The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 18, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell(S) | 62K | $13.86 | $859K |
| Jul 21, 2026 | Giroux Richard | CFO & COO | Sell(S) | 56K | $12.51 | $701K |
| Jul 7, 2026 | Naylor Stuart | CHIEF SCI OFCR, OPHTHALMOLOGY | Sell(S) | 3K | $13.86 | $35K |
| Jul 7, 2026 | Naylor Stuart | CHIEF SCI OFCR, OPHTHALMOLOGY | Sell(S) | 25K | $14.90 | $374K |
| Jun 25, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Grant(A) | 980K | — | $0 |
| Jun 25, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Grant(A) | 100K | — | $0 |
| Jun 25, 2026 | Naylor Stuart | CHIEF SCI OFCR, OPHTHALMOLOGY | Grant(A) | 70K | — | $0 |
| Jun 25, 2026 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Grant(A) | 100K | — | $0 |
| Jun 25, 2026 | Giroux Richard | CFO & COO | Grant(A) | 980K | — | $0 |
| Jun 11, 2026 | Yu Debra | Director | Grant(A) | 60K | — | $0 |
| Jun 11, 2026 | Shenk Thomas E | Director | Grant(A) | 70K | — | $0 |
| Jun 11, 2026 | Seligman Nicole | Director | Grant(A) | 60K | — | $0 |
| Jun 11, 2026 | Mendoza Neil | Director | Grant(A) | 67K | — | $0 |
| Jun 11, 2026 | Hukkelhoven Ellen | Director | Grant(A) | 60K | — | $0 |
| Jun 11, 2026 | Harris Keith R. | Director | Grant(A) | 106K | — | $0 |
| Jun 11, 2026 | Perceptive Advisors LLC | Director, 10% Owner | Grant(A) | 60K | — | $0 |
| Jun 10, 2026 | Harris Keith R. | Director | Option exercise(M) | 75K | — | — |
| Jun 10, 2026 | Harris Keith R. | Director | Option exercise(M) | 75K | — | $0 |
| May 27, 2026 | Giroux Richard | CFO & COO | Gift(G) | 7K | — | $0 |
| May 19, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell(S) | 62K | $9.17 | $569K |
| May 13, 2026 | Fleck Penny Renee | CHIEF DEVELOPMENT OFFICER | Grant(A) | 100K | — | $0 |
| May 13, 2026 | Fleck Penny Renee | CHIEF DEVELOPMENT OFFICER | Grant(A) | 100K | — | $0 |
| Apr 21, 2026 | Giroux Richard | CFO & COO | Sell(S) | 56K | $10.22 | $572K |
| Apr 17, 2026 | Perceptive Advisors LLC | Director, 10% Owner | Grant(A) | 556K | $9.00 | $5.0M |
| Apr 7, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Sell(S) | 28K | $9.36 | $259K |
| Mar 25, 2026 | Perceptive Advisors LLC | Director, 10% Owner | Disposed to issuer(D) | 400K | — | — |
| Mar 25, 2026 | Perceptive Advisors LLC | Director, 10% Owner | Disposed to issuer(D) | 300K | — | — |
| Mar 25, 2026 | Perceptive Advisors LLC | Director, 10% Owner | Grant(A) | 400K | — | — |
| Mar 25, 2026 | Perceptive Advisors LLC | Director, 10% Owner | Grant(A) | 300K | — | — |
| Mar 24, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell(S) | 62K | $7.41 | $459K |
| Feb 21, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Tax withholding(F) | 33K | $7.45 | $246K |
| Feb 21, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Option exercise(M) | 63K | — | — |
| Feb 21, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Option exercise(M) | 63K | — | $0 |
| Feb 21, 2026 | Giroux Richard | CFO & COO | Tax withholding(F) | 32K | $7.45 | $236K |
| Feb 21, 2026 | Giroux Richard | CFO & COO | Option exercise(M) | 60K | — | — |
| Feb 21, 2026 | Giroux Richard | CFO & COO | Option exercise(M) | 60K | — | $0 |
| Feb 21, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Tax withholding(F) | 12K | $7.45 | $88K |
| Feb 21, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Option exercise(M) | 25K | — | — |
| Feb 21, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Option exercise(M) | 25K | — | $0 |
| Feb 21, 2026 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Option exercise(M) | 8K | — | — |
| Feb 21, 2026 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Tax withholding(F) | 3K | $7.45 | $22K |
| Feb 21, 2026 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Option exercise(M) | 8K | — | $0 |
| Feb 21, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Tax withholding(F) | 6K | $7.45 | $44K |
| Feb 21, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Option exercise(M) | 11K | — | — |
| Feb 21, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Option exercise(M) | 11K | — | $0 |
| Jan 17, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Option exercise(M) | 310K | — | — |
| Jan 17, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Tax withholding(F) | 164K | $7.42 | $1.2M |
| Jan 17, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Option exercise(M) | 310K | — | $0 |
| Jan 17, 2026 | Giroux Richard | CFO & COO | Option exercise(M) | 310K | — | — |
| Jan 17, 2026 | Giroux Richard | CFO & COO | Tax withholding(F) | 164K | $7.42 | $1.2M |
