ATNM's three largest insider shareholders as of March 23, 2026 are Sandesh Seth (Chief Executive Officer, 184.48K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Sandesh Seth | Chief Executive Officer | 184,481 | 0 | 20 Aug, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 18 Aug, 2025 | Sandesh Seth | Common Stock | D | 120,900 | $1.71 | 184,481 | D | F |
| 31 Mar, 2025 | Steve O'Loughlin | Stock Option (Right to Buy) | D | 3,333 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Ajit Shetty | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Sandesh Seth | Stock Option (Right to Buy) | D | 16,666 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Richard I Steinhart | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Jeffrey W. Chell | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | C. David Nicholson, | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Richard I Steinhart | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Jeffrey W. Chell | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Ajit Shetty | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Steve O'Loughlin | Stock Option (Right to Buy) | D | 1,666 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | C. David Nicholson, | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Sandesh Seth | Stock Option (Right to Buy) | D | 25,000 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | C. David Nicholson, | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Richard I Steinhart | Stock Option (Right to Buy) | D | 2,500 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Steve O'Loughlin | Stock Option (Right to Buy) | D | 3,333 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Jeffrey W. Chell | Stock Option (Right to Buy) | D | 8,333 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Ajit Shetty | tock Option (Right to Buy) | D | 8,333 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Sandesh Seth | Stock Option (Right to Buy) | D | 33,333 | $0.00 | 0 | D | D |
| 31 Mar, 2025 | Steve O'Loughlin | Stock Option (Right to Buy) | D | 8,833 | $0.00 | 0 | D | D |