As of September 09, 2026, Cyclerion Therapeutics's top three insider holders are Peter M Hecht (Chief Executive Officer, 910.24K shares), Regina Margaret Graul (Director, 107.52K shares), Regina Margaret Graul (President, 100.30K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Peter M Hecht | Chief Executive Officer | 910,240 | 0 | 910,240 | 76.2% | 20 Jul, 2026 |
| 2 | Regina Margaret Graul | Director, Officer | 207,826 | 0 | 207,826 | 17.4% | 18 Aug, 2026 |
| 3 | Michael J Higgins | Director | 30,740 | 0 | 30,740 | 2.6% | 27 Mar, 2025 |
| 4 | Rhonda M. Chicko | Chief Financial Officer | 25,018 | 0 | 25,018 | 2.1% | 18 Aug, 2026 |
| 5 | Steven Hyman | Director | 20,000 | 0 | 20,000 | 1.7% | 04 Dec, 2023 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 14 Aug, 2026 | Rhonda M. Chicko | Chief Financial Officer | Acquired M | 25,000 | $2.36 | $58.88K | 25,018 | Direct |
| 14 Aug, 2026 | Regina Margaret Graul | Director, Officer | Acquired M | 55,849 | $3.30 | $184.30K | 156,152 | Direct |
| 14 Aug, 2026 | Regina Margaret Graul | Director, Officer | Disposed F | 48,629 | $3.79 | $184.30K | 107,523 | Direct |
| 14 Aug, 2026 | Rhonda M. Chicko | Chief Financial Officer | Disposed M | 25,000 | $0.00 | $0 | 0 | Direct |
| 14 Aug, 2026 | Regina Margaret Graul | Director, Officer | Disposed M | 55,849 | $0.00 | $0 | 0 | Direct |
| 16 Jul, 2026 | Peter M Hecht | Director, TenPercentOwner | Acquired C | 351,037 | — | — | 910,240 | Direct |
| 16 Jul, 2026 | Peter M Hecht | Director, TenPercentOwner | Disposed C | 351,037 | — | — | 0 | Direct |
| 07 Aug, 2025 | Rhonda M. Chicko | Chief Financial Officer | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 25 Mar, 2025 | Michael J Higgins | Director | Acquired A | 9,090 | $2.75 | $25.00K | 30,740 | Direct |
| 25 Mar, 2025 | Peter M Hecht | Director, TenPercentOwner | Acquired A | 181,818 | $2.75 | $500.00K | 559,203 | Direct |
| 21 Nov, 2024 | Path Capital Lp Slate | TenPercentOwner | Disposed S | 357,880 | $1.55 | $555.11K | 0 | Indirect |
| 21 Nov, 2024 | Path Capital Lp Slate | TenPercentOwner | Disposed S | 357,880 | $1.55 | $555.11K | 0 | Indirect |
| 21 Nov, 2024 | Path Capital Lp Slate | TenPercentOwner | Disposed S | 357,880 | $1.55 | $555.11K | 0 | Indirect |
| 21 Nov, 2024 | Path Capital Lp Slate | TenPercentOwner | Disposed S | 357,880 | $1.55 | $555.11K | 0 | Indirect |
| 05 Aug, 2024 | Regina Margaret Graul | Director, Officer | Acquired A | 55,849 | $0.00 | $0 | 55,849 | Direct |
| 05 Aug, 2024 | Regina Margaret Graul | Director, Officer | Acquired A | 55,849 | $0.00 | $0 | 55,849 | Direct |
| 05 Aug, 2024 | Regina Margaret Graul | Director, Officer | Acquired A | 55,849 | $0.00 | $0 | 55,849 | Direct |
| 05 Aug, 2024 | Regina Margaret Graul | Director, Officer | Acquired A | 55,849 | $0.00 | $0 | 55,849 | Direct |
| 01 Jan, 2024 | Regina Margaret Graul | President | Acquired A | 50,000 | $0.00 | $0 | 100,303 | Direct |
| 01 Jan, 2024 | Regina Margaret Graul | President | Acquired A | 50,000 | $0.00 | $0 | 100,303 | Direct |