MeiraGTx Holdings plc (MGTX)
Nasdaq: MGTX · Biological Products, (No Diagnostic Substances) · New York, NY · filing with the SEC since 2018
Who owns MeiraGTx Holdings plc
As filed with the SECHolders of 5% or more
3
Perceptive Advisors LLC holds 12.6% of Ordinary Shares, nominal value $0.00003881 per share, as its SCHEDULE 13D/A filed Apr 24, 2026 says.
Directors and officers
16
report now, of 22 people on the record since 2018. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Perceptive Advisors LLC
SCHEDULE 13D/A · filed Apr 24, 2026 · Ordinary Shares, nominal value $0.00003881 per share · 12.9% in Jan 2, 2026
Rubric Capital Management LP
SCHEDULE 13G/A · filed Aug 14, 2026 · Ordinary Shares, $0.00003881 par value per share · 7.9% in Feb 13, 2026
Adena Estate Inc.
SCHEDULE 13G · filed Feb 9, 2024 · Ordinary shares, nominal value $0.00003881 per share
Adage Capital Management, L.P.
SCHEDULE 13G/A · filed May 13, 2026 · Ordinary Shares, par value $0.00003881 per share · reported falling below 5%, from 5.2% in Nov 13, 2025
Prosight Management, LP
SCHEDULE 13G/A · filed Feb 13, 2026 · Ordinary Shares, $0.00003881 par value per share · reported falling below 5%, from 5.4% in May 14, 2025
What MGTX reports owning in othersstakes of 5% or more, and other ties
18 subsidiaries in 5 countries, from the list filed with the 10-K filed Mar 30, 2026.
Insider tradesForm 4
11sales
0purchases
11sales on a scheduled plan
3people selling
$4.9Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Oct 20, 2025 to Oct 20, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Oct 20, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window3 of 25 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Giroux Richard | CFO & COO | 4 | $2.0M | 4 | 0 | $0 |
| Forbes Alexandria