Atomera Incorporated (ATOM) Ownership
ATOM ownership summary
as of October 17, 2026- Institutions
- 55.2% of shares outstanding
- Insiders
- 3.44% of shares outstanding
- Shares outstanding
- 39.0M
- Float
- 37.7M shares available to trade
- Short interest
- 16.59% 6.3M shares short
- Days to cover
- 14.86 short interest down 3.3% vs prior month
- Institutions 55.22%
- Insiders 3.44%
- Other investors 41.34%
ATOM top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.66% | 3.0M | $9.2M | +617,602 (+26.0%) | June 30, 2026 |
| 2 | D. E. Shaw & Co LP | 4.84% | 1.9M | $5.8M | +914,396 (+93.7%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 4.27% | 1.7M | $5.1M | +376,404 (+29.2%) | June 30, 2026 |
| 4 | Avenir Corporation | 3.76% | 1.5M | $4.5M | +7,245 (+0.5%) | June 30, 2026 |
| 5 | Baird Financial Group, Inc. | 3.44% | 1.3M | $4.1M | +63,208 (+4.9%) | June 30, 2026 |
| 6 | UBS Group AG | 3.41% | 1.3M | $4.1M | +1.2M (+655.6%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.54% | 990K | $3.1M | +220,673 (+28.7%) | June 30, 2026 |
| 8 | Jane Street Group LLC | 2.08% | 810K | $2.5M | +650,315 (+407.3%) | June 30, 2026 |
| 9 | Quantum Private Wealth, LLC | 1.91% | 744K | $2.3M | +145,586 (+24.3%) | June 30, 2026 |
| 10 | State Street Corp | 1.84% | 718K | $2.2M | +139,965 (+24.2%) | June 30, 2026 |
| 11 | Two Sigma Investments LLC | 1.71% | 668K | $2.1M | +137,667 (+26.0%) | June 30, 2026 |
| 12 | Defender Capital, LLC. | 1.52% | 594K | $1.8M | +299,000 (+101.2%) | September 30, 2026 |
| 13 | Hollencrest Securities, LLC | 1.47% | 573K | $1.8M | −23,933 (−4.0%) | June 30, 2026 |
| 14 | Vanguard Portfolio Management, LLC | 1.42% | 554K | $1.7M | +375,482 (+209.8%) | June 30, 2026 |
| 15 | Northern Trust Corp | 0.95% | 371K | $1.1M | +81,921 (+28.4%) | June 30, 2026 |
| 16 | Connor Clark & Lunn Inv Mgmt Ltd | 0.90% | 352K | $1.1M | +331,118 (+1,570.2%) | June 30, 2026 |
| 17 | Vanguard Fiduciary Trust Co | 0.70% | 275K | $846,877 | +58,568 (+27.1%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 0.70% | 274K | $845,134 | +2,792 (+1.0%) | June 30, 2026 |
| 19 | Marshall Wace Asset Management Ltd | 0.68% | 267K | $821,732 | −221,879 (−45.4%) | June 30, 2026 |
| 20 | Pathstone Holdings LLC | 0.64% | 251K | $772,787 | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 17 holders added 5.6M shares and 2 cut 246K.
ATOM top mutual fund and ETF holders
18 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.00% | 1.2M | $3.6M | — | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 2.60% | 1.0M | $3.1M | −11,712 (−1.1%) | September 30, 2026 |
| 3 | Fidelity Small Cap Index | 1.07% | 419K | $1.3M | +2,311 (+0.6%) | July 31, 2026 |
| 4 | iShares Russell 2000 Growth ETF | 0.94% | 368K | $1.1M | −466 (−0.1%) | September 30, 2026 |
| 5 | Vanguard Russell 2000 ETF | 0.56% | 220K | $676,513 | +4,320 (+2.0%) | August 31, 2026 |
| 6 | Fidelity Extended Market Index | 0.50% | 194K | $597,868 | +7,258 (+3.9%) | August 31, 2026 |
| 7 | Vanguard US Momentum Factor ETF | 0.34% | 134K | $411,337 | +133,551 (0.0%) | June 30, 2026 |
| 8 | Vanguard Explorer Inv | 0.33% | 127K | $391,908 | +127,243 (0.0%) | June 30, 2026 |
| 9 | iShares Micro-Cap ETF | 0.31% | 121K | $373,752 | −837 (−0.7%) | September 30, 2026 |
| 10 | Schwab Small Cap Index | 0.24% | 93K | $287,315 | — | August 31, 2026 |
| 11 | Stt Strt SPDR® Russell2000 US SmCapETF | 0.21% | 81K | $248,916 | +3,872 (+5.0%) | August 31, 2026 |
| 12 | Fidelity Total Market Index | 0.19% | 72K | $222,435 | +61 (+0.1%) | August 31, 2026 |
| 13 | Jacob Internet Inv | 0.18% | 72K | $221,760 | −28,000 (−28.0%) | June 30, 2026 |
| 14 | iShares Russell 2000 Small-Cap Idx Instl | 0.18% | 72K | $220,611 | — | August 31, 2026 |
| 15 | Fidelity Series Total Market Index | 0.16% | 62K | $190,064 | +3,249 (+5.6%) | August 31, 2026 |
| 16 | Nuveen Small Cap Blend Idx R6 | 0.13% | 51K | $156,276 | — | August 31, 2026 |
| 17 | EQ/2000 Managed Volatility IB | 0.11% | 43K | $131,100 | — | August 31, 2026 |
| 18 | Vanguard Russell 2000 Growth ETF | 0.11% | 41K | $126,918 | +200 (+0.5%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ATOM insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-02 | Francis Laurencio | Sell | $4.95 | 4,799 | $23,755 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ATOM shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ATOM
Institutional investors own 55.2% of Atomera's shares and insiders 3.44%. The largest holder is BlackRock Inc with 7.66% of the shares (3.0M), as of June 30, 2026. Among the top 20 institutions, 17 added shares and 2 reduced their stake in the latest filings. Short interest is 16.59% of the float, or 14.86 days of average trading volume. The share count rose 2,461.4% since 2014.
Related: ATOM analyst forecast, ATOM key metrics. See the ATOM stock overview for the latest quote and news.
ATOM ownership FAQ
Who owns the most Atomera stock?
The largest shareholders of Atomera are BlackRock Inc (7.66%), D. E. Shaw & Co LP (4.84%), Vanguard Capital Management, LLC (4.27%), Avenir Corporation (3.76%), Baird Financial Group, Inc. (3.44%).
What percentage of Atomera is owned by institutions?
Institutions hold 55.2% of Atomera's shares outstanding; insiders hold 3.44%.
Which funds own Atomera?
The largest fund holders of Atomera are Vanguard MStar Total Stk Mkt Idx Invest (3.00%), iShares Russell 2000 ETF (2.60%), Fidelity Small Cap Index (1.07%), iShares Russell 2000 Growth ETF (0.94%), Vanguard Russell 2000 ETF (0.56%).
What is Atomera's short interest?
6.3M shares of Atomera were sold short, 16.59% of the float; at the average daily volume it would take 14.86 days to cover.
Are insiders buying or selling Atomera?
Of the latest 1 reported insider transactions in Atomera (since March 2, 2026), 0 were purchases and 1 were sales.
How many shares of Atomera are outstanding?
Atomera has 39.0M shares outstanding, of which 37.7M are in the public float.