| Jan 17, 2026 | Giroux Richard | CFO & COO | Option exercise(M) | 310K | — | $0 |
| Jan 17, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Option exercise(M) | 75K | — | — |
| Jan 17, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Tax withholding(F) | 35K | $7.42 | $262K |
| Jan 17, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Option exercise(M) | 75K | — | $0 |
| Jan 17, 2026 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Option exercise(M) | 35K | — | — |
| Jan 17, 2026 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Tax withholding(F) | 14K | $7.42 | $104K |
| Jan 17, 2026 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Option exercise(M) | 35K | — | $0 |
| Jan 17, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Option exercise(M) | 50K | — | — |
| Jan 17, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Tax withholding(F) | 27K | $7.42 | $202K |
| Jan 17, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Option exercise(M) | 50K | — | $0 |
| Jan 7, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Option exercise(M) | 63K | — | — |
| Jan 7, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Tax withholding(F) | 34K | $7.73 | $263K |
| Jan 7, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Option exercise(M) | 63K | — | $0 |
| Jan 7, 2026 | Giroux Richard | CFO & COO | Tax withholding(F) | 29K | $7.73 | $223K |
| Jan 7, 2026 | Giroux Richard | CFO & COO | Option exercise(M) | 53K | — | — |
| Jan 7, 2026 | Giroux Richard | CFO & COO | Option exercise(M) | 53K | — | $0 |
| Jan 7, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Tax withholding(F) | 18K | $7.73 | $136K |
| Jan 7, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Option exercise(M) | 38K | — | — |
| Jan 7, 2026 | Naylor Stuart | CHIEF DEV. OFFICER | Option exercise(M) | 38K | — | $0 |
| Jan 7, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Tax withholding(F) | 4K | $7.73 | $34K |
| Jan 7, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Option exercise(M) | 8K | — | — |
| Jan 7, 2026 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Option exercise(M) | 8K | — | $0 |
| Jan 7, 2026 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Tax withholding(F) | 8K | $7.73 | $60K |
| Dec 31, 2025 | Perceptive Life Sciences Master Fund Ltd | Director, 10% Owner | Disposed to issuer(D) | 2.3M | $7.91 | $18.2M |
| Dec 23, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Gift(G) | 6K | — | $0 |
| Nov 20, 2025 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Gift(G) | 5K | — | $0 |
| Oct 21, 2025 | Giroux Richard | CFO & COO | Sell(S) | 24K | $8.87 | $213K |
| Oct 7, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell(S) | 48K | $8.39 | $399K |
| Jul 22, 2025 | Giroux Richard | CFO & COO | Sell(S) | 24K | $8.52 | $204K |
| Jul 8, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell(S) | 48K | $7.97 | $379K |
| Jun 30, 2025 | Giroux Richard | CFO & COO | Gift(G) | 5K | — | $0 |
| Jun 12, 2025 | Edelman Joseph | Director, 10% Owner | Grant(A) | 45K | — | $0 |
| Jun 12, 2025 | Harris Keith R. | Director | Grant(A) | 75K | — | $0 |
| Jun 12, 2025 | Hukkelhoven Ellen | Director | Grant(A) | 45K | — | $0 |
| Jun 12, 2025 | Mendoza Neil | Director | Grant(A) | 45K | — | $0 |
| Jun 12, 2025 | Seligman Nicole | Director | Grant(A) | 45K | — | $0 |
| Jun 12, 2025 | Shenk Thomas E | Director | Grant(A) | 45K | — | $0 |
| Jun 12, 2025 | Yu Debra | Director | Grant(A) | 45K | — | $0 |
| Jun 6, 2025 | Harris Keith R. | Director | Option exercise(M) | 75K | — | — |
| Jun 6, 2025 | Harris Keith R. | Director | Option exercise(M) | 75K | — | $0 |
| Apr 22, 2025 | Giroux Richard | CFO & COO | Sell(S) | 24K | $6.00 | $144K |
| Apr 8, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Sell(S) | 48K | $5.34 | $254K |
| Apr 3, 2025 | Naylor Stuart | CHIEF DEV. OFFICER | Grant(A) | 100K | — | $0 |
| Apr 3, 2025 | Wollin Robert J | GENERAL COUNSEL AND SECRETARY | Grant(A) | 100K | — | $0 |
| Apr 3, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Grant(A) | 950K | — | $0 |
| Apr 3, 2025 | Zeldin Robert K | CHIEF MEDICAL OFFICER | Grant(A) | 90K | — | $0 |
| Apr 3, 2025 | Giroux Richard | CFO & COO | Grant(A) | 950K | — | $0 |
| Feb 21, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Option exercise(M) | 125K | — | — |
| Feb 21, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Tax withholding(F) | 66K | $7.30 | $482K |
| Feb 21, 2025 | Forbes Alexandria | PRESIDENT & CEO, Director | Option exercise(M) | 125K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-08-28. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for MGTX