Atomera Incorporated
Atomera Incorporated (ATOM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ATOM · as of Sep 30, 2025
Ownership Breakdown
90
Institutional Holders
▼ 7 vs Q2
$46.78M
Total Inst. Value
▼ $9.62M vs Q2
32.50M
Shares Outstanding
freeFloat 94.43%
10.59M
13F Shares Held
▼ 636,324 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ATOM largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. semiconductors & related devices | 1.90M | 6.24% | 6.24% | $8.38B | Nov 12, 2025 | ▲ 175.7K |
VANGUARD GROUP INC semiconductors & related devices | 1.64M | 5.38% | 5.38% | $7.23B | Nov 7, 2025 | ▲ 15.4K |
BAIRD FINANCIAL GROUP, INC. semiconductors & related devices | 975.7K | 3.21% | 3.21% | $4.31B | Nov 13, 2025 | ▼ 36.3K |
GEODE CAPITAL MANAGEMENT, LLC semiconductors & related devices | 723.3K | 2.38% | 2.38% | $3.20B | Nov 12, 2025 | ▲ 3.8K |
AVENIR CORP semiconductors & related devices | 604.4K | 1.99% | 1.99% | $2.67B | Nov 14, 2025 | ▲ 29.6K |
HOLLENCREST CAPITAL MANAGEMENT semiconductors & related devices | 599.1K | 1.97% | 1.97% | $2.65B | Nov 3, 2025 | ▼ 34.1K |
QUANTUM PRIVATE WEALTH, LLC semiconductors & related devices | 527.1K | 1.73% | 1.73% | $2.33B | Nov 10, 2025 | ▲ 38.8K |
STATE STREET CORP semiconductors & related devices | 446.6K | 1.47% | 1.47% | $1.97B | Nov 14, 2025 | ▲ 111.3K |
NORTHERN TRUST CORP semiconductors & related devices | 293.5K | 96.57% | 96.57% | $1.30B | Nov 14, 2025 | ▼ 6.2K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP semiconductors & related devices | 275.3K | 90.56% | 90.56% | $1.22B | Nov 14, 2025 | ▼ 24.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
17
Increased
+684.5K shares5
New Positions
first time holders22
Decreased
−990.7K shares0
Sold Out
fully exitedNet shares change (top 50)
306.2K
+684.5K / −990.7K
Net new holders
+0
5 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ATOM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
4
Buy transactions
12
Sell transactions
0.33
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
BIBAUD SCOTT A. CEO and President | Jun 1, 2026 | Sale | 4,589 | $9.52 | $43.7K | 705.2K | Form 4 ↗ |
BIBAUD SCOTT A. CEO and President | Jun 1, 2026 | Sale | 5,534 | $9.52 | $52.7K | 699.6K | Form 4 ↗ |
BIBAUD SCOTT A. CEO and President | Jun 1, 2026 | Sale | 2,020 | $9.52 | $19.2K | 697.6K | Form 4 ↗ |
BIBAUD SCOTT A. CEO and President | Jun 1, 2026 | Sale | 1,837 | $9.52 | $17.5K | 695.8K | Form 4 ↗ |
Mears Robert J Chief Technology Officer | Jun 1, 2026 | Sale | 783 | $9.52 | $7.5K | 282.6K | Form 4 ↗ |
Mears Robert J Chief Technology Officer | Jun 1, 2026 | Sale | 2,227 | $9.52 | $21.2K | 280.4K | Form 4 ↗ |
Mears Robert J Chief Technology Officer | Jun 1, 2026 | Sale | 1,539 | $9.52 | $14.7K | 278.9K | Form 4 ↗ |
Mears Robert J Chief Technology Officer | Jun 1, 2026 | Sale | 904 | $9.51 | $8.6K | 277.9K | Form 4 ↗ |
Laurencio Francis CFO | Jun 1, 2026 | Sale | 899 | $9.51 | $8.5K | 259.1K | Form 4 ↗ |
Laurencio Francis CFO | Jun 1, 2026 | Sale | 2,555 | $9.52 | $24.3K | 256.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Atomera Incorporated (ATOM) is primarily owned by institutional investors, who hold approximately 32.6% of total shares outstanding. Company insiders own approximately 5.57%, while retail and public investors account for the remaining 61.86%.
The largest institutional shareholder of Atomera Incorporated is BLACKROCK, INC., holding approximately 1.90 million shares — equal to 6.24% of outstanding shares — as of September 30, 2025.
A total of 90 institutional investors currently hold ATOM stock, with a combined institutional value of approximately $46,782,911 as of the most recent 13F filing period.
Frequently asked questions
ATOM ownershipAtomera Incorporated (ATOM) is primarily owned by institutional investors, who hold approximately 32.6% of shares. The largest shareholder is BLACKROCK, INC. with a 6.24% stake. Company insiders hold 5.57%. Data sourced from SEC Form 13F as of September 30, 2025.