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ATNM Institutional Ownership

Top institutional (13F) holders of ATNM and activist (13D/G) positions, sourced from SEC EDGAR.

Institutional owners
21
Institutional value
$3.55B
Top holder
Vanguard Capital Management

Top holders

HolderFiledValue
Vanguard Capital Managementhedge fundAug 13, 2026$1.21B
MILLENNIUM MANAGEMENT LLCinvestment advisorAug 14, 2026$504.29M
BlackRock, Inc.holding companyAug 7, 2026$387.98M
RENAISSANCE TECHNOLOGIES LLCinvestment advisorAug 13, 2026$372.88M
GEODE CAPITAL MANAGEMENT, LLCinvestment advisorAug 12, 2026$318.55M
TWO SIGMA INVESTMENTS, LPinvestment advisorAug 14, 2026$254.00M
STATE STREET CORPinvestment advisorAug 7, 2026$119.77M
CITADEL ADVISORS LLCinvestment advisorMay 15, 2026$100.63M
GOLDMAN SACHS GROUP INCinvestment advisorMay 15, 2026$69.91M
NORTHERN TRUST CORPinvestment advisorAug 13, 2026$68.35M
SUSQUEHANNA INTERNATIONAL GROUP, LLPinvestment advisorAug 14, 2026$55.69M
Dimensional Fund Advisors LPhedge fundMay 7, 2026$34.76M
WELLS FARGO & COMPANY/MNinvestment advisorAug 14, 2026$19.40M
JANE STREET GROUP, LLCholding companyAug 14, 2026$19.11M
UBS Group AGinvestment advisorAug 13, 2026$6.62M
MORGAN STANLEYinvestment advisorAug 13, 2026$6.21M
JPMORGAN CHASE & COinvestment advisorAug 12, 2026$1.48M
CITIGROUP INCinvestment advisorMay 11, 2026$675.0K
Point72 Asset Management, L.P.investment advisorFeb 17, 2026$14.0K
FMR LLCinvestment advisorMay 15, 2026$79
ROYAL BANK OF CANADAinvestment advisorAug 14, 2026$0

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Source: SEC EDGAR Schedule 13D / 13G and 13F filings.