Brian S. Posner's most recent trade in Dyne Therapeutics Inc was a trade of 35,152 Stock option (right to buy) done . Disclosure was reported to the exchange on June 5, 2026.
| Stock | Client Name | Client Category | Action | Reported to Exchange | Quantity | Post Transaction Holding | Traded % | Avg. Price | Value | Security Type |
|---|---|---|---|---|---|---|---|---|---|---|
| Dyne Therapeutics Inc | Brian S. Posner | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 05 Jun 2026 | 35,152 | 35,152 | - | - | Stock option (right to buy) | |
| Dyne Therapeutics Inc | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 16.94 per share. | 05 Jun 2026 | 2,000 | 24,500 | - | 16.9 | 33,880 | Common Stock |
| Dyne Therapeutics Inc | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 17.48 per share. | 03 Jun 2026 | 2,500 | 22,500 | - | 17.5 | 43,700 | Common Stock |
| Dyne Therapeutics Inc | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 18.21 per share. | 26 May 2026 | 2,000 | 20,000 | - | 18.2 | 36,420 | Common Stock |
| Dyne Therapeutics Inc | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 17.12 per share. | 20 May 2026 | 2,500 | 18,000 | - | 17.1 | 42,800 | Common Stock |
| Arch Capital | Brian S. Posner | Director | Sale of securities on an exchange or to another person at price $ 17.14 per share. | 11 May 2026 | 2,000 | 0 | - | 17.1 | 34,283 | Depositary Shares, Series G |
| Arch Capital | Brian S. Posner | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 05 May 2026 | 2,071 | 122,175 (0%) | 0% | - | Common Shares, $.0011 par value per share | |
| Dyne Therapeutics Inc | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 17.08 per share. | 30 Mar 2026 | 2,000 | 15,500 | - | 17.1 | 34,160 | Common Stock |
| Arch Capital | Brian S. Posner | Director | Sale of securities on an exchange or to another person at price $ 17.12 per share. | 11 Mar 2026 | 3,000 | 2,000 | - | 17.1 | 51,345 | Depositary Shares, Series G |
| Dyne Therapeutics Inc | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 19.35 per share. | 11 Mar 2026 | 2,000 | 13,500 | - | 19.4 | 38,700 | Common Stock |
| Dyne Therapeutics Inc | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 15.06 per share. | 06 Mar 2026 | 3,000 | 11,500 | - | 15.1 | 45,180 | Common Stock |
| Dyne Therapeutics Inc | Brian S. Posner | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 01 Oct 2025 | 70,000 | 70,000 | - | - | Stock option (right to buy) | |
| Arch Capital | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 17.34 per share. | 01 Aug 2025 | 1,000 | 5,000 | - | 17.3 | 17,338 | Depositary Shares, Series G |
| Arch Capital | Brian S. Posner | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 07 May 2025 | 1,564 | 120,104 (0%) | 0% | - | Common Shares, $.0011 par value per share | |
| Arch Capital | Brian S. Posner | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 09 May 2024 | 1,455 | 118,540 (0%) | 0% | - | Common Shares, $.0011 par value per share | |
| Arch Capital | Brian S. Posner | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 04 May 2023 | 1,714 | 117,085 (0%) | 0% | - | Common Shares, $.0011 par value per share | |
| Biogen | Brian S. Posner | Director | Gift of securities by or to the insider at price $ 0.00 per share. | 31 Dec 2022 | 150 | 8,025 (0%) | 0% | 0 | Common Stock | |
| Arch Capital | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 17.60 per share. | 28 Oct 2022 | 2,000 | 4,000 | - | 17.6 | 35,200 | Depositary Shares, Series G |
| Arch Capital | Brian S. Posner | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 04 May 2022 | 2,642 | 112,729 (0%) | 0% | - | Common Shares, $.0011 par value per share | |
| Arch Capital | Brian S. Posner | Director | Grant, award, or other acquisition of securities at price $ 0.00 per share. | 04 May 2022 | 2,642 | 115,371 (0%) | 0% | - | Common Shares, $.0011 par value per share | |
| Arch Capital | Brian S. Posner | Director | Purchase of securities on an exchange or from another person at price $ 19.22 per share. | 29 Apr 2022 | 2,000 | 2,000 | - | 19.2 | 38,450 | Depositary Shares, Series G |
| Arch Capital | Brian S. Posner | Director | Sale or transfer of securities back to the company at price $ 25.00 per share. | 30 Sep 2021 | 2,000 | 0 | - | 25 | 50,000 | Depositary Shares, Series E |