ACTINIUM PHARMACEUTICALS INC (ATNM) Institutional Ownership and Insiders Activity
ACTINIUM PHARMACEUTICALS INC (ATNM) is widely held by institutional investors, with 43 firms reporting positions valued at approximately $4.60M based on SEC Form 13F filings for the quarter ended June 30, 2026.
Vanguard Capital Management Llc is the largest disclosed holder, reporting approximately $1.21M in ATNM holdings in its latest filing.
Recent insider activity includes 8 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.
Institutional Holders
43
Total Reported Value
$4.60M
Largest Holder
Vanguard Capital Management Llc
Largest Position
$1.21M
Insider Transactions (90d)
8
Latest Filing Quarter
Q2 2026
New Institutional Positions
57
Funds Exiting Positions
0
Top Institutional Owners
View allInvestorReported Balance
- Vanguard Capital Management Llc$1.21M
- Millennium Management Llc$504,288
- Acadian Asset Management Llc$485,000
- Blackrock, Inc.$387,978
- Renaissance Technologies LLC$372,881
Related ATNM Institutional Insights:
- ATNM 13F Institutional Holders
- ATNM Superinvestors
- ATNM Institutional Ownership Changes
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- ATNM Insider Trading & SEC Form 4 Activity
- ATNM Articles
- Top Institutional Investor Stock Rankings