ATNM Institutional Ownership
Top institutional (13F) holders of ATNM and 5%+ (13D/G) positions, sourced from SEC EDGAR.
Institutional owners
20
Institutional value
$3.61M
Top holder
Vanguard Capital Management
Top holders
| Holder | Stake | Filed | Value |
|---|---|---|---|
| Vanguard Capital Managementinvestment advisor | 3.9% | Aug 13, 2026 | $1.21M |
| MILLENNIUM MANAGEMENT LLCinvestment advisor | 1.6% | Aug 14, 2026 | $504.3K |
| BlackRock, Inc.holding company | 1.3% | Aug 7, 2026 | $388K |
| RENAISSANCE TECHNOLOGIES LLCinvestment advisor | 1.2% | Aug 13, 2026 | $372.9K |
| GEODE CAPITAL MANAGEMENT, LLCinvestment advisor | 1.0% | Nov 6, 2026 | $364.1K |
| TWO SIGMA INVESTMENTS, LPinvestment advisor | 0.8% | Aug 14, 2026 | $254K |
| STATE STREET CORPORATIONholding company | 0.4% | Sep 22, 2026 | $119.8K |
| CITADEL ADVISORS LLCinvestment advisor | 0.3% | May 15, 2026 | $100.6K |
| GOLDMAN SACHS GROUP INCinvestment advisor | 0.2% | May 15, 2026 | $69.9K |
| NORTHERN TRUST CORPinvestment advisor | 0.2% | Aug 13, 2026 | $68.3K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLPinvestment advisor | 0.2% | Aug 14, 2026 | $55.7K |
| Dimensional Fund Advisors LPinvestment advisor | 0.1% | May 7, 2026 | $34.8K |
| WELLS FARGO & COMPANY/MNinvestment advisor | 0.1% | Aug 14, 2026 | $19.4K |
| JANE STREET GROUP, LLCholding company | 0.1% | Aug 14, 2026 | $19.1K |
| CITIGROUP INCinvestment advisor | 0.0% | Nov 4, 2026 | $9.8K |
| UBS Group AGbank | 0.0% | Aug 13, 2026 | $6.6K |
| MORGAN STANLEYholding company | 0.0% | Aug 13, 2026 | $6.2K |
| JPMORGAN CHASE & COholding company | 0.0% | Aug 12, 2026 | $1.5K |
| FMR LLCinvestment advisor | 0.0% | May 15, 2026 | $79 |
| ROYAL BANK OF CANADAholding company | 0.0% | Aug 14, 2026 | $0 |
5%+ holders
Current stakes of 5% or more from Schedule 13D and 13G filings. A joint filing shows once, under its lead filer.
No current 5%+ holders of ATNM on file.
Never miss a ATNM filing.
Get an email when ATNM files its next 8-K, Form 4, 10-K or 10-Q with the SEC. Free, no account needed.
Free foreverNo account requiredOne-click unsubscribe
Source: SEC EDGAR Schedule 13D / 13G and 13F filings.