| Insiders | Shares | % | Avg Price | Total $ | |
|---|---|---|---|---|---|
| Buys | 0 | ||||
| Sells | 2 | -214,500 | 100% | $7.42 | -$1,592,110 |
| Net | -2 | -214,500 | -100% | -$1,592,110 |
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Report Date |
|---|---|---|---|---|---|
| PERCEPTIVE ADVISORS LLC | Director, 10%+ Owner | $80,928,024 | 31 Dec 2025 | ||
| Sanofi | 10%+ Owner | $77,577,607 | 12 Aug 2024 | ||
| Johnson & Johnson Innovation - JJDC, Inc. | 10%+ Owner | $42,237,167 | 15 Sep 2023 | ||
| JOHNSON & JOHNSON | 10%+ Owner | $42,237,167 | 09 Nov 2022 | ||
| Alexandria Forbes | PRESIDENT & CEO, Director | $11,262,127 | -$1,030,750 | -8.4% | 21 Feb 2026 |
| Richard Giroux | Cfo & Coo | $8,376,314 | -$561,360 | -6.3% | 21 Feb 2026 |
| Stuart Naylor | Chief Dev. Officer | $5,186,436 | 21 Feb 2026 | ||
| Robert K. Zeldin | Chief Medical Officer | $1,288,015 | 21 Feb 2026 | ||
| Keith R. Harris | Director | $837,500 | 12 Jun 2025 | ||
| Robert J. Wollin | General Counsel And Secretary | $427,458 | 21 Feb 2026 | ||
| Martin Indyk | Director | $222,600 | 05 Jun 2024 | ||
| Debra Yu | Director | 12 Jun 2025 | |||
| Ellen Hukkelhoven | Director | 12 Jun 2025 | |||
| Neil Mendoza | Director | 12 Jun 2025 | |||
| Nicole Seligman | Director | 12 Jun 2025 | |||
| Arnold J. Levine | Director | 07 Jun 2022 | |||
| Joel S. Marcus | Director | 07 Jun 2022 | |||
| Thomas E. Shenk | Director | 12 Jun 2025 |
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Robert K. Zeldin | MGTX | Ordinary Shares | Tax liability | -1.68% | -2,952 | 172,888 | 21 Feb 2026 | Direct | ||
| Robert K. Zeldin | MGTX | Ordinary Shares | Options Exercise | 4.46% | 7,500 | 175,840 | 21 Feb 2026 | Direct | ||
| Robert K. Zeldin | MGTX | Restricted Share Units | Options Exercise | -50% | -7,500 | 7,500 | 21 Feb 2026 | Direct | ||
| Robert J. Wollin | MGTX | Ordinary Shares | Tax liability | -9.39% | -5,949 | 57,377 | 21 Feb 2026 | Direct | ||
| Robert J. Wollin | MGTX | Ordinary Shares | Options Exercise | 21.6% | 11,250 | 63,326 | 21 Feb 2026 | Direct | ||
| Robert J. Wollin | MGTX | Restricted Share Units | Options Exercise | -50% | -11,250 | 11,250 | 21 Feb 2026 | Direct | ||
| Stuart Naylor | MGTX | Ordinary Shares | Tax liability | -1.66% | -11,750 | 696,166 | 21 Feb 2026 | Direct | ||
| Stuart Naylor | MGTX | Ordinary Shares | Options Exercise | 3.66% | 25,000 | 707,916 | 21 Feb 2026 | Direct | ||
| Stuart Naylor | MGTX | Restricted Share Units | Options Exercise | -50% | -25,000 | 25,000 | 21 Feb 2026 | Direct | ||
| Richard Giroux | MGTX | Ordinary Shares | Tax liability | -3% | -31,726 | 1,027,530 | 21 Feb 2026 | Direct | ||
| Richard Giroux | MGTX | Ordinary Shares | Options Exercise | 6% | 60,000 | 1,059,256 | 21 Feb 2026 | Direct | ||
| Richard Giroux | MGTX | Restricted Share Units | Options Exercise | -50% | -60,000 | 60,000 | 21 Feb 2026 | Direct | ||
| Alexandria Forbes | MGTX | Ordinary Shares | Tax liability | -2.14% | -33,048 | 1,511,695 | 21 Feb 2026 | Direct | ||
| Alexandria Forbes | MGTX | Ordinary Shares | Options Exercise | 4.22% | 62,500 | 1,544,743 | 21 Feb 2026 | Direct | ||
| Alexandria Forbes | MGTX | Restricted Share Units | Options Exercise | -50% | -62,500 | 62,500 | 21 Feb 2026 | Direct | ||
| Robert K. Zeldin | MGTX | Ordinary Shares | Tax liability | -7.65% | -13,951 | 168,340 | 17 Jan 2026 | Direct | ||
| Robert K. Zeldin | MGTX | Ordinary Shares | Options Exercise | 23.8% | 35,000 | 182,291 | 17 Jan 2026 | Direct | ||
| Robert K. Zeldin | MGTX | Restricted Share Units | Options Exercise | -50% | -35,000 | 35,000 | 17 Jan 2026 | Direct | ||
| Robert J. Wollin | MGTX | Ordinary Shares | Tax liability | -34.3% | -27,206 | 52,076 | 17 Jan 2026 | Direct | ||
