Cyclerion Therapeutics's three largest insider shareholders as of June 06, 2026 are Peter M Hecht (Chief Executive Officer, 559.20K shares), Regina Margaret Graul (President, 100.30K shares), Michael J Higgins (Director, 30.74K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Terrance Mcguire | - | 5,552 | 0 | 04 Dec, 2023 |
| Errol B Desouza | - | 30,000 | 0 | 04 Dec, 2023 |
| Peter M Hecht | Chief Executive Officer | 559,203 | 0 | 27 Mar, 2025 |
| Michael J Higgins | - | 30,740 | 0 | 27 Mar, 2025 |
| Steven Hyman | - | 20,000 | 0 | 04 Dec, 2023 |
| Regina Margaret Graul | President | 100,303 | 0 | 26 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 |
|---|---|---|---|---|---|---|---|---|
| 07 Aug, 2025 | Rhonda M. Chicko | Stock Option (Right to Buy) | A | 25,000 | $0.00 | 25,000 | D | A |
| 25 Mar, 2025 | Peter M Hecht | Common Stock | A | 181,818 | $2.75 | 559,203 | D | A |
| 25 Mar, 2025 | Michael J Higgins | Common Stock | A | 9,090 | $2.75 | 30,740 | D | A |
| 21 Nov, 2024 | Path Capital Lp Slate | Common Stock, no par value | D | 357,880 | $1.55 | 0 | I | S |
| 21 Nov, 2024 | Path Capital Lp Slate | Common Stock, no par value | D | 357,880 | $1.55 | 0 | I | S |
| 05 Aug, 2024 | Regina Margaret Graul | Stock Option (Right to Buy) | A | 55,849 | $0.00 | 55,849 | D | A |
| 05 Aug, 2024 | Regina Margaret Graul | Stock Option (Right to Buy) | A | 55,849 | $0.00 | 55,849 | D | A |
| 01 Jan, 2024 | Regina Margaret Graul | Common Stock | A | 50,000 | $0.00 | 100,303 | D | A |
| 01 Jan, 2024 | Regina Margaret Graul | Common Stock | A | 50,000 | $0.00 | 100,303 | D | A |
| 01 Jan, 2024 | Peter M Hecht | Common Stock | A | 15,000 | $0.00 | 377,385 | D | A |
| 30 Nov, 2023 | Errol B Desouza | Common Stock | A | 20,000 | $0.00 | 50,000 | D | A |
| 30 Nov, 2023 | Terrance Mcguire | Common Stock | A | 5,000 | $0.00 | 5,552 | D | A |
| 30 Nov, 2023 | Peter M Hecht | Common Stock | A | 20,000 | $0.00 | 347,385 | D | A |
| 30 Nov, 2023 | Steven Hyman | Common Stock | A | 20,000 | $0.00 | 20,000 | D | A |
| 01 Dec, 2023 | Peter M Hecht | Common Stock | A | 15,000 | $0.00 | 362,385 | D | A |
| 30 Nov, 2023 | Errol B Desouza | Common Stock | A | 30,000 | $0.00 | 30,000 | D | A |
| 09 Aug, 2023 | Terrance Mcguire | Common Stock | D | 8 | $3.40 | 0 | I | S |
| 19 May, 2023 | Peter M Hecht | Common Stock | A | 225,000 | $8.68 | 327,385 | D | A |
| 19 May, 2023 | Peter M Hecht | Series A Convertible Preferred Stock | A | 351,037 | $8.68 | 351,037 | D | A |
| 25 Jul, 2022 | Steven Hyman | Stock Option (Right to Buy) | A | 57,753 | $0.00 | 57,753 | D | A |