MeiraGTx Holdings plc (MGTX) Insider Trading
Over the last 3 months, MGTX insiders made 0 open-market buys and 4 sales, a net sale of -$2.0M (SEC Form 4). Over the last 6 months, 130 institutions increased and 65 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
4
Net (3m)
-$2.0M
Insider trades by month Buys Sells
Oct
Mar
Apr
May
Jul
Aug
Context3-month price +40.1%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 18, 2026 | Forbes Alexandriadirector, officer: PRESIDENT & CEO | Sell | 62,000 | $13.86 |
| Jul 21, 2026 | Giroux Richardofficer: CFO & COO | Sell | 56,000 | $12.51 |
| Jul 7, 2026 | Naylor Stuartofficer: CHIEF SCI OFCR, OPHTHALMOLOGY | Sell | 2,547 | $13.86 |
| Jul 7, 2026 | Naylor Stuartofficer: CHIEF SCI OFCR, OPHTHALMOLOGY | Sell | 25,112 | $14.90 |
| Jun 29, 2026 | Forbes Alexandriadirector, officer: PRESIDENT & CEO | Grant | 980,000 | — |
| Jun 29, 2026 | Giroux Richardofficer: CFO & COO | Grant | 980,000 | — |
| Jun 29, 2026 | Naylor Stuartofficer: CHIEF SCI OFCR, OPHTHALMOLOGY | Grant | 70,000 | — |
| Jun 29, 2026 | Wollin Robert Jofficer: GENERAL COUNSEL AND SECRETARY | Grant | 100,000 | — |
| Jun 29, 2026 | Zeldin Robert Kofficer: CHIEF MEDICAL OFFICER | Grant | 100,000 | — |
| Jun 15, 2026 | Yu Debradirector | Grant | 60,000 | — |
| Jun 15, 2026 | Mendoza Neildirector | Grant | 66,641 | — |
| Jun 15, 2026 | Seligman Nicoledirector | Grant | 60,000 | — |
| Jun 15, 2026 | SHENK THOMAS Edirector | Grant | 69,662 | — |
| Jun 15, 2026 | PERCEPTIVE ADVISORS LLCdirector, 10 percent owner: | Grant | 60,000 | — |
| Jun 15, 2026 | Harris Keith R.director | Grant | 106,441 | — |
| Jun 15, 2026 | Hukkelhoven Ellendirector | Grant | 60,000 | — |
| Jun 10, 2026 | Harris Keith R.director | Option | 75,000 | — |
| May 19, 2026 | Forbes Alexandriadirector, officer: PRESIDENT & CEO | Sell | 62,000 | $9.17 |
| May 14, 2026 | Fleck Penny Reneeofficer: CHIEF DEVELOPMENT OFFICER | Grant | 100,000 | $9.97 |
| Apr 28, 2026 | Zeldin Robert Kofficer: CHIEF MEDICAL OFFICER | Tax | 7,814 | $7.73 |
| Apr 23, 2026 | PERCEPTIVE ADVISORS LLCdirector, 10 percent owner: | Grant | 300,000 | $20.00 |
| Apr 23, 2026 | PERCEPTIVE ADVISORS LLCdirector, 10 percent owner: | Grant | 555,555 | $9.00 |
| Apr 23, 2026 | PERCEPTIVE ADVISORS LLCdirector, 10 percent owner: | Grant | 400,000 | $15.00 |
| Apr 21, 2026 | Giroux Richardofficer: CFO & COO | Sell | 56,000 | $10.22 |
| Apr 7, 2026 | Naylor Stuartofficer: CHIEF DEV. OFFICER | Sell | 27,661 | $9.36 |
| Mar 24, 2026 | Forbes Alexandriadirector, officer: PRESIDENT & CEO | Sell | 62,000 | $7.41 |
| Feb 23, 2026 | Naylor Stuartofficer: CHIEF DEV. OFFICER | Tax | 11,750 | $7.45 |
| Feb 23, 2026 | Wollin Robert Jofficer: GENERAL COUNSEL AND SECRETARY | Tax | 5,949 | $7.45 |
| Feb 23, 2026 | Wollin Robert Jofficer: GENERAL COUNSEL AND SECRETARY | Option | 11,250 | — |
| Feb 23, 2026 | Zeldin Robert Kofficer: CHIEF MEDICAL OFFICER | Tax | 2,952 | $7.45 |
Source: MGTX SEC Form 4 filings, latest Aug 18, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their MGTX positions over the last 6 months (SEC Form 13F).
Increased
130
New positions
59
Reduced
65
Sold out
12
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| SANOFI | Unchanged | 12.2M | May 7, 2026 |
| Sanofi | Unchanged | 12.2M | Jul 28, 2026 |
| PERCEPTIVE ADVISORS LLC | Increased | 10.8M | Aug 14, 2026 |
| PERCEPTIVE ADVISORS LLC | Unchanged | 10.3M | May 29, 2026 |
| Rubric Capital Management LP | Increased | 9.1M | Aug 14, 2026 |
| RUBRIC CAPITAL MANAGEMENT LP | Increased | 7.0M | May 15, 2026 |
| JOHNSON & JOHNSON | Unchanged | 6.6M | Aug 6, 2026 |
| JOHNSON & JOHNSON | Reduced | 6.6M | May 13, 2026 |
| JOHNSON & JOHNSON | Unchanged | 6.6M | Mar 18, 2026 |
| BlackRock, Inc. | Increased | 4.8M | Aug 7, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Increased | 4.4M | Aug 14, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Unchanged | 4.0M | May 15, 2026 |
| Opaleye Management Inc. | Increased | 3.5M | Aug 14, 2026 |
| MILLENNIUM MANAGEMENT LLC | Increased | 3.5M | May 15, 2026 |
| BLACKROCK, INC. | Increased | 3.2M | May 13, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.