX-10.1

Amendment to the Avadel Pharmaceuticals plc 2020 Omnibus Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the registrant’s current report on Form 8-K, filed August 3, 2023)

Exhibit 10.1 AMENDMENT TO THE AVADEL PHARMACEUTICALS PLC 2020 OMNIBUS INCENTIVE COMPENSATION PLAN WHEREAS, Avadel Pharmaceuticals plc (the “Company”) maintains the Avadel Pharmaceuticals plc 2020 Omnibus Incentive Compensation Plan (the “Plan”), which was previously adopted by the Board of Directors on April 13, 2020 and approved by the shareholders of the Company on August 5, 2020; WHEREAS, the B

August 3, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2023 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

June 5, 2023 EX-99.1

Avadel Pharmaceuticals Announces U.S. Commercial Launch of LUMRYZ™ (sodium oxybate) for the Treatment of Cataplexy or Excessive Daytime Sleepiness in Adults Living with Narcolepsy -LUMRYZ is the first and only once-at-bedtime oxybate for people livin

Exhibit 99.1 Avadel Pharmaceuticals Announces U.S. Commercial Launch of LUMRYZ™ (sodium oxybate) for the Treatment of Cataplexy or Excessive Daytime Sleepiness in Adults Living with Narcolepsy -LUMRYZ is the first and only once-at-bedtime oxybate for people living with narcolepsy -Once-nightly dosing regimen of LUMRYZ has been found by FDA to provide a major contribution to patient care over all t

June 5, 2023 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ☒ Filed by a party other than

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitt

June 5, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 5, 2023 AVADEL PHARM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 5, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emplo

May 31, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 31, 2023 AVADEL PHARM

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 31, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emplo

May 4, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2023 AVADEL PHARMA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Employ

May 4, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977 ———

May 4, 2023 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports First Quarter 2023 Financial -- Received FDA approval for LUMRYZ™ (sodium oxybate), the first and only once-at-bedtime oxybate for treatment of cataplexy or excessive daytime sleepiness (ED

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports First Quarter 2023 Financial Results - Received FDA approval for LUMRYZ™ (sodium oxybate), the first and only once-at-bedtime oxybate for treatment of cataplexy or excessive daytime sleepiness (EDS) in adults with narcolepsy – - FDA awarded LUMRYZ Orphan Drug Exclusivity through May 1, 2030 - - LUMRYZ product availability on

May 1, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2023 AVADEL PHARMA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Employ

May 1, 2023 EX-99.1

Avadel Pharmaceuticals Announces Final FDA Approval of LUMRYZ™ (sodium oxybate) for Extended-Release Oral Suspension as the First and Only Once-at-Bedtime Oxybate for Cataplexy or Excessive Daytime Sleepiness in Adults with Narcolepsy - Granted Orpha

Exhibit 99.1 Avadel Pharmaceuticals Announces Final FDA Approval of LUMRYZ™ (sodium oxybate) for Extended-Release Oral Suspension as the First and Only Once-at-Bedtime Oxybate for Cataplexy or Excessive Daytime Sleepiness in Adults with Narcolepsy - Granted Orphan Drug Exclusivity through May 1, 2030 - -Advanced commercial preparations on track; LUMRYZ product availability expected in early June -

April 28, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

April 28, 2023 ARS

ARS

Avadel Pharmaceuticals plc Annual Report for the Year Ended 31 December 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 28, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.      ) Filed by the Registrant ☒ Filed by a party other t

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.      ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as per

April 5, 2023 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 3, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

April 5, 2023 EX-4.1

Indenture, dated as of April 3, 2023, by and between Avadel Finance Cayman Limited, the Company and The Bank of New York Mellon, as Trustee (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K (File No. 001-37977) filed with the SEC on April 5, 2023)

Exhibit 4.1 Execution Version AVADEL FINANCE CAYMAN LIMITED, as Notes Issuer AND AVADEL PHARMACEUTICALS PLC, as Guarantor AND THE BANK OF NEW YORK MELLON, as Trustee INDENTURE Dated as of April 3, 2023 6.00% Exchangeable Senior Notes due 2027 TABLE OF CONTENTS Page Article 1 Definitions Section 1.01. Definitions 1 Section 1.02. References to Interest 19 Article 2 Issue, Description, Execution, Reg

April 3, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 3, 2023 AVADEL PHAR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 3, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

