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Actinium Pharmaceuticals
ATNM

60 hedge funds and large institutions have $7.36M invested in Actinium Pharmaceuticals in 2025 Q4 according to their latest regulatory filings, with 9 funds opening new positions, 13 increasing their positions, 19 reducing their positions, and 8 closing their positions.

New
Increased
Maintained
Reduced
Closed

13% more first-time investments, than exits

New positions opened: 9 | Existing positions closed: 8

0.84% more ownership

Funds ownership: 16.5% → 17.34% (+0.84%)

2% less funds holding

Funds holding: 61 → 60 (-1)

11% less capital invested

Capital invested by funds: $8.23M → $7.36M (-$878K)

32% less repeat investments, than reductions

Existing positions increased: 13 | Existing positions reduced: 19

Holders
60
Holders Change
-1
Holders Change %
-1.64%
% of All Funds
0.73%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
9
Increased
13
Reduced
19
Closed
8
Calls
$219K
Puts
–
Net Calls
+$219K
Net Calls Change
+$107K

Top Buyers

Rank Fund Capital Flow
1
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$170K
2
Renaissance Technologies
Renaissance Technologies
New York
+$149K
3
Goldman Sachs
Goldman Sachs
New York
+$103K
4
Squarepoint
Squarepoint
New York
+$95.9K
5
B
Bailard
California
+$84.4K

Top Sellers

Rank Fund Capital Flow
1
Citadel Advisors
Citadel Advisors
Florida
-$185K
2
Marshall Wace
Marshall Wace
United Kingdom
-$42.1K
3
Two Sigma Investments
Two Sigma Investments
New York
-$35.9K
4
GS
Gagnon Securities
New York
-$35.7K
5
Millennium Management
Millennium Management
New York
-$33.7K
Name Holding Trade Value Shares
Change 		Change in
Stake
Jones Financial Companies
51
Jones Financial Companies
Missouri
$477 – – –
PAI
52
Pittenger & Anderson Inc
Nebraska
$464 – – –
IRC
53
Investors Research Corp
Georgia
$408 – – –
BNP Paribas Financial Markets
54
BNP Paribas Financial Markets
France
$322 – – –
Northwestern Mutual Wealth Management
55
Northwestern Mutual Wealth Management
Wisconsin
$146 – – –
UBS Group
56
UBS Group
Switzerland
$131 -$21.1K -14,480 -99%
EWA
57
EverSource Wealth Advisors
Alabama
$22 -$102 -70 -81%
EP
58
Essential Partners
California
$5 -$71 -49 -92%
Barclays
59
Barclays
United Kingdom
$1 -$4 -3 -75%
Citadel Advisors
60
Citadel Advisors
Florida
– -$185K -126,615 Closed
Marshall Wace
61
Marshall Wace
United Kingdom
– -$42.1K -26,336 Closed
AQR Capital Management
62
AQR Capital Management
Connecticut
– -$26.9K -16,805 Closed
Royal Bank of Canada
63
Royal Bank of Canada
Ontario, Canada
– -$8.22K -5,637 -99%
ASN
64
Advisory Services Network
Georgia
– -$3.94K -2,460 Closed
TRCT
65
Tower Research Capital (TRC)
New York
– -$888 -555 Closed
Group One Trading
66
Group One Trading
Illinois
– -$798 -547 Closed
GLF
67
Groupe la Francaise
France
– -$436 -316 Closed
TWD
68
True Wealth Design
Ohio
– -$4 -2 Closed
1 2
3

ATNM Hedge Fund Activity: Q4 2025 in Review

60 of the 8,228 institutional investors tracked by Wall St. Rank reported a position in Actinium Pharmaceuticals (ATNM) for Q4 2025, worth a combined $7.36M — down 11% from $8.23M a quarter earlier.

Buyers outnumbered sellers: 9 funds opened new ATNM positions and 8 closed out — a net gain of 1 holder — while 13 added to existing stakes and 19 trimmed.

The largest buyer was Acadian Asset Management, adding an estimated $170K. The largest seller was Citadel Advisors, exiting entirely with an estimated $185K sold.

  • 60 institutional investors held Actinium Pharmaceuticals (ATNM) as of Q4 2025, down from 61 in Q3 2025.
  • Funds reported $7.36M of Actinium Pharmaceuticals stock for Q4 2025, down 11% quarter-over-quarter.
  • 9 funds opened new Actinium Pharmaceuticals positions in Q4 2025 and 8 closed out, a net change of +1 holder.
  • The largest Actinium Pharmaceuticals buyer in Q4 2025 was Acadian Asset Management, an estimated $170K added.
  • The largest Actinium Pharmaceuticals seller in Q4 2025 was Citadel Advisors, an estimated $185K sold.

Based on aggregated 13F filings for Q4 2025.