Fastly, Inc.
MX ˙ BMV ˙ US31188V1008
SecurityMX:FSLY / Fastly, Inc.
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership176,843 shares
Latest Disclosed Value $ 5,139,058
Bnp Paribas Arbitrage, Sa ownership in FSLY / Fastly, Inc.

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 176,843 shares of Fastly, Inc. (MX:FSLY) valued at $5,139,058 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 320,167 shares of Fastly, Inc.. This represents a change in shares of -44.77% during the quarter.

Bnp Paribas Arbitrage, Sa has a history of taking positions in derivatives of the underlying security (FSLY) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:FSLY / Fastly, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F Fastly Equity 31188V100 176,843 -143,324 -44.77 5,139 57.69 0.0003
2026-02-10 2025-12-31 13F Fastly Equity 31188V100 320,167 -18,037 -5.33 3,259 12.73 0.0015
2025-11-13 2025-09-30 13F Fastly Equity 31188V100 338,204 152,057 81.69 2,892 120.02 0.0015
2025-08-14 2025-06-30 13F Fastly Equity 31188V100 186,147 -178,672 -48.98 1,314 -43.09 0.0008
2025-05-14 2025-03-31 13F Fastly Equity 31188V100 364,819 250,382 218.79 2,309 113.80 0.0014
2025-02-14 2024-12-31 13F Fastly Equity 31188V100 114,437 -123,315 -51.87 1,080 -39.97 0.0006
2024-11-13 2024-09-30 13F Fastly Equity 31188V100 237,752 -90,597 -27.59 1,800 -25.63 0.0012
2024-08-13 2024-06-30 13F Fastly Equity 31188V100 328,349 22,552 7.37 2,420 -39.01 0.0020
2024-05-01 2024-03-31 13F Fastly Equity 31188V100 305,797 32,687 11.97 3,966 -18.41 0.0035
2024-02-14 2023-12-31 13F/A-2 Fastly Equity 31188V100 273,110 34,564 14.49 4,861 6.32 0.0055
2024-02-07 2023-12-31 13F/A-1 Fastly Equity 31188V100 273,110 34,564 4,861 0.0007
2024-02-07 2023-12-31 13F Fastly Equity 31188V100 273,110 4,861
2023-11-14 2023-09-30 13F Fastly Equity 31188V100 238,546 -35,094 -12.82 4,573 5.96 0.0059
2023-08-09 2023-06-30 13F Fastly Equity 31188V100 273,640 -104,947 -27.72 4,315 -35.82 0.0054
2023-05-12 2023-03-31 13F FASTLY EQUITY 31188V100 378,587 -167,995 -30.74 6,724 50.20 0.0094
2023-02-14 2022-12-31 13F Fastly Equity 31188V100 546,582 -33,062 -5.70 4,477 -15.69 0.0069
2022-11-16 2022-09-30 13F/A-1 Fastly Equity 31188V100 579,644 162,089 38.82 5,310 9.53 0.0085
2022-11-15 2022-09-30 13F Fastly Equity 31188V100 579,644 162,089 5,310 0.0013
2022-08-12 2022-06-30 13F Fastly Equity 31188V100 417,555 -211,623 -33.63 4,848 -55.67 0.0076
2022-05-18 2022-03-31 13F/A-1 Fastly Equity 31188V100 629,178 320,580 103.88 10,935 -0.04 0.0147
2022-02-09 2021-12-31 13F FASTLY EQUITY 31188V100 308,598 618 0.20 10,940 -12.16 0.0156
2021-11-16 2021-09-30 13F/A-1 FASTLY EQUITY 31188V100 307,980 -273,135 -47.00 12,455 -64.04 0.0177
2021-11-12 2021-09-30 13F FASTLY EQUITY 31188V100 74,420 -506,695 6,972 0.0000