March 30, 2023 EX-3.1

Certificate of Designation of Series B Non-Voting Convertible Preferred Shares of Avadel Pharmaceuticals plc, dated March 29, 2023 (incorporated by reference to Exhibit 3.1 to the registrant’s current report on Form 8-K, filed on March 30, 2023)

Exhibit 3.1 CERTIFICATE OF DESIGNATION OF SERIES B NON-VOTING CONVERTIBLE PREFERRED SHARES OF AVADEL PHARMACEUTICALS PLC Avadel Pharmaceuticals plc, an Irish public limited company (the “Company”), does hereby certify that, in accordance with Article 108 of the Articles of Association of the Company (the “Articles of Association”), the following resolution was duly adopted by the Board of Director

March 30, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 29, 2023 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 29, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

March 30, 2023 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports Fourth Quarter and Full Year 2022 Financial · LUMRYZ™ NDA amendment filed March 1 requesting FDA final approval · Received FDA authorization to import LUMRYZ in advance of final approval de

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports Fourth Quarter and Full Year 2022 Financial Results · LUMRYZ™ NDA amendment filed March 1 requesting FDA final approval · Received FDA authorization to import LUMRYZ in advance of final approval decision; shortens timeline between potential approval and product availability · Secured $200 million of capital to fund the launc

March 30, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 30, 2023 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 30, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

March 30, 2023 424B5

Avadel Pharmaceuticals plc 10,000,001 AMERICAN DEPOSITARY SHARES Representing Ordinary Shares and 4,705,882 SEries B Non-Voting Convertible Preferred Shares

Filed Pursuant to Rule 424(b)(5) File No: 333-267198 PROSPECTUS SUPPLEMENT (To Prospectus dated September 12, 2022) Avadel Pharmaceuticals plc 10,000,001 AMERICAN DEPOSITARY SHARES Representing Ordinary Shares and 4,705,882 SEries B Non-Voting Convertible Preferred Shares We are selling 10,000,001 American Depositary Shares, or the ADSs, and, in lieu of selling ADSs to certain investors, 4,705,882 Series B Non-Voting Convertible Preferred Shares, nominal value $0.

March 30, 2023 EX-10.2

Purchase and Sale Agreement, dated March 29, 2023, between Avadel CNS Pharmaceuticals, LLC, the Company, Flamel Ireland Ltd., and RTW Royalty II DAC (incorporated by reference to Exhibit 10.2 to the registrant’s current report on Form 8-K, filed on March 30, 2023)

Exhibit 10.2 Certain information indicated with [***] in this document has been omitted from this exhibit because it is both (i) not material and (ii) is the type that the registrant treats as private or confidential. Purchase and Sale Agreement By and Between RTW Royalty II DAC, on the one hand And Avadel CNS Pharmaceuticals, LLC, and Solely for the Limited Purposes Provided for Herein, Avadel Ph

March 30, 2023 EX-1.1

Underwriting Agreement, dated March 29, 2023, by and between the Company and Jefferies LLC.

  Exhibit 1.1   Execution Version   Avadel Pharmaceuticals plc   10,000,001 American Depositary Shares Representing 10,000,001 Ordinary Shares   4,705,882 Series B Non-Voting Convertible Preferred Shares   UNDERWRITING AGREEMENT   March 29, 2023   JEFFERIES LLC As Representative of the several Underwriters   c/o JEFFERIES LLC 520 Madison Avenue New York, New York 10022   Ladies and Gentlemen:   In

March 30, 2023 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 29, 2023 AVADEL PHARMACEUTICALS PLC (Exact Name of Registrant as Specified in its Charter) Ireland 001-37977 98-1341933 (State or other jurisdiction

March 29, 2023 EX-10.21

Manufacturing Agreement by and between Flamel Ireland Limited and Recipharm Pessac, dated as of October 1, 2022 (incorporated by reference to Exhibit 10.21 to the registrant’s Annual Report on Form 10-K for the year ended December 31, 2022, filed on March 29, 2023)

Certain information indicated with [***] in this document has been omitted from this exhibit because it is both (i) not material and (ii) is the type that the registrant treats as private or confidential.

March 29, 2023 424B5

Subject to Completion, dated March 29, 2023

The information in this preliminary prospectus supplement is not complete and may be changed.

