AMST's three largest insider shareholders as of July 26, 2026 are Ann Marie Sastry (Chief Executive Officer, 875.43K shares), George Parmer (Director, 323.06K shares), Gilbert S Omenn (Director, 143.70K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Gilbert S Omenn | - | 0 | 143,699 | 10 Mar, 2026 |
| J Michael Losh | - | 0 | 138,200 | 10 Mar, 2026 |
| Richard Ogawa | - | 90,666 | 0 | 03 Dec, 2021 |
| George Parmer | - | 323,060 | 0 | 10 Mar, 2026 |
| Ann Marie Sastry | Chief Executive Officer | 0 | 875,431 | 08 Jan, 2025 |
| Anthony M. Barkett | - | 62,000 | 0 | 08 Dec, 2021 |
| Barbie Brewer | - | 135,977 | 0 | 10 Mar, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 31 Mar, 2026 | George Parmer | Restricted Stock Units | A | 6,522 | $0.00 | 67,887 | D | A |
| 31 Mar, 2026 | Barbie Brewer | Restricted Stock Units | A | 7,541 | $0.00 | 30,322 | D | A |
| 31 Mar, 2026 | J Michael Losh | Restricted Stock Units | A | 7,880 | $0.00 | 90,363 | I | A |
| 31 Mar, 2026 | Barbie Brewer | Restricted Stock Units | A | 7,541 | $0.00 | 30,322 | D | A |
| 31 Mar, 2026 | Gilbert S Omenn | Restricted Stock Units | A | 6,522 | $0.00 | 74,783 | I | A |
| 31 Mar, 2026 | Barbie Brewer | Restricted Stock Units | A | 7,541 | $0.00 | 30,322 | D | A |
| 07 Mar, 2026 | J Michael Losh | Common Stock | A | 41,322 | - | 138,200 | I | M |
| 07 Mar, 2026 | Barbie Brewer | Common Stock | A | 41,322 | - | 135,977 | D | M |
| 07 Mar, 2026 | George Parmer | Common Stock | A | 41,322 | - | 323,060 | D | M |
| 07 Mar, 2026 | Gilbert S Omenn | Common Stock | A | 41,322 | - | 143,699 | I | M |
| 07 Mar, 2026 | Barbie Brewer | Common Stock | A | 41,322 | - | 135,977 | D | M |
| 07 Mar, 2026 | Barbie Brewer | Common Stock | A | 41,322 | - | 135,977 | D | M |
| 07 Mar, 2026 | George Parmer | Restricted Stock Units | D | 41,322 | $0.00 | 0 | D | M |
| 07 Mar, 2026 | Barbie Brewer | Restricted Stock Units | D | 41,322 | $0.00 | 0 | D | M |
| 07 Mar, 2026 | Barbie Brewer | Restricted Stock Units | D | 41,322 | $0.00 | 0 | D | M |
| 07 Mar, 2026 | Barbie Brewer | Restricted Stock Units | D | 41,322 | $0.00 | 0 | D | M |
| 07 Mar, 2026 | J Michael Losh | Restricted Stock Units | D | 41,322 | $0.00 | 0 | I | M |
| 07 Mar, 2026 | Gilbert S Omenn | Restricted Stock Units | D | 41,322 | $0.00 | 0 | I | M |
| 06 Feb, 2026 | Barbie Brewer | Restricted Stock Units | A | 49,751 | $0.00 | 49,751 | D | A |
| 06 Feb, 2026 | Barbie Brewer | Restricted Stock Units | A | 49,751 | $0.00 | 49,751 | D | A |