Review the latest institutional ownership data for ATOM based on recent 13F filings. Holdings Channel tracks 108 institutional holders of ATOM across the most recent two holding periods in our 13F database.
The table below shows the top 50 institutional holders of ATOM by reported position size, including share amounts, position values, and the filing period for each holder. Holder names link to each institution’s 13F portfolio page.
ATOM institutional holders summary
- Security: ATOM
- Institutional holders tracked: 108
- Largest reported holder shown: BlackRock Inc.
- Table includes: holder name, share amount, position value, and filing period
- Source: recent institutional 13F filings
| Holder | Amount | Position Size ($ in 1000's) | As of |
|---|---|---|---|
 BlackRock Inc. | 2,372,844 | $9,041 | 03/31/2026 |
| ATOM | 2,372,844 | $9,041 | 03/31/2026 |
| Avenir Corp | 1,461,415 | $5,568 | 03/31/2026 |
| ATOM | 1,461,415 | $5,568 | 03/31/2026 |
| Vanguard Capital Management LLC | 1,288,161 | $4,908 | 03/31/2026 |
| ATOM | 1,288,161 | $4,908 | 03/31/2026 |
| Baird Financial Group Inc. | 1,277,680 | $4,868 | 03/31/2026 |
| ATOM | 1,277,680 | $4,868 | 03/31/2026 |
 Citadel Advisors LLC | $3,769 | 03/31/2026 | |
| ATOM | 1,049,979 | $4,000 | 03/31/2026 |
| Put | 79,500 | $303 | 03/31/2026 |
| Call | 18,900 | $72 | 03/31/2026 |
| D. E. Shaw & Co. Inc. | 975,623 | $3,717 | 03/31/2026 |
| ATOM | 975,623 | $3,717 | 03/31/2026 |
| Geode Capital Management LLC | 769,697 | $2,933 | 03/31/2026 |
| ATOM | 769,697 | $2,933 | 03/31/2026 |
| Defender Capital LLC. | 295,450 | $2,573 | 06/30/2026 |
| ATOM | 295,450 | $2,573 | 06/30/2026 |
| Quantum Private Wealth LLC | 598,309 | $2,280 | 03/31/2026 |
| ATOM | 598,309 | $2,280 | 03/31/2026 |
| Hollencrest Capital Management | 597,199 | $2,275 | 03/31/2026 |
| ATOM | 597,199 | $2,275 | 03/31/2026 |
| State Street Corp | 577,897 | $2,202 | 03/31/2026 |
| ATOM | 577,897 | $2,202 | 03/31/2026 |
| Two Sigma Investments LP | 530,000 | $2,019 | 03/31/2026 |
| ATOM | 530,000 | $2,019 | 03/31/2026 |
| Arosa Capital Management LP | 490,000 | $1,867 | 03/31/2026 |
| ATOM | 490,000 | $1,867 | 03/31/2026 |
| Marshall Wace LLP | 488,675 | $1,862 | 03/31/2026 |
| ATOM | 488,675 | $1,862 | 03/31/2026 |
| Susquehanna International Group LLP | $1,201 | 03/31/2026 | |
| Call | 375,300 | $1,430 | 03/31/2026 |
| Put | 71,200 | $271 | 03/31/2026 |
| ATOM | 11,093 | $42 | 03/31/2026 |
| Northern Trust Corp | 288,680 | $1,100 | 03/31/2026 |
| ATOM | 288,680 | $1,100 | 03/31/2026 |
| Morgan Stanley | 271,602 | $1,035 | 03/31/2026 |
| ATOM | 271,602 | $1,035 | 03/31/2026 |
| Pathstone Holdings LLC | 250,905 | $956 | 03/31/2026 |
| ATOM | 250,905 | $956 | 03/31/2026 |
| Vanguard Fiduciary Trust Co. | 216,392 | $824 | 03/31/2026 |
| ATOM | 216,392 | $824 | 03/31/2026 |
| Goldman Sachs Group Inc. | 197,693 | $753 | 03/31/2026 |
| ATOM | 197,693 | $753 | 03/31/2026 |
| Vanguard Portfolio Management LLC | 178,970 | $682 | 03/31/2026 |
| ATOM | 178,970 | $682 | 03/31/2026 |
| UBS Group AG | 175,861 | $670 | 03/31/2026 |
| ATOM | 175,861 | $670 | 03/31/2026 |
| Sargent Investment Group LLC | 175,900 | $670 | 03/31/2026 |
| ATOM | 175,900 | $670 | 03/31/2026 |
| Renaissance Technologies LLC | 163,066 | $621 | 03/31/2026 |
| ATOM | 163,066 | $621 | 03/31/2026 |
| Westside Investment Management Inc. | 150,877 | $575 | 03/31/2026 |
| ATOM | 150,877 | $575 | 03/31/2026 |
| Jane Street Group LLC | $563 | 03/31/2026 | |
| ATOM | 159,676 | $608 | 03/31/2026 |
| Put | 11,900 | $45 | 03/31/2026 |
| AQR Capital Management LLC | 123,545 | $471 | 03/31/2026 |
| ATOM | 123,545 | $471 | 03/31/2026 |
| Brown Advisory Inc. | 100,243 | $382 | 03/31/2026 |
| ATOM | 100,243 | $382 | 03/31/2026 |
| Group One Trading L.P. | $378 | 03/31/2026 | |
| ATOM | 83,116 | $317 | 03/31/2026 |
| Call | 26,400 | $101 | 03/31/2026 |
| Put | 10,400 | $40 | 03/31/2026 |
| Charles Schwab Investment Management Inc. | 86,200 | $328 | 03/31/2026 |
| ATOM | 86,200 | $328 | 03/31/2026 |
| Bank of New York Mellon Corp | 70,629 | $269 | 03/31/2026 |
| ATOM | 70,629 | $269 | 03/31/2026 |
| FMR LLC | 63,771 | $243 | 03/31/2026 |
| ATOM | 63,771 | $243 | 03/31/2026 |
| Simplex Trading LLC | $236 | 03/31/2026 | |
| Call | 65,900 | $251 | 03/31/2026 |
| Put | 4,400 | $17 | 03/31/2026 |
| ATOM | 648 | $2 | 03/31/2026 |
| Nuveen LLC | 60,813 | $232 | 03/31/2026 |
| ATOM | 60,813 | $232 | 03/31/2026 |
| Commonwealth Equity Services LLC | 56,922 | $217 | 03/31/2026 |
| ATOM | 56,922 | $217 | 03/31/2026 |
| Price T Rowe Associates Inc. MD | 54,044 | $206 | 03/31/2026 |
| ATOM | 54,044 | $206 | 03/31/2026 |
| PCM Encore LLC | 52,260 | $199 | 03/31/2026 |
| ATOM | 52,260 | $199 | 03/31/2026 |
| Bank of America Corp DE | 46,301 | $176 | 03/31/2026 |
| ATOM | 46,301 | $176 | 03/31/2026 |
| Channel Wealth LLC | 38,500 | $147 | 03/31/2026 |
| ATOM | 38,500 | $147 | 03/31/2026 |
| Rhumbline Advisers | 35,335 | $135 | 03/31/2026 |
| ATOM | 35,335 | $135 | 03/31/2026 |
| Alliancebernstein L.P. | 27,200 | $104 | 03/31/2026 |
| ATOM | 27,200 | $104 | 03/31/2026 |
| Virtu Financial LLC | 25,449 | $97 | 03/31/2026 |
| ATOM | 25,449 | $97 | 03/31/2026 |
| Deutsche Bank AG | 24,329 | $93 | 03/31/2026 |
| ATOM | 24,329 | $93 | 03/31/2026 |
| Mirabella Financial Services LLP | 23,082 | $88 | 03/31/2026 |
| ATOM | 23,082 | $88 | 03/31/2026 |
| SRS Capital Advisors Inc. | 21,797 | $83 | 03/31/2026 |
| ATOM | 21,797 | $83 | 03/31/2026 |
| Connor Clark & Lunn Investment Management Ltd. | 21,087 | $80 | 03/31/2026 |
| ATOM | 21,087 | $80 | 03/31/2026 |
| Advisory Research Inc. | 20,000 | $76 | 03/31/2026 |
| ATOM | 20,000 | $76 | 03/31/2026 |
| New York State Common Retirement Fund | 19,300 | $74 | 03/31/2026 |
| ATOM | 19,300 | $74 | 03/31/2026 |
| HighTower Advisors LLC | 19,371 | $74 | 03/31/2026 |
| ATOM | 19,371 | $74 | 03/31/2026 |
| LPL Financial LLC | 18,635 | $71 | 03/31/2026 |
| ATOM | 18,635 | $71 | 03/31/2026 |
