Data spanning the past 90 days through January 10, 2026 reveals that ALT5 Sigma's three principal insider shareholders consist of Chief Executive Officer Peter Tassiopoulos (420.00K shares), Chief Executive Officer Antonios Isaac (217.79K shares), Cfo Virland A Johnson (38.00K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Peter Tassiopoulos | Chief Executive Officer | 420,000 | 11 Sep, 2024 |
| Antonios Isaac | Chief Executive Officer | 217,787 | 09 Jan, 2023 |
| Virland A Johnson | Cfo | 38,000 | 12 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 |
|---|---|---|---|---|---|---|---|---|
| 30 May, 2025 | Virland A Johnson | - | - | 38,000 | D | |||
| 30 May, 2025 | Virland A Johnson | Common Stock | A | 25,000 | $0.01 | 38,000 | D | A |
| 06 Dec, 2024 | Virland A Johnson | Common Stock | A | 3,000 | $3.00 | 3,000 | D | P |
| 09 Sep, 2024 | Peter Tassiopoulos | - | - | 420,000 | I | |||
| 09 Sep, 2024 | Peter Tassiopoulos | Common Stock | A | 5,000 | $2.06 | 420,000 | I | P |
| 05 Jan, 2023 | Antonios Isaac | Common Stock | A | 125,787 | $0.00 | 217,787 | D | A |
| 05 Jan, 2023 | Virland A Johnson | - | - | 78,617 | D | |||
| 05 Jan, 2023 | Virland A Johnson | Common Stock | A | 78,617 | $0.00 | 78,617 | D | A |
| 24 May, 2021 | Virland A Johnson | Common Shares | D | 32,933 | $6.70 | 0 | D | S |
| 29 Aug, 2018 | Virland A Johnson | Common Stock | A | 30,000 | $1.00 | 52,000 | D | P |
| 27 Aug, 2018 | Virland A Johnson | Common Stock | A | 15,000 | $0.78 | 46,000 | D | P |
| 24 Aug, 2018 | Virland A Johnson | Common Stock | A | 15,000 | $0.71 | 43,000 | D | P |
| 10 Aug, 2018 | Timothy Matula | Common Stock | A | 560,000 | $0.00 | 114,000 | D | A |
| 10 Aug, 2018 | Richard Butler | Common Stock | A | 50,000 | $0.00 | 18,000 | D | A |
| 10 Aug, 2018 | Antonios Isaac | - | - | 94,000 | D | |||
| 10 Aug, 2018 | Antonios Isaac | Common Stock | A | 410,000 | $0.00 | 94,000 | D | A |
| 10 Aug, 2018 | Virland A Johnson | Common Stock | A | 200,000 | $0.00 | 40,000 | D | A |
| 03 Oct, 2017 | Richard Butler | Common Stock | A | 20,000 | $0.00 | 6,000 | D | A |
| 23 Aug, 2017 | Bradley Bremer | - | - | 1,120 | D | |||
| 23 Aug, 2017 | Bradley Bremer | - | - | 1,025 | D |