// company-profile
Actinium Pharmaceuticals, Inc.
ATNMExchangeNYSESectorPharmaceutical PreparationsInc.DEFilings15Insiders7
// api This Actinium Pharmaceuticals, Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
No insider activity recorded for ATNM in the last 90 days.
Institutional Ownership
Top 13F-HR holders of Actinium Pharmaceuticals, Inc. as of 2026-03-31
Total reported AUM
$4.6M
QoQ change
-25.8%
Reporting period
2026-03-31
#1
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$1.2M
1.3M shares
#2
MILLENNIUM MANAGEMENT LLC
CIK 1273087
$561,946
565K shares
#3
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
$469,383
472K shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 18, 2025 | SETH SANDESH | ATNM | Tax Withholding | 120,900 | $1.71 | $207K |
| Mar 31, 2025 | Steinhart Richard I | ATNM | Disposition | 70,311 | $0.00 | $0K |
| Mar 31, 2025 | Steinhart Richard I | ATNM | Disposition | 2,500 | $0.00 | $0K |
| Mar 31, 2025 | Steinhart Richard I | ATNM | Disposition | 2,500 | $0.00 | $0K |
| Mar 31, 2025 | Steinhart Richard I | ATNM | Disposition | 2,500 | $0.00 | $0K |
45 more transactions hidden
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