ATNM Institutional Ownership
Top institutional (13F) holders of ATNM and activist (13D/G) positions, sourced from SEC EDGAR.
Institutional owners
20
Institutional value
$3.55B
Top holder
Vanguard Capital Management
Top holders
| Holder | Stake | Filed | Value |
|---|---|---|---|
| Vanguard Capital Managementinvestment advisor | 3.9% | Aug 13, 2026 | $1.21B |
| MILLENNIUM MANAGEMENT LLCinvestment advisor | 1.6% | Aug 14, 2026 | $504.29M |
| BlackRock, Inc.holding company | 1.3% | Aug 7, 2026 | $387.98M |
| RENAISSANCE TECHNOLOGIES LLCinvestment advisor | 1.2% | Aug 13, 2026 | $372.88M |
| GEODE CAPITAL MANAGEMENT, LLCinvestment advisor | 1.0% | Aug 12, 2026 | $318.55M |
| TWO SIGMA INVESTMENTS, LPinvestment advisor | 0.8% | Aug 14, 2026 | $254M |
| STATE STREET CORPORATIONinvestment advisor | 0.4% | Sep 22, 2026 | $119.77M |
| CITADEL ADVISORS LLCinvestment advisor | 0.3% | May 15, 2026 | $100.63M |
| GOLDMAN SACHS GROUP INCinvestment advisor | 0.2% | May 15, 2026 | $69.91M |
| NORTHERN TRUST CORPinvestment advisor | 0.2% | Aug 13, 2026 | $68.35M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLPinvestment advisor | 0.2% | Aug 14, 2026 | $55.69M |
| Dimensional Fund Advisors LPinvestment advisor | 0.1% | May 7, 2026 | $34.76M |
| WELLS FARGO & COMPANY/MNinvestment advisor | 0.1% | Aug 14, 2026 | $19.4M |
| JANE STREET GROUP, LLCholding company | 0.1% | Aug 14, 2026 | $19.11M |
| UBS Group AGinvestment advisor | 0.0% | Aug 13, 2026 | $6.62M |
| MORGAN STANLEYinvestment advisor | 0.0% | Aug 13, 2026 | $6.21M |
| JPMORGAN CHASE & COinvestment advisor | 0.0% | Aug 12, 2026 | $1.48M |
| CITIGROUP INCinvestment advisor | 0.0% | May 11, 2026 | $675K |
| FMR LLCinvestment advisor | 0.0% | May 15, 2026 | $79 |
| ROYAL BANK OF CANADAinvestment advisor | 0.0% | Aug 14, 2026 | $0 |
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Source: SEC EDGAR Schedule 13D / 13G and 13F filings.