As of March 23, 2026, the three largest insider holders of GERN are Robert J. Spiegel (Director, 194.46K shares), Susan Molineaux (Director, 130.53K shares), Karin Eastham (Director, 109.05K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Robert J. Spiegel | 194,464 | 0 | 05 Jan, 2026 | |
| Susan Molineaux | 0 | 130,527 | 03 Jan, 2024 | |
| Karin Eastham | 109,047 | 0 | 17 Jan, 2023 | |
| James Ziegler | Evp, Chief Commercial Officer | 100,000 | 0 | 03 Mar, 2025 |
| Olivia Kyusuk Bloom | Evp, Chief Financial Officer | 74,588 | 0 | 10 Feb, 2023 |
| Elizabeth G. O'Farrell | 7,407 | 26,220 | 24 Aug, 2023 | |
| Scott Alan Samuels | Evp, Chief Legal Officer | 26,682 | 0 | 03 Mar, 2025 |
| Michelle Robertson | Evp, Chief Financial Officer | 17,645 | 0 | 19 Feb, 2026 |
| V Bryan Lawlis | 13,300 | 0 | 13 May, 2025 | |
| John A Scarlett | Chairman, President And Ceo | 12,500 | 0 | 03 Mar, 2025 |
| Gaurav Aggarwal | 1,970 | 0 | 03 Jan, 2024 |
* 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 Feb, 2026 | Michelle Robertson | Common Stock | A | 27,500 | $0.00 | 27,500 | D | M |
| 17 Feb, 2026 | Joseph Eid | Stock Option (Right to Buy) | A | 2,220,000 | $0.00 | 2,220,000 | D | A |
| 18 Feb, 2026 | Michelle Robertson | Common Stock | D | 9,855 | $1.94 | 17,645 | D | S |
| 17 Feb, 2026 | Michelle Robertson | Stock Option (Right to Buy) | A | 1,660,000 | $0.00 | 1,660,000 | D | A |
| 18 Feb, 2026 | Michelle Robertson | Restricted Stock Units | D | 27,500 | $0.00 | 82,500 | D | M |
| 31 Dec, 2025 | Robert J. Spiegel | Common Stock | A | 5,918 | $1.32 | 194,464 | D | A |
| 20 Oct, 2025 | Ahmed Elnawawi | Stock Option (right to buy) | A | 3,000,000 | $0.00 | 3,000,000 | D | A |
| 30 Sep, 2025 | Robert J. Spiegel | Common Stock | A | 5,702 | $1.37 | 188,546 | D | A |
| 07 Aug, 2025 | Harout Semerjian | Stock Option (right to buy) | A | 7,000,000 | $0.00 | 7,000,000 | D | A |
| 07 Aug, 2025 | Harout Semerjian | Stock Option (right to buy) | A | 4,000,000 | $0.00 | 4,000,000 | D | A |
| 30 Jun, 2025 | Robert J. Spiegel | Common Stock | A | 5,540 | $1.41 | 182,844 | D | A |
| 21 May, 2025 | Robert J. Spiegel | Stock Option (right to buy) | A | 180,000 | $0.00 | 180,000 | D | A |
| 21 May, 2025 | Elizabeth G. O'Farrell | Stock Option (right to buy) | A | 180,000 | $0.00 | 180,000 | D | A |
| 21 May, 2025 | Susan Molineaux | Stock Option (right to buy) | A | 180,000 | $0.00 | 180,000 | D | A |
| 21 May, 2025 | V Bryan Lawlis | Stock Option (right to buy) | A | 180,000 | $0.00 | 180,000 | D | A |
| 21 May, 2025 | Gaurav Aggarwal | Stock Option (right to buy) | A | 180,000 | $0.00 | 180,000 | D | A |
| 21 May, 2025 | John F Mcdonald | Stock Option (right to buy) | A | 180,000 | $0.00 | 180,000 | D | A |
| 21 May, 2025 | Dawn Carter Bir | Stock Option (right to buy) | A | 180,000 | $0.00 | 180,000 | D | A |
| 09 May, 2025 | V Bryan Lawlis | Common Stock | A | 13,300 | $1.18 | 13,300 | D | P |
| 31 Mar, 2025 | Robert J. Spiegel | Common Stock | A | 4,913 | $1.59 | 177,304 | D | A |