| Robert J. Wollin | MGTX | Ordinary Shares | Options Exercise | 170.8% | 50,000 | 79,282 | 17 Jan 2026 | Direct | ||
| Robert J. Wollin | MGTX | Restricted Share Units | Options Exercise | -50% | -50,000 | 50,000 | 17 Jan 2026 | Direct | ||
| Stuart Naylor | MGTX | Ordinary Shares | Tax liability | -4.91% | -35,250 | 682,916 | 17 Jan 2026 | Direct | ||
| Stuart Naylor | MGTX | Ordinary Shares | Options Exercise | 11.7% | 75,000 | 718,166 | 17 Jan 2026 | Direct | ||
| Stuart Naylor | MGTX | Restricted Share Units | Options Exercise | -50% | -75,000 | 75,000 | 17 Jan 2026 | Direct | ||
| Richard Giroux | MGTX | Ordinary Shares | Tax liability | -14.1% | -163,916 | 999,256 | 17 Jan 2026 | Direct | ||
| Richard Giroux | MGTX | Ordinary Shares | Options Exercise | 36.3% | 310,000 | 1,163,172 | 17 Jan 2026 | Direct | ||
| Richard Giroux | MGTX | Restricted Share Units | Options Exercise | -50% | -310,000 | 310,000 | 17 Jan 2026 | Direct | ||
| Alexandria Forbes | MGTX | Ordinary Shares | Tax liability | -9.96% | -163,916 | 1,482,243 | 17 Jan 2026 | Direct | ||
| Alexandria Forbes | MGTX | Ordinary Shares | Options Exercise | 23.2% | 310,000 | 1,646,159 | 17 Jan 2026 | Direct | ||
| Alexandria Forbes | MGTX | Restricted Share Units | Options Exercise | -50% | -310,000 | 310,000 | 17 Jan 2026 | Direct | ||
| Robert K. Zeldin | MGTX | Ordinary Shares | Tax liability | -4.37% | -6,729 | 147,291 | 07 Jan 2026 | Direct | ||
| Robert K. Zeldin | MGTX | Ordinary Shares | Options Exercise | 12.8% | 17,500 | 154,020 | 07 Jan 2026 | Direct | ||
| Robert K. Zeldin | MGTX | Restricted Share Units | Options Exercise | -100% | -17,500 | 0 | 07 Jan 2026 | Direct | ||
| Robert J. Wollin | MGTX | Ordinary Shares | Tax liability | -13% | -4,364 | 29,282 | 07 Jan 2026 | Direct | ||
| Robert J. Wollin | MGTX | Ordinary Shares | Options Exercise | 28.7% | 7,500 | 33,646 | 07 Jan 2026 | Direct | ||
| Robert J. Wollin | MGTX | Restricted Share Units | Options Exercise | -100% | -7,500 | 0 | 07 Jan 2026 | Direct | ||
| Stuart Naylor | MGTX | Ordinary Shares | Tax liability | -2.67% | -17,625 | 643,166 | 07 Jan 2026 | Direct | ||
| Stuart Naylor | MGTX | Ordinary Shares | Options Exercise | 6.02% | 37,500 | 660,791 | 07 Jan 2026 | Direct | ||
| Stuart Naylor | MGTX | Restricted Share Units | Options Exercise | -100% | -37,500 | 0 | 07 Jan 2026 | Direct | ||
| Richard Giroux | MGTX | Ordinary Shares | Tax liability | -3.27% | -28,822 | 853,172 | 07 Jan 2026 | Direct | ||
| Richard Giroux | MGTX | Ordinary Shares | Options Exercise | 6.33% | 52,500 | 881,994 | 07 Jan 2026 | Direct | ||
| Richard Giroux | MGTX | Restricted Share Units | Options Exercise | -100% | -52,500 | 0 | 07 Jan 2026 | Direct | ||
| Alexandria Forbes | MGTX | Ordinary Shares | Tax liability | -2.49% | -34,074 | 1,336,159 | 07 Jan 2026 | Direct | ||
| Alexandria Forbes | MGTX | Ordinary Shares | Options Exercise | 4.78% | 62,500 | 1,370,233 | 07 Jan 2026 | Direct | ||
| Alexandria Forbes | MGTX | Restricted Share Units | Options Exercise | -100% | -62,500 | 0 | 07 Jan 2026 | Direct | ||
| Perceptive Advisors Llc | MGTX | Ordinary Shares | Disposed to Issuer | -18.4% | -2,300,000 | 10,231,103 | 31 Dec 2025 | See Footnote | ||
| Alexandria Forbes | MGTX | Ordinary Shares | Gift | -0.48% | -6,250 | 1,307,733 | 23 Dec 2025 | Direct | ||
| Robert J. Wollin | MGTX | Ordinary Shares | Gift | -16% | -5,000 | 26,146 | 20 Nov 2025 | Direct | ||
| Richard Giroux | MGTX | Ordinary Shares | Sale | -2.81% | $212,880 | $8.87 | -24,000 | 829,494 | 21 Oct 2025 | Direct |
| Alexandria Forbes | MGTX | Ordinary Shares | Sale | -3.49% | $398,525 | $8.39 | -47,500 | 1,313,983 | 07 Oct 2025 | Direct |