Atomera Incorporated
US ˙ NasdaqCM ˙ US04965B1008

SecurityATOM / Atomera Incorporated
InstitutionVanguard Group Inc
Latest Disclosed Ownership0 shares
Ownership 0.00%
Vanguard Group Inc ownership in ATOM / Atomera Incorporated

2026-03-26 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of Atomera Incorporated (US:ATOM). This represents 0.0 percent ownership of the company. In their previous filing dated 2025-07-29 , Vanguard Group Inc had reported owning 1,620,488 shares, indicating a decrease of -100.00 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-03-26 2026-03-26 13G/A 1,620,488 0 -100.00 0.00 -100.00
2025-07-29 2025-07-29 13G 1,201,276 1,620,488 34.90 5.27 21.99
2024-11-12 2024-11-12 13G/A 1,201,276 1,201,276 0.00 4.32 0.00
2024-11-04 2024-11-04 13G/A 1,385,368 1,201,276 -13.29 4.32 -19.55
2024-11-04 2024-11-04 13G/A 1,385,368 1,201,276 -13.29 4.32 -19.55
2024-11-04 2024-11-04 13G/A 1,385,368 1,201,276 -13.29 4.32 -19.55
2024-02-13 2024-02-13 13G 1,385,368 5.37

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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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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)
2026-01-29 2025-12-31 13F ATOMERA COM 04965B100 1,645,828 9,890 0.60 3,637 -49.70 0.0001
2025-11-07 2025-09-30 13F ATOMERA COM 04965B100 1,635,938 15,450 0.95 7,231 -11.47 0.0001
2025-08-11 2025-06-30 13F ATOMERA COM 04965B100 1,620,488 322,277 24.82 8,167 57.30 0.0001
2025-05-09 2025-03-31 13F ATOMERA COM 04965B100 1,298,211 58,180 4.69 5,193 -63.90 0.0001
2025-02-11 2024-12-31 13F ATOMERA COM 04965B100 1,240,031 38,755 3.23 14,384 355.33 0.0003
2024-11-13 2024-09-30 13F ATOMERA COM 04965B100 1,201,276 0 0.00 3,159 -30.97 0.0001
2024-08-13 2024-06-30 13F ATOMERA COM 04965B100 1,201,276 -109,747 -8.37 4,577 -43.33 0.0001
2024-05-10 2024-03-31 13F ATOMERA COM 04965B100 1,311,023 -74,345 -5.37 8,076 -16.85 0.0002
2024-03-11 2023-12-31 13F/A-1 ATOMERA COM 04965B100 1,385,368 63,840 4.83 9,711 17.40 0.0002
2024-02-14 2023-12-31 13F ATOMERA COM 04965B100 1,385,368 63,840 9,711 0.0002
2023-12-18 2023-09-30 13F/A-1 ATOMERA COM 04965B100 1,321,528 1,257 0.10 8,273 -28.55 0.0002
2023-11-14 2023-09-30 13F ATOMERA COM 04965B100 1,321,528 1,257 8,273 0.0000
2023-08-14 2023-06-30 13F ATOMERA COM 04965B100 1,320,271 7,362 0.56 11,579 38.44 0.0003
2023-07-14 2023-03-31 13F/A-1 ATOMERA COM 04965B100 1,312,909 132,253 11.20 8,363 13.89 0.0002
2023-05-15 2023-03-31 13F ATOMERA COM 04965B100 1,312,909 132,253 8,363 0.0000
2023-02-10 2022-12-31 13F ATOMERA COM 04965B100 1,180,656 60,454 5.40 7,344 -35.29 0.0002
2022-11-14 2022-09-30 13F ATOMERA COM 04965B100 1,120,202 41,992 3.89 11,348 12.21 0.0003
2022-08-12 2022-06-30 13F ATOMERA COM 04965B100 1,078,210 -28,621 -2.59 10,113 -30.04 0.0003
2022-05-13 2022-03-31 13F ATOMERA COM 04965B100 1,106,831 61,241 5.86 14,455 -31.29 0.0003
2022-02-14 2021-12-31 13F ATOMERA COM 04965B100 1,045,590 64,033 6.52 21,037 -7.18 0.0005
2021-11-12 2021-09-30 13F ATOMERA COM 04965B100 981,557 16,837 1.75 22,665 9.58 0.0006
2021-08-13 2021-06-30 13F ATOMERA COM 04965B100 964,720 76,396 8.60 20,684 -4.96 0.0005
2021-05-14 2021-03-31 13F ATOMERA COM 04965B100 888,324 38,761 4.56 21,764 59.22 0.0006
2021-02-12 2020-12-31 13F ATOMERA COM 04965B100 849,563 92,627 12.24 13,669 72.78 0.0004
2020-11-16 2020-09-30 13F ATOMERA COM 04965B100 756,936 120,026 18.85 7,911 37.99 0.0003
2020-08-14 2020-06-30 13F ATOMERA COM 04965B100 636,910 124,735 24.35 5,733 219.92 0.0002
2020-05-15 2020-03-31 13F ATOMERA COM 04965B100 512,175 20,133 4.09 1,792 18.21 0.0001
2020-02-14 2019-12-31 13F ATOMERA COM 04965B100 492,042 173 0.04 1,516 -18.27 0.0001
2019-11-14 2019-09-30 13F ATOMERA COM 04965B100 491,869 63,452 14.81 1,855 -13.92 0.0001
2019-08-14 2019-06-30 13F ATOMERA COM 04965B100 428,417 -2,000 -0.46 2,155 84.82 0.0001
2019-05-15 2019-03-31 13F ATOMERA COM 04965B100 430,417 1,058 0.25 1,166 -5.43 0.0000
2019-02-14 2018-12-31 13F ATOMERA COM 04965B100 429,359 76,364 21.63 1,233 -41.56 0.0001
2018-12-13 2018-09-30 13F/A-2 ATOMERA COM 04965B100 352,995 600 0.17 2,110 -2.18 0.0001
2018-11-23 2018-09-30 13F/A-1 ATOMERA COM 04965B100 352,995 0 2,110 0.0001
2018-11-14 2018-09-30 13F ATOMERA COM 04965B100 352,995 600 2,110
2018-08-14 2018-06-30 13F ATOMERA COM 04965B100 352,395 5,992 1.73 2,157 -0.23 0.0001
2018-05-15 2018-03-31 13F ATOMERA COM 04965B100 346,403 98,644 39.81 2,162 101.49 0.0001
2018-02-14 2017-12-31 13F ATOMERA COM 04965B100 247,759 3,827 1.57 1,073 13.07 0.0000
2017-11-14 2017-09-30 13F ATOMERA COM 04965B100 243,932 21,640 9.73 949 -0.94 0.0000
2017-08-24 2017-06-30 13F/A-1 ATOMERA COM 04965B100 222,292 86,101 63.22 958 -0.62 0.0000
2017-08-11 2017-06-30 13F ATOMERA COM 04965B100 222,292 86,101 958
2017-05-12 2017-03-31 13F ATOMERA COM 04965B100 136,191 136,191 964 0.0000
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.