Comparable stake leader
VANGUARD GROUP INC
SEC ownership of Actinium Pharmaceuticals, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001388320.
Disclosed value leader
Sandesh Seth
Comparable rows
47/50
Latest evidence
02 Sep 2026
- Public ticker
- ATNM on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD GROUP INC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
47 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD GROUP INC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
02 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001388320
- Issuer location
- New York, NY
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Actinium Pharmaceuticals, Inc. (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
Sandesh Seth
Comparable rows
47/50
Latest evidence
02 Sep 2026
13D/G
13F
3/4/5
Lead comparable stake: 4.4%
3 rows are not safely comparable across share classes.
13D/G row: VANGUARD GROUP INC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 4.4%.
47 of 50 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%
VANGUARD CAPITAL MANAGEMENT LLC
4%
COMPASS FINANCIAL MANAGEMENT LLC
1.9%
MILLENNIUM MANAGEMENT LLC
1.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
4.4%
|
$1,920,576
1,371,840 shares
|
$0 | 30 Jun 2025 |
| BlackRock, Inc. |
13D/G
13F
Company
|
1.5%
|
$646,490
462,969 shares
|
$0 | 30 Jun 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
4%
|
$1,213,536
1,238,302 shares
|
— | 30 Jun 2026 |
| COMPASS FINANCIAL MANAGEMENT LLC |
13F
Company
|
1.9%
|
$588,225
600,230 shares
|
— | 30 Jun 2026 |
| MILLENNIUM MANAGEMENT LLC |
13F
Company
|
1.6%
|
$504,288
514,580 shares
|
— | 30 Jun 2026 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
1.6%
|
$485,000
496,288 shares
|
— | 30 Jun 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
1.2%
|
$372,881
380,491 shares
|
— | 30 Jun 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
1%
|
$318,553
324,945 shares
|
— | 30 Jun 2026 |
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.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 05 Sep 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-8 of 8 reporting-owner rows connected to Actinium Pharmaceuticals, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
8
Largest Forms 3/4/5 holder
Sandesh Seth
Net 12M change
$0
Latest report
02 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Sandesh Seth | Chief Executive Officer, Director | $1,926,047 | Median | 02 Sep 2026 | ||
| C. David Nicholson | Director | $62,034 | Median | 02 Sep 2026 | ||
| Richard I. Steinhart | Director | $61,853 | Median | 02 Sep 2026 | ||
| Ajit Shetty | Director | $61,109 | Median | 02 Sep 2026 | ||
| Jeffrey W. Chell | Director | $60,368 | Median | 02 Sep 2026 | ||
| June Sherie Almenoff | Director | $17,640 | Median | 02 Sep 2026 | ||
| Steve O'Loughlin | Chief Financial Officer | Mixed | 31 Mar 2025 | |||
| Mark Stanley Berger | Chief Medical Officer | Mixed | 01 Sep 2021 |
Recent insider transactions for Actinium Pharmaceuticals, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Ajit Shetty | ATNM | Common Stock | Award | 8137.4% | 61,600 | 62,357 | 02 Sep 2026 | Direct | ||
| Ajit Shetty | ATNM | Stock Option (Right to Buy) | Award | 92,400 | 92,400 | 02 Sep 2026 | Direct | |||
| C. David Nicholson | ATNM | Common Stock | Award | 12560% | 62,800 | 63,300 | 02 Sep 2026 | Direct | ||
| C. David Nicholson | ATNM | Stock Option (Right to Buy) | Award | 94,200 | 94,200 | 02 Sep 2026 | Direct | |||
| June Sherie Almenoff | ATNM | Common Stock | Award | 18,000 | 18,000 | 02 Sep 2026 | Direct | |||
| June Sherie Almenoff | ATNM | Stock Option (Right to Buy) | Award | 27,000 | 27,000 | 02 Sep 2026 | Direct | |||
| Sandesh Seth | ATNM | Common Stock | Award | 965.3% | 1,780,874 | 1,965,355 | 02 Sep 2026 | Direct | ||
| Sandesh Seth | ATNM | Stock Option (Right to Buy) | Award | 1,130,400 | 1,130,400 | 02 Sep 2026 | Direct | |||
| Richard I. Steinhart | ATNM | Common Stock | Award | 19873.4% | 62,800 | 63,116 | 02 Sep 2026 | Direct | ||
| Richard I. Steinhart | ATNM | Stock Option (Right to Buy) | Award | 94,200 | 94,200 | 02 Sep 2026 | Direct | |||
| Jeffrey W. Chell | ATNM | Common Stock | Award | 61,600 | 61,600 | 02 Sep 2026 | Direct | |||
| Jeffrey W. Chell | ATNM | Stock Option (Right to Buy) | Award | 92,400 | 92,400 | 02 Sep 2026 | Direct |
* marks a reported price that did not pass the local price check.