March 29, 2023 EX-21.1

List of Subsidiaries (filed herewith)

Exhibit 21.1 List of Subsidiaries Name Jurisdiction Avadel Pharmaceuticals plc (the Registrant): Ireland 1) Avadel US Holdings, Inc. (f/k/a Flamel US Holdings, Inc.) United States (Delaware) B. Avadel Legacy Pharmaceuticals, LLC (f/k/a Éclat Pharmaceuticals LLC) United States (Delaware) C. Avadel Management Corporation United States (Delaware) D. Avadel CNS Pharmaceuticals, LLC United States (Dela

March 29, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period to Commission file number: 001-37977 AVADEL PHARMACEUTICALS PLC (Ex

March 29, 2023 EX-10.22

Generic API Supply Agreement by and between Euticals Inc. and Avadel CNS Pharmaceuticals, LLC, dated as of January 2, 2020 (incorporated by reference to Exhibit 10.22 to the registrant’s Annual Report on Form 10-K for the year ended December 31, 2022, filed on March 29, 2023)

Certain information indicated with [***] in this document has been omitted from this exhibit because it is both (i) not material and (ii) is the type that the registrant treats as private or confidential.

March 29, 2023 EX-10.1

Form of Exchange Agreement between the Issuer, the Company and certain holders of the 2023 Notes.

Exhibit 10.1 March 29, 2023 Avadel Finance Cayman Limited c/o Avadel Pharmaceuticals plc 10 Earlsfort Terrace Dublin 2, Ireland D02 T380 Attention: General Counsel Re: Exchange for Avadel Finance Cayman Limited Exchangeable Senior Notes due 2023 Ladies and Gentlemen: Avadel Finance Cayman Limited, a Cayman Islands exempted company limited by shares (the “Company”), is offering a new series of its

March 29, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 29, 2023 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 29, 2023 AVADEL PHARMACEUTICALS PLC (Exact Name of Registrant as Specified in its Charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

March 29, 2023 EX-4.6

Description of Securities (filed herewith)

Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934, as amended The following description of the registered securities of Avadel Pharmaceuticals plc (“Avadel,” “we” or “our”) summarizes the material terms and provisions of our ordinary shares, which may be represented by American Depositary Shares, or ADSs, and preferred shares.

March 22, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 22, 2023 AVADEL PHA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 22, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

March 22, 2023 EX-99.1

Avadel Pharmaceuticals Announces FDA Authorization to Import Tentatively-Approved LUMRYZ™ Ahead of Anticipated Final Approval Decision Importation of LUMRYZ to the U.S. shortens the time to product availability following a final approval decision

Exhibit 99.1 Avadel Pharmaceuticals Announces FDA Authorization to Import Tentatively-Approved LUMRYZ™ Ahead of Anticipated Final Approval Decision Importation of LUMRYZ to the U.S. shortens the time to product availability following a final approval decision DUBLIN, Ireland, March 22, 2023 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines t

March 9, 2023 SC 13G

AVDL / Avadel Pharmaceuticals plc - ADR / KOTLER KEVIN Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

March 2, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 2, 2023 AVADEL PHAR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 2, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

February 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2023 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

February 14, 2023 SC 13G/A

AVDL / Avadel Pharmaceuticals plc / GENDELL JEFFREY L - AMENDMENT NO. 1 Passive Investment

SC 13G/A 1 avdlp213231sc13ga1.htm AMENDMENT NO. 1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Avadel Pharmaceuticals plc (Name of Issuer) American Depositary Shares, each representing one Ordinary Share, nominal value $0.01 per share (Title of Class of Securities) 05337M104 (CUSIP Number) Decemb

February 14, 2023 SC 13G/A

AVDL / Avadel Pharmaceuticals plc / RTW INVESTMENTS, LP - AVADEL PHARMACEUTICALS PLC Passive Investment

SC 13G/A 1 p23-0513sc13ga.htm AVADEL PHARMACEUTICALS PLC SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 4)* Avadel Pharmaceuticals PLC (Name of Issuer) Ordinary Shares, nominal value $0.01 per share (Title of Class of Securities) 05337M104** (CUSIP Number) December 31, 2022 (Date of event which requires filing of th

February 14, 2023 SC 13G/A

AVDL / Avadel Pharmaceuticals plc / Vivo Opportunity, LLC - AMENDMENT NO. 2 TO SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2 )* Avadel Pharmaceuticals plc (Name of Issuer) Ordinary Shares, nominal value $0.01, represented by American Depositary Shares (Title of Class of Securities) 05337M104 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statemen

February 13, 2023 SC 13G/A

AVDL / Avadel Pharmaceuticals plc / KOTLER KEVIN Passive Investment

SC 13G/A 1 d994333613g-a.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Avadel Pharmaceuticals plc (Name of Issuer) American Depositary Shares, each representing one Ordinary Share, nominal value $0.01 per share (Title of Class of Securities) 05337M104 (CUSIP Number) December 31, 2022 (Date of Even

February 1, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 1, 2023 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 1, 2023 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

November 18, 2022 EX-99.1

Avadel Pharmaceuticals Announces Favorable Ruling on Motion to Delist REMS Patent from FDA’s Orange Book - Delisting of REMS Patent sets path to potentially accelerate final approval by FDA

Exhibit 99.1 Avadel Pharmaceuticals Announces Favorable Ruling on Motion to Delist REMS Patent from FDA’s Orange Book - Delisting of REMS Patent sets path to potentially accelerate final approval by FDA DUBLIN, Ireland, November 18, 2022 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, announced today that the United Sta

November 18, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2022 AVADEL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

November 9, 2022 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports Third Quarter 2022 Financial Results · LUMRYZ™ granted tentative approval on July 18, confirming its safety profile and clinical efficacy · Final approval decision of LUMRYZ expected by Jun

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports Third Quarter 2022 Financial Results · LUMRYZ™ granted tentative approval on July 18, confirming its safety profile and clinical efficacy · Final approval decision of LUMRYZ expected by June 2023; advancing strategy to potentially accelerate final approval · Commercial launch planned for no later than Q3 2023; launch prepara

November 9, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ——————— FORM 10-Q ——————— ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37977

November 9, 2022 EX-10.2

First Amendment to Employment Agreement, dated as of September 28, 2022, between Avadel Management Corporation and Thomas S. McHugh (incorporated by reference to Exhibit 10.2 to the registrant’s Quarterly Report on From 10-Q, for the quarter ended September 30, 2022, filed on November 9, 2022)

FIRST AMENDMENT TO EMPLOYMENT AGREEMENT This First Amendment to Employment Agreement (this “Amendment”) is made effective as of September 28, 2022 (the “Amendment Effective Date”), by and between Avadel Management Corporation, a Delaware corporation (the “Company”), and Thomas S.

November 9, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 9, 2022 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 9, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

November 9, 2022 EX-10.1

First Amendment to Employment Agreement, dated as of September 28, 2022, between Avadel Management Corporation and Gregory J. Divis (incorporated by reference to Exhibit 10.1 to the registrant’s Quarterly Report on From 10-Q, for the quarter ended September 30, 2022, filed on November 9, 2022)

FIRST AMENDMENT TO EMPLOYMENT AGREEMENT This First Amendment to Employment Agreement (this “Amendment”) is made effective as of September 28, 2022 (the “Amendment Effective Date”), by and between Avadel Management Corporation, a Delaware corporation (the “Company”), and Gregory J.

November 9, 2022 EX-10.3

First Amendment to Employment Agreement, dated as of September 28, 2022, between Avadel Management Corporation and Richard Kim (incorporated by reference to Exhibit 10.3 to the registrant’s Quarterly Report on From 10-Q, for the quarter ended September 30, 2022, filed on November 9, 2022)

FIRST AMENDMENT TO EMPLOYMENT AGREEMENT This First Amendment to Employment Agreement (this “Amendment”) is made effective as of September 28, 2022 (the “Amendment Effective Date”), by and between Avadel Management Corporation, a Delaware corporation (the “Company”), and Richard Kim (the “Executive”).

November 4, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 3, 2022 AVADEL P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 3, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS E

September 30, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 28, 2022 AVADEL PHARMACEUTICALS PLC (Exact Name of Registrant as Specified in its Charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS

September 8, 2022 LETTER

LETTER

United States securities and exchange commission logo September 8, 2022 Tom McHugh Chief Financial Officer Avadel Pharmaceuticals PLC 16640 Chesterfield Grove, Suite 200 Road Chesterfield, MO 63005 Re: Avadel Pharmaceuticals PLC Registration Statement on Form S-3 Filed August 31, 2022 File No.

