ATNM · Actinium Pharmaceuticals, Inc. · Holdings

$1.59 +0.00 (+0.00%) At close · Nov 12

Market Cap

$49.99M

31.44M

Volume · Nov 12 348.12K Avg daily vol (3M) 190.03K

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 → See every holder of ATNM: 13F, 13D and 13G, insiders and funds →

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 47

Total Value: $5,252,591

Total Shares: 5,051,685

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 48 13F filers with any position, options included

Top Holder

23.3%

of institutional value

Top 5

61.1%

of institutional value

Top 10

85.8%

of institutional value

HHI

1,059

Broadly held

Who Holds ATNM

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 47 filers, like-for-like change -11.5%; actively managed books -18.0%; index-like books -3.7%.

Holder type	Share	Filers	Change	New	Exited
Registered adviser	71.0%	22	-7.9%	3	2
Exempt adviser	1.1%	1	+8.5%	0	1
Adviser	0.0%	1	-90.2%	0	0
Bank	4.2%	8	-7.7%	1	1
Non-US	0.0%	2	-11.0%	0	0
Holding company	8.0%	3	-11.3%	0	2
Broker-dealer	0.0%	0	—	0	0
Insurer	0.0%	0	—	0	0
Benefit plan	0.0%	0	—	0	0
Unknown	15.8%	10	-24.4%	0	6

Style	Share	Filers	Change	New	Exited
Index-like	43.8%	7	-3.7%	0	1
Systematic-like	23.2%	5	-15.9%	0	1
Concentrated	1.0%	6	-50.2%	0	3
Diversified active	32.0%	29	-17.6%	4	7
Not measured	0.0%	0	—	0	0
Unknown	0.0%	0	—	0	0

Turnover	Share	Filers	Change	New	Exited
Low turnover	20.7%	23	-8.2%	2	7
Medium turnover	16.7%	10	-11.6%	1	1
High turnover	24.2%	7	-22.9%	0	4
Unknown	38.4%	7	-1.1%	1	0
Not measured	0.0%	0	—	0	0

Holding horizon	Share	Filers	Change	New	Exited
Short horizon	38.7%	9	-5.2%	1	2
Medium horizon	9.7%	4	+2.1%	0	1
Long horizon	45.7%	32	-16.2%	3	8
Unknown	6.0%	2	-18.9%	0	1
Not measured	0.0%	0	—	0	0

13F book size	Share	Filers	Change	New	Exited
Under $1B	18.2%	10	-15.6%	1	2
$1B to $10B	2.4%	8	-25.9%	2	5
$10B to $100B	19.1%	9	-12.0%	0	0
$100B or more	60.3%	20	-10.1%	1	5
Not measured	0.0%	0	—	0	0

Client base	Share	Filers	Change	New	Exited
Individuals and high net worth	18.7%	14	+2.7%	3	1
Pooled investment vehicles	22.0%	4	-15.9%	0	0
Registered funds and BDCs	30.3%	3	-3.8%	0	1
Pension and profit sharing plans	0.0%	1	0.0%	0	0
Diversified	0.0%	0	—	0	0
Insurance companies	0.0%	0	—	0	0
Governments and sovereign funds	0.0%	0	—	0	0
Unknown	29.0%	25	-18.1%	1	10

Private funds	Share	Filers	Change	New	Exited
Hedge funds	22.9%	5	-15.0%	0	1
Other private funds	0.8%	2	-44.2%	0	1
No private funds	48.3%	16	-0.9%	3	1
Real estate funds	0.0%	0	—	0	0
Private funds, type not stated	0.0%	0	—	0	0
Mixed private funds	0.0%	0	—	0	0
Securitized asset funds	0.0%	0	—	0	0
Unknown	27.9%	24	-18.8%	1	9

Location	Share	Filers	Change	New	Exited
United States	97.5%	38	-11.8%	3	11
Outside the US	2.5%	9	+0.2%	1	1

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 2 holders with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

47 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders

0.000% of filers hold it in their top 10

Mar 31, 2026: 0

Holders above 5%

median weight 0.000%

Mar 31, 2026: 0

Crowding

4.23%

of shares outstanding, 14th percentile

Mar 31, 2026: 5.55%

Private-fund advisers

4.00%

of shares outstanding

Institutional ownership

16.9%

17.0% of the estimated free float

Top 10 holders

86.1%

of 13F shares, Herfindahl 0.107

Active holders

-18.0%

like-for-like share change of active filers

5% stakes on record

0 13D, 2 13G (1 institutional, 1 passive, 0 exempt)

How long holders have held it value-weighted 6.9 quarters

Under 1 year 40.0% 1 to 3 years 47.4% 3 years or more 12.7% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost

$2.20

estimated per share

Mar 31, 2026: $2.23

Quarter-end price

$0.98

implied by 13F values

Estimated gain or loss

-55.5%

price against the estimated cost

Estimated at a loss

100.0%

of costed 13F value

Estimated cost covers 45.0% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies ATNM's active holders also own, quarter ended Jun 30, 2026

#	Company	Shared holders	Similarity
1	BA Boeing Co	3	0.038
2	MRK Merck & Co., Inc.	4	0.034
3	PLTR Palantir Technologies Inc.	3	0.034
4	MCD Mcdonalds Corp	3	0.029
5	TSM Taiwan Semiconductor Manufacturing Co Ltd	3	0.027
6	NVDA Nvidia Corp	4	0.026
7	MSFT Microsoft Corp	4	0.026
8	GOOGL Alphabet Inc.	4	0.025
9	MU Micron Technology Inc	3	0.025
10	PG PROCTER & GAMBLE Co	3	0.025

Shareholder Targets

13F filers that own its peers but not ATNM, quarter ended Jun 30, 2026

Found through its holder-overlap peers: BA, MRK, PLTR, MCD, TSM, NVDA, MSFT, GOOGL, MU, PG, AMD, CAT, TSLA, COST, ABBV, XOM, WMT, JNJ, AVGO, BRK-B. 7,255 filers in all.

