Who owns Atomera (ATOM)?
Atomera's largest shareholders, according to SEC filings, are BlackRock (7.7%), Vanguard (6.5%) and D. E. Shaw (4.8%). In all, 63 holders named in SEC filings declare between 41.4% and 58.7% of its shares, and 62 smaller fund managers another 0.94%. The largest individual shareholder is Scott A. Bibaud, CEO and President, with 1.7%.
Atomera's largest shareholders
| Holder | Filing | Shares | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|---|
| BlackRock | 13F | 3.0M | 7.7% | Jun 30, 2026 | Q4 2019 or earlier |
| Vanguard | 13F | 2.5M | 6.5% | Jun 30, 2026 | Q4 2019 or earlier |
| D. E. Shaw | 13F | 1.9M | 4.8% | Jun 30, 2026 | Q1 2025 |
| AVENIR CORP | 13F | 1.5M | 3.8% | Jun 30, 2026 | Q4 2019 or earlier |
| Baird Financial Group, Inc. | 13F | 1.3M | 3.4% | Jun 30, 2026 | Q4 2020 |
| UBS | 13F | 1.3M | 3.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Geode Capital | 13F | 990,370 | 2.5% | Jun 30, 2026 | Q4 2019 or earlier |
| Jane Street | 13F | 809,991 | 2.1% | Jun 30, 2026 | Q4 2023 |
| Quantum Private Wealth, LLC | 13F | 743,895 | 1.9% | Jun 30, 2026 | Q4 2021 |
| State Street | 13F | 717,862 | 1.8% | Jun 30, 2026 | Q2 2020 |
| Scott A. Bibaud | Form 4 | 682,005 | 1.7% | Sep 1, 2026 | — |
| Two Sigma | 13F | 667,667 | 1.7% | Jun 30, 2026 | Q2 2024 |
| Defender Capital, LLC. | 13F | 594,450 | 1.5% | Sep 30, 2026 | Q2 2026 |
| HOLLENCREST CAPITAL MANAGEMENT | 13F | 573,266 | 1.5% | Jun 30, 2026 | Q4 2019 or earlier |
| John Gerber | Form 4 | 534,857 | 1.4% | May 12, 2026 | — |
| Northern Trust | 13F | 370,601 | 0.95% | Jun 30, 2026 | Q4 2019 or earlier |
| Connor, Clark & Lunn Investment Management Ltd. | 13F | 352,205 | 0.90% | Jun 30, 2026 | Q1 2026 |
| Morgan Stanley | 13F | 274,394 | 0.70% | Jun 30, 2026 | Q4 2019 or earlier |
| Marshall Wace | 13F | 266,796 | 0.68% | Jun 30, 2026 | Q4 2025 |
| Robert J. Mears | Form 4 | 260,702 | 0.67% | Sep 2, 2026 | — |
| Pathstone Holdings, LLC | 13F | 250,905 | 0.64% | Jun 30, 2026 | Q4 2025 |
| Francis Laurencio | Form 4 | 246,849 | 0.63% | Sep 1, 2026 | — |
| Trexquant Investment LP | 13F | 225,139 | 0.58% | Jun 30, 2026 | Q2 2026 |
| Citadel | 13F | 221,842 | 0.57% | Jun 30, 2026 | Q1 2024 |
| Goldman Sachs | 13F | 178,193 | 0.46% | Jun 30, 2026 | Q4 2024 |
Atomera ownership breakdown
63 holders named in SEC filings declare between 41.4% and 58.7% of Atomera's shares outstanding, as of Sep 30, 2026. The largest are BlackRock (7.7%), Vanguard (6.5%) and D. E. Shaw (4.8%); the five largest hold 26.2% together. Another 62 institutions hold small positions worth 0.94%. At least 40.3% of the shares appear in no ownership filing: investors who do not have to report, mostly individuals. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 17.5% and sold 5.2% of the shares, a net purchase of 12.3%; 31 opened a position, 46 added, 23 reduced and 16 sold out. Biggest buyers: UBS (+1.2M shares) and D. E. Shaw (+914,396 shares). Biggest sellers: Citadel (-828,137) and Arosa Capital Management LP (-490,000). Directors and officers, from their latest Form 4: Scott A. Bibaud (1.7%), John Gerber (1.4%) and Robert J. Mears (0.67%). Over time, 113 managers declared Atomera in their 13F for Q2 2026, against 15 for Q4 2019: together at most 51.5% of the shares outstanding, against 17.8%.
Atomera institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 15 | 17.8% | $10.9M | 80.1% |
| Q4 2020 | 54 | 27.1% | $93.6M | 44.7% |
| Q4 2021 | 80 | 32.8% | $152.5M | 36.8% |
| Q4 2022 | 78 | 31.7% | $47.4M | 39.2% |
| Q4 2023 | 75 | 32.1% | $57.9M | 36.5% |
| Q4 2024 | 74 | 29.4% | $97.9M | 48.8% |
| Q4 2025 | 92 | 32.6% | $22.9M | 38.9% |
| Q2 2026 | 113 | 51.5% | $173.7M | 44.4% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.
Questions about Atomera's shareholders
Who is the largest shareholder of Atomera?
BlackRock, with 7.7% of Atomera's shares (3.0 million shares), according to its 13F filing for the quarter ended Jun 30, 2026.
What is Atomera's institutional ownership?
In their 13F filings for Q2 2026, 113 fund managers declared Atomera shares: at most 51.5% of the shares outstanding — an upper bound, since two managers can report the same shares. With large shareholders (Schedule 13D/G) and directors and officers (Form 4), 63 named holders declare between 41.4% and 58.7% of the shares.
How much of Atomera does Vanguard own?
Vanguard declared 2.5 million shares, 6.5% of Atomera's shares, in its 13F filing for the quarter ended Jun 30, 2026, up 2.18 percentage points from its previous filing (Mar 31, 2026).
How much of Atomera does D. E. Shaw own?
D. E. Shaw declared 1.9 million shares, 4.8% of Atomera's shares, in its 13F filing for the quarter ended Jun 30, 2026, up 2.34 percentage points from its previous filing (Mar 31, 2026).
How much Atomera stock does Scott A. Bibaud own?
Scott A. Bibaud, CEO and President, declared 682,005 shares, 1.7% of Atomera's shares, in the latest Form 4, dated Sep 1, 2026.
Who bought and sold Atomera stock last quarter?
From Mar 31, 2026 to Jun 30, 2026, fund managers that filed both quarters bought 17.5% of Atomera's shares and sold 5.2%: 31 opened a position and 16 sold out. Biggest buyers: UBS (+1.2 million shares), D. E. Shaw (+914,396 shares) and Vanguard (+841,578 shares). Biggest sellers: Citadel (−828,137 shares), Arosa Capital Management LP (−490,000 shares) and Marshall Wace (−221,879 shares).
How much of Atomera do individual investors own?
No filing says it directly: individual investors do not have to report their holdings. At least 40.3% of Atomera's shares appear in no ownership filing — retail investors, holders below the reporting thresholds and foreign funds.
Who owns the other AI companies? The largest shareholder of each, from SEC filings.