September 8, 2022 CORRESP

VIA EDGAR

VIA EDGAR September 8, 2022 United States Securities and Exchange Commission Office of Life Sciences Division of Corporation Finance 100 F Street, N.

August 31, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Avadel Pharmaceuticals plc (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit(7) Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial effective date Filing Fee Previously Paid In Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to Be Paid Equity Ordinary Shares, nominal value $0.

August 31, 2022 EX-4.5

Form of Senior Indenture

Exhibit 4.5 AVADEL PHARMACEUTICALS PLC Issuer AND ??????????????????????????????????????????, as Trustee INDENTURE Dated as of ?????????????????????, Senior Debt Securities TABLE OF CONTENTS(1) Page Article 1 DEFINITIONS 1 Section 1.01 Definitions of Terms 1 Article 2 ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION AND EXCHANGE OF SECURITIES 5 Section 2.01 Designation and Terms of Securities 5

August 31, 2022 S-3

As filed with the Securities and Exchange Commission on August 31, 2022.

S-3 1 tm2224869d1s3.htm FORM S-3 As filed with the Securities and Exchange Commission on August 31, 2022. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 98-1341933 (State or other jurisdiction of in

August 31, 2022 EX-4.6

Form of Subordinated Indenture

Exhibit 4.6 AVADEL PHARMACEUTICALS PLC Issuer AND ??????????????????????????????????????????, as Trustee INDENTURE Dated as of ?????????????????, Subordinated Debt Securities TABLE OF CONTENTS Page Article 1 DEFINITIONS 1 Section 1.01 Definitions of Terms 1 Article 2 ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION AND EXCHANGE OF SECURITIES 5 Section 2.01 Designation and Terms of Securities 5 S

August 25, 2022 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 23, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Em

August 9, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ??????? FORM 10-Q ??????? ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-28508 ????

August 9, 2022 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update and Reports Second Quarter 2022 Financial Results · Received tentative approval for LUMRYZ™ (sodium oxybate) extended-release for oral suspension from FDA on July 18 · Advancing key activities to poten

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update and Reports Second Quarter 2022 Financial Results · Received tentative approval for LUMRYZ™ (sodium oxybate) extended-release for oral suspension from FDA on July 18 · Advancing key activities to potentially accelerate final approval and shorten launch window of LUMRYZ · Extended cash runway to final FDA decision · Management to host a

August 9, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 9, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

August 5, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Emp

July 22, 2022 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 21, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

July 19, 2022 EX-99.1

Avadel Pharmaceuticals Announces Tentative Approval of LUMRYZ™ (sodium oxybate) extended-release oral suspension - Validates the safety profile and clinical efficacy of LUMRYZ - Pursuing strategies to accelerate final approval

Exhibit 99.1 Avadel Pharmaceuticals Announces Tentative Approval of LUMRYZ? (sodium oxybate) extended-release oral suspension - Validates the safety profile and clinical efficacy of LUMRYZ - Pursuing strategies to accelerate final approval DUBLIN, Ireland, July 19 , 2022 - Avadel Pharmaceuticals plc (Nasdaq: AVDL), a biopharmaceutical company focused on transforming medicines to transform lives, t

July 19, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 19, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

June 29, 2022 EX-99.1

Avadel Pharmaceuticals Provides Corporate Update - Pursuing strategies to accelerate final approval of FT218 NDA - Optimizing cost structure to fund strategic priorities and extend cash runway - Continuing key activities to accelerate launch timing o

Exhibit 99.1 Avadel Pharmaceuticals Provides Corporate Update - Pursuing strategies to accelerate final approval of FT218 NDA - Optimizing cost structure to fund strategic priorities and extend cash runway - Continuing key activities to accelerate launch timing of FT218, targeting multi-billion-dollar narcolepsy market opportunity - Management to host a conference call tomorrow, June 30 at 8:00 a.

June 29, 2022 8-K

Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 29, 2022 AVADEL PHARMACEUTICALS PLC (Exact name of registrant as specified in its charter) Ireland 001-37977 98-1341933 (State or other jurisdiction (Commission (IRS Empl

June 15, 2022 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ☒ Filed by a party other than

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ? Filed by a party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? ? Confidential, for Use of the Commission Only (as permi

June 15, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant x Filed by a party other than

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant x Filed by a party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e

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