#	Filer	In peers	Of book	Largest peers
1	FMR LLC Holding company, Diversified active	$640,673,976,417 20 held	27.9%	NVDA, GOOGL, MSFT
2	VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active	$472,277,180,461 20 held	21.3%	NVDA, GOOGL, MSFT
3	Invesco Ltd. Adviser, Diversified active	$342,183,031,535 20 held	27.1%	NVDA, GOOGL, MU
4	NORGES BANK Non-US, Index-like	$294,533,551,294 18 held	29.4%	NVDA, GOOGL, MSFT
5	PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active	$291,015,339,709 20 held	29.2%	NVDA, GOOGL, MSFT
6	Capital World Investors Adviser, Diversified active	$230,290,711,619 17 held	27.3%	AVGO, GOOGL, MU
7	BANK OF AMERICA CORP /DE/ Bank, Diversified active	$220,951,493,964 20 held	14.5%	NVDA, GOOGL, MSFT
8	GOLDMAN SACHS GROUP INC Holding company, Index-like	$200,617,659,419 20 held	21.1%	NVDA, GOOGL, MSFT
9	Capital Research Global Investors Adviser, Diversified active	$195,254,718,862 20 held	27.3%	AVGO, NVDA, GOOGL
10	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser, Index-like	$167,372,124,719 20 held	30.5%	NVDA, GOOGL, MSFT

Fund Ownership of ATNM by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 5.13% of shares outstanding.

Fund type	Of shares outstanding	Change	Shares	Funds
Index funds	0.87%	-0.06 pp	272,804	5
Index ETFs	4.26%	+0.11 pp	1,340,649	3
Active ETFs	0.00%	0.00 pp	0	0
Active funds	0.16%	-0.01 pp	48,963	3
Unclassified	0.00%	0.00 pp	0	0
All registered funds	5.29%	+0.04 pp	1,662,416	11

How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 21 Exempt adviser 1 Bank 9 Non-US 2 Holding company 4 Unknown 10

Showing 47 of 47

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

VANGUARD CAPITAL MANAGEMENT LLC

$1,213,535

23.10%

1,238,302

ACADIAN ASSET MANAGEMENT LLC

$538,715

10.26%

480,996

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

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	480,996	$538,715	100.0%	Defined

MILLENNIUM MANAGEMENT LLC

$504,288

9.60%

514,580

COMPASS FINANCIAL MANAGEMENT LLC

$435,937

8.30%

389,230

BlackRock, Inc.

$387,977

7.39%

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

$383,699

7.30%

342,589

GEODE CAPITAL MANAGEMENT, LLC

$363,938

6.93%

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	69,544	$77,889	21.4%	Defined
Held directly	255,401	$286,049	78.6%	Defined

TWO SIGMA INVESTMENTS, LP

$253,995

4.84%

259,179

GAGNON SECURITIES LLC

$203,999

3.88%

182,142

VANGUARD FIDUCIARY TRUST CO

$158,295

3.01%

161,526

STATE STREET CORP

$136,880

2.61%

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	$136,880	100.0%	Defined

AM INVESTMENT STRATEGIES LLC

$103,998

1.98%

92,856

NORTHERN TRUST CORP

$68,348

1.30%

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

Gen-Wealth Partners Inc

$67,005

1.28%

59,826

Qube Research & Technologies Ltd

$56,655

1.08%

57,812

Vontobel Holding Ltd.

$56,000

1.07%

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	$56,000	100.0%	Defined

SNS Financial Group, LLC

$56,000

1.07%

50,000

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$55,685

1.06%

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

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$39,200

0.75%

40,000

Gerald Baker Financial Group LLC

$22,310

0.42%

19,920

MAYPORT, LLC

$21,560

0.41%

22,000

OSAIC HOLDINGS, INC.

$20,988

0.40%

18,740

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

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	16,115	$18,048	86.0%	Defined
Osaic Advisory Services, LLC	2,625	$2,940	14.0%	Defined

NORTH STAR ASSET MANAGEMENT INC

$19,600

0.37%

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

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.

$11,200

0.21%

10,000

CITIGROUP INC

$9,843

0.19%

8,789

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	8,789	$9,843	100.0%	Defined

Vanguard Global Advisers, LLC

$8,715

0.17%

8,893

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

0.07%

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

JPMORGAN CHASE & CO

$1,673

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	$1,673	100.0%	Defined

NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO

$1,623

0.03%

1,657

FMR LLC

$1,492

0.03%

1,333

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	1,000	$1,120	75.1%	Defined
STRATEGIC ADVISERS LLC	333	$372	24.9%	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.

$551

0.01%

492

PITTENGER & ANDERSON INC

$381

0.01%

341

HARBOUR INVESTMENTS, INC.

$374

0.01%

334

Investors Research Corp

$336

0.01%

300

Allied Private Wealth LLC

$235

0.00%

240

BNP PARIBAS ARBITRAGE, SA

$225

0.00%

201

UBS Group AG

$61

0.00%

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

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	55	$61	100.0%	Defined

ROYAL BANK OF CANADA

$44

0.00%

BARCLAYS PLC

$34

0.00%

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

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	31	$34	100.0%	Defined

Cassaday & Co Wealth Management LLC

$17

0.00%

Caitong International Asset Management Co., Ltd

0.00%

Key facts CIK 1388320 CUSIP 00507W206 13F (30d) 33 filings 23 filers Visit website Investor relations