ATNM · Actinium Pharmaceuticals, Inc. · Holdings

$1.31 +0.00 (+0.00%)

Market Cap

$38.67M

31.44M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 48

Total Value: $5,204,044

Total Shares: 5,310,269

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 48 13F filers · Δ vs Mar 31, 2026

Top Holder

23.3%

+0.2 pts

Top 5

61.1%

+1.0 pts

Top 10

85.8%

+4.2 pts

HHI

1,059

Broadly held+45

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -7

Institutional value: -3.7%

Shares held: -2.2%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega Qube Research & Technologies Ltd	+39,764	57,812
Mega BlackRock, Inc.	+24,686	395,896
Large Vontobel Holding Ltd.	+20,000	50,000
Large NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	+1,550	1,657
Mega VANGUARD FIDUCIARY TRUST CO	+1,261	161,526

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Large ACADIAN ASSET MANAGEMENT LLC	−104,531	496,288
Large RENAISSANCE TECHNOLOGIES LLC	−91,109	380,491
Mega TWO SIGMA INVESTMENTS, LP	−77,989	259,179
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	−67,176	56,822
Mega MILLENNIUM MANAGEMENT LLC	−50,020	514,580

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Small COMPASS FINANCIAL MANAGEMENT LLC	600,230	$588,225
Mid SNS Financial Group, LLC	43,000	$42,140
Mid HARBOUR INVESTMENTS, INC.	334	$327
Micro Allied Private Wealth LLC	240	$235
Mega BARCLAYS PLC	203	$198

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega CITADEL ADVISORS LLC	101,100	$100,594
Mega GOLDMAN SACHS GROUP INC	70,241	$69,889
Small TWO SIGMA SECURITIES, LLC	35,887	$35,707
Small NINE MASTS CAPITAL Ltd	35,227	$35,050
Mega DIMENSIONAL FUND ADVISORS LP	34,923	$34,748

Filter: New 6 Increased 6 Reduced 21 Sold out 13 Unchanged 15

Showing 48 of 48

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

VANGUARD CAPITAL MANAGEMENT LLC

$1,213,535

23.32%

1,238,302

COMPASS FINANCIAL MANAGEMENT LLC

$588,225

11.30%

600,230

MILLENNIUM MANAGEMENT LLC

$504,288

9.69%

514,580

ACADIAN ASSET MANAGEMENT LLC

$486,362

9.35%

496,288

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	496,288	$486,362	100.0%	Defined

BlackRock, Inc.

$387,977

7.46%

395,896

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	5,929	$5,810	1.5%	Sole
BlackRock Fund Advisors	106,723	$104,588	27.0%	Sole
BlackRock Institutional Trust Company, N.A.	283,244	$277,579	71.5%	Sole

RENAISSANCE TECHNOLOGIES LLC

$372,881

7.17%

380,491

GEODE CAPITAL MANAGEMENT, LLC

$318,445

6.12%

324,945

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	67,794	$66,438	20.9%	Defined
Held directly	257,151	$252,007	79.1%	Defined

TWO SIGMA INVESTMENTS, LP

$253,995

4.88%

259,179

GAGNON SECURITIES LLC

$178,499

3.43%

182,142

VANGUARD FIDUCIARY TRUST CO

$158,295

3.04%

161,526

STATE STREET CORP

$119,770

2.30%

122,215

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	122,215	$119,770	100.0%	Defined

Gen-Wealth Partners Inc

$103,008

1.98%

105,111

NORTHERN TRUST CORP

$68,348

1.31%

69,743

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	69,743	$68,348	100.0%	Defined

Qube Research & Technologies Ltd

$56,655

1.09%

57,812

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$55,685

1.07%

56,822

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	35,077	$34,375	61.7%	Other
G1 EXECUTION SERVICES, LLC	21,745	$21,310	38.3%	Other

Vontobel Holding Ltd.

$49,000

0.94%

50,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK VONTOBEL AG	50,000	$49,000	100.0%	Defined

SNS Financial Group, LLC

$42,140

0.81%

43,000

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$39,200

0.75%

40,000

AM INVESTMENT STRATEGIES LLC

$28,768

0.55%

29,356

Gerald Baker Financial Group LLC

$22,237

0.43%

22,691

MAYPORT, LLC

$21,560

0.41%

22,000

NORTH STAR ASSET MANAGEMENT INC

$19,600

0.38%

20,000

WELLS FARGO & COMPANY/MN

$19,404

0.37%

19,800

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	700	$686	3.5%	Defined
WELLS FARGO CLEARING SERVICES, LLC	19,100	$18,718	96.5%	Defined

JANE STREET GROUP, LLC

$19,110

0.37%

19,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	19,500	$19,110	100.0%	Defined

OSAIC HOLDINGS, INC.

$18,487

0.36%

18,865

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	16,240	$15,915	86.1%	Defined
Osaic Advisory Services, LLC	2,625	$2,572	13.9%	Defined

XTX Topco Ltd

$13,456

0.26%

13,731

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	13,731	$13,456	100.0%	Defined

Savvy Advisors, Inc.

$9,800

0.19%

10,000

Vanguard Global Advisers, LLC

$8,715

0.17%

8,893

UBS Group AG

$6,621

0.13%

6,758

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	5,702	$5,587	84.4%	Defined
UBS Securities LLC	1,056	$1,034	15.6%	Defined

MORGAN STANLEY

$6,214

0.12%

6,341

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY SMITH BARNEY LLC	6,341	$6,214	100.0%	Defined

Rockefeller Capital Management L.P.

$3,920

0.08%

4,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
ROCKEFELLER FINANCIAL LLC	4,000	$3,920	100.0%	Defined

Steward Partners Investment Advisory, LLC

$1,960

0.04%

2,000

NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO

$1,623

0.03%

1,657

JPMORGAN CHASE & CO

$1,464

0.03%

1,494

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities plc	1,494	$1,464	100.0%	Defined

JONES FINANCIAL COMPANIES LLLP

$1,323

0.03%

1,351

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	1,351	$1,323	100.0%	Sole

NATIONAL BANK OF CANADA /FI/

$902

0.02%

921

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
National Bank Financial Inc.	921	$902	100.0%	Defined

SBI Securities Co., Ltd.

$482

0.01%

492

PITTENGER & ANDERSON INC

$334

0.01%

341

HARBOUR INVESTMENTS, INC.

$327

0.01%

334

NISA INVESTMENT ADVISORS, LLC

$323

0.01%

330

Investors Research Corp

$294

0.01%

300

Allied Private Wealth LLC

$235

0.00%

240

BARCLAYS PLC

$198

0.00%

203

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	203	$198	100.0%	Defined

BNP PARIBAS ARBITRAGE, SA

$196

0.00%

201

FEDERATED HERMES, INC.

$134

0.00%

137

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FEDERATED MDTA LLC	137	$134	100.0%	Defined

ROYAL BANK OF CANADA

$44

0.00%

Axiom Investment Management LLC

0.00%

Caitong International Asset Management Co., Ltd

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	101,100	$100,594	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	70,241	$69,889	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Ireland Ltd	8,942	$8,897	25.6%	Defined
Held directly	25,981	$25,851	74.4%	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	12,324	$12,262	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	678	$674	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	79	$78	100.0%	Defined

Key facts CIK 1388320 CUSIP 00507W206 13F (30d) 30 filings 30 filers Visit website Investor relations