Atomera Incorporated
US ˙ NasdaqCM ˙ US04965B1008

SecurityATOM / Atomera Incorporated
InstitutionNorthern Trust Corp
Latest Disclosed Ownership288,680 shares
Latest Disclosed Value $ 1,099,870
Northern Trust Corp reports 4.55% increase in ownership of ATOM / Atomera Incorporated

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 288,680 shares of Atomera Incorporated (US:ATOM) valued at $1,099,871 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 276,128 shares of Atomera Incorporated. This represents a change in shares of 4.55% during the quarter. The current value of the position is $2,626,988 USD.

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)
2026-05-14 2026-03-31 13F ATOMERA COM 04965B100 288,680 12,552 4.55 1,100 80.16 0.0000
2026-02-17 2025-12-31 13F ATOMERA COM 04965B100 276,128 -17,406 -5.93 610 -52.97 0.0001
2025-11-14 2025-09-30 13F ATOMERA COM 04965B100 293,534 -6,246 -2.08 1,297 -14.11 0.0002
2025-08-13 2025-06-30 13F ATOMERA COM 04965B100 299,780 231,240 337.38 1,511 451.09 0.0002
2025-05-13 2025-03-31 13F ATOMERA COM 04965B100 68,540 6,630 10.71 274 -61.84 0.0000
2025-02-14 2024-12-31 13F ATOMERA COM 04965B100 61,910 4,934 8.66 718 381.88 0.0001
2024-11-13 2024-09-30 13F ATOMERA COM 04965B100 56,976 -123,265 -68.39 150 -78.28 0.0000
2024-08-14 2024-06-30 13F ATOMERA COM 04965B100 180,241 -17,375 -8.79 687 -43.63 0.0001
2024-05-14 2024-03-31 13F ATOMERA COM 04965B100 197,616 975 0.50 1,217 -11.68 0.0002
2024-02-13 2023-12-31 13F ATOMERA COM 04965B100 196,641 5,750 3.01 1,378 15.41 0.0002
2023-11-13 2023-09-30 13F ATOMERA COM 04965B100 190,891 5,667 3.06 1,195 -26.48 0.0002
2023-08-11 2023-06-30 13F ATOMERA COM 04965B100 185,224 9,389 5.34 1,624 45.00 0.0003
2023-05-15 2023-03-31 13F ATOMERA COM 04965B100 175,835 4,185 2.44 1,120 4.97 0.0002
2023-02-13 2022-12-31 13F ATOMERA COM 04965B100 171,650 -3,265 -1.87 1,068 -39.79 0.0002
2022-11-14 2022-09-30 13F ATOMERA COM 04965B100 174,915 -272 -0.16 1,772 7.85 0.0004
2022-08-12 2022-06-30 13F ATOMERA COM 04965B100 175,187 -3,495 -1.96 1,643 -29.58 0.0004
2022-05-13 2022-03-31 13F ATOMERA COM 04965B100 178,682 -8,135 -4.35 2,333 -37.94 0.0004
2022-02-08 2021-12-31 13F ATOMERA COM 04965B100 186,817 -4,640 -2.42 3,759 -14.97 0.0006
2021-11-15 2021-09-30 13F ATOMERA COM 04965B100 191,457 -10,240 -5.08 4,421 2.22 0.0008
2021-08-13 2021-06-30 13F ATOMERA COM 04965B100 201,697 12,605 6.67 4,325 -6.65 0.0008
2021-05-12 2021-03-31 13F ATOMERA COM 04965B100 189,092 861 0.46 4,633 52.95 0.0009
2021-02-11 2020-12-31 13F ATOMERA COM 04965B100 188,231 7,728 4.28 3,029 60.60 0.0006
2020-11-16 2020-09-30 13F ATOMERA COM 04965B100 180,503 119,485 195.82 1,886 243.53 0.0004
2020-08-14 2020-06-30 13F ATOMERA COM 04965B100 61,018 36,318 147.04 549 538.37 0.0001
2020-05-14 2020-03-31 13F ATOMERA COM 04965B100 24,700 0 0.00 86 13.16 0.0000
2020-02-14 2019-12-31 13F ATOMERA COM 04965B100 24,700 0 0.00 76 -18.28 0.0000
2019-11-13 2019-09-30 13F ATOMERA COM 04965B100 24,700 0 0.00 93 -25.00 0.0000
2019-08-13 2019-06-30 13F ATOMERA COM 04965B100 24,700 0 0.00 124 90.77 0.0000
2019-05-13 2019-03-31 13F ATOMERA COM 04965B100 24,700 2,571 11.62 65 1.56 0.0000
2019-02-12 2018-12-31 13F ATOMERA COM 04965B100 22,129 0 0.00 64 -51.52 0.0000
2018-11-14 2018-09-30 13F ATOMERA COM 04965B100 22,129 0 0.00 132 -2.22 0.0000
2018-09-18 2018-06-30 13F/A-1 ATOMERA COM 04965B100 22,129 0 0.00 135 -2.17 0.0000
2018-08-14 2018-06-30 13F ATOMERA COM 04965B100 22,129 0 135
2018-05-09 2018-03-31 13F ATOMERA COM 04965B100 22,129 22,129 138 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.