2021-08-10 2021-06-30 13F FASTLY EQUITY 31188V100 581,115 371,845 177.69 34,634 146.00 0.0458
2021-05-07 2021-03-31 13F FASTLY EQUITY 31188V100 209,270 80,874 62.99 14,080 25.51 0.0206
2021-02-10 2020-12-31 13F FASTLY EQUITY 31188V100 128,396 53,976 72.53 11,218 60.91 0.0209
2020-10-30 2020-09-30 13F FASTLY EQUITY 31188V100 74,420 44,570 149.31 6,972 174.34 0.0100
2020-08-06 2020-06-30 13F FASTLY EQUITY 31188V100 29,850 29,205 4,527.91 2,541 21,075.00 0.0045
2020-05-13 2020-03-31 13F FASTLY EQUITY 31188V100 645 38 6.26 12 0.00 0.0000
2020-02-12 2019-12-31 13F FASTLY EQUITY 31188V100 607 299 97.08 12 71.43 0.0000
2019-11-07 2019-09-30 13F FASTLY EQUITY 31188V100 308 286 1,300.00 7 -41.67 0.0000
2019-07-30 2019-06-30 13F FASTLY EQUITY 31188V100 22 22 0 0.0000
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-05-01 2024-03-31 13F Fastly Option Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-07 2023-12-31 13F/A Fastly Option Call 938 1,670 n/a n/a n/a
2024-02-14 2023-12-31 13F/A Fastly Option Call 938 27.10 1,670 18.03 n/a n/a n/a
2024-02-07 2023-12-31 13F Fastly Option Call 938 1,670 n/a n/a n/a
2023-11-14 2023-09-30 13F Fastly Option Call 738 0.00 1,415 21.58 n/a n/a n/a
2023-08-09 2023-06-30 13F Fastly Option Call 738 0.00 1,164 -11.22 n/a n/a n/a
2023-05-12 2023-03-31 13F FASTLY OPTION Call 738 1,311 n/a n/a n/a
2022-05-18 2022-03-31 13F/A FASTLY OPTION Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-17 2022-03-31 13F FASTLY OPTION Call 0 0 n/a n/a n/a
2022-02-09 2021-12-31 13F FASTLY OPTION Call 310 1,099 n/a n/a n/a
2021-11-16 2021-09-30 13F/A FASTLY OPTION Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-12 2021-09-30 13F FASTLY OPTION Call 0 0 n/a n/a n/a
2021-08-10 2021-06-30 13F FASTLY OPTION Call 1,609 9,590 n/a n/a n/a
2021-05-07 2021-03-31 13F FASTLY OPTION Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-10 2020-12-31 13F FASTLY OPTION Call 747 6,527 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2023-05-12 2023-03-31 13F Fastly Option Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F Fastly Option Put 250 0.00 205 -10.92 n/a n/a n/a
2022-11-16 2022-09-30 13F/A Fastly Option Put 250 0.00 229 -21.03 n/a n/a n/a
2022-11-15 2022-09-30 13F Fastly Option Put 250 229 n/a n/a n/a
2022-08-12 2022-06-30 13F Fastly Option Put 250 -36.22 290 -57.42 n/a n/a n/a
2022-05-18 2022-03-31 13F/A Fastly Option Put 392 -82.75 681 -91.55 n/a n/a n/a
2022-02-09 2021-12-31 13F FASTLY OPTION Put 2,273 89.42 8,058 66.06 n/a n/a n/a
2021-11-16 2021-09-30 13F/A FASTLY OPTION Put 1,200 -79.90 4,853 -86.37 n/a n/a n/a
2021-08-10 2021-06-30 13F FASTLY OPTION Put 5,971 818.62 35,587 713.79 n/a n/a n/a
2021-05-07 2021-03-31 13F FASTLY OPTION Put 650 -68.93 4,373 -76.07 n/a n/a n/a
2021-02-10 2020-12-31 13F FASTLY OPTION Put 2,092 18,278 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.