What does CUSIP 00507W206 represent in this 13F holders report?

CUSIP 00507W206 is the security identifier for ATNM - Actinium Pharmaceuticals, Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held ATNM - Actinium Pharmaceuticals, Inc. - Common Stock in Q1 2026?

53 institutional investors reported ATNM - Actinium Pharmaceuticals, Inc. - Common Stock for Q1 2026. Use the holders table for investor-level position and value details.

Actinium Pharmaceuticals, Inc. - Common Stock (ATNM)

CUSIP: 00507W206

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Stock
Total 13F shares: 5,301,014
Total 13F value: $5,273,358
Share change: -135,916
SEC-reported price per share: $1.00
Number of holders: 53
Value change: -$270,917
Number of buys: 15
Number of sells: 25
Shares outstanding: 31,249,203

Security key

00507W206

Report period

Q1 2026

Institutions

Top holders

ATNM full security history Ownership snapshot Full 13F holder table Actinium Pharmaceuticals, Inc. SEC filings Actinium Pharmaceuticals, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of ATNM - Actinium Pharmaceuticals, Inc. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

VANGUARD GROUP INC

Disclosed value leader

VANGUARD GROUP INC

Comparable rows

15/15

Latest evidence

31 Dec 2025

13F 13D/G Lead comparable stake: 4.4% 13D/G row: VANGUARD GROUP INC Showing 1-6 of 15 holder rows.

Quick read

VANGUARD GROUP INC leads the comparable SEC ownership view at 4.4%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens VANGUARD GROUP INC's linked filing trail.

Comparable ownership Top 5

VANGUARD GROUP INC 4.4%

BlackRock, Inc. 1.5%

ACADIAN ASSET MANAGEMENT LLC 1.9%

MILLENNIUM MANAGEMENT LLC 1.9%

RENAISSANCE TECHNOLOGIES LLC 1.3%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
VANGUARD GROUP INC	13F 13D/G Company · The Vanguard Group 13F 13D/G	4.4% from 13D/G	$1,932,611 1,421,038 shares	—	31 Dec 2025
BlackRock, Inc.	13D/G 13F Company 13D/G 13F	1.5%	$646,490 462,969 shares	$0	30 Jun 2025
ACADIAN ASSET MANAGEMENT LLC	13F Company 13F	1.9%	$823,000 606,339 shares	—	31 Dec 2025
MILLENNIUM MANAGEMENT LLC	13F Company 13F	1.9%	$818,176 601,600 shares	—	31 Dec 2025
RENAISSANCE TECHNOLOGIES LLC	13F Company 13F	1.3%	$531,466 390,784 shares	—	31 Dec 2025
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	1.1%	$447,564 328,994 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

5,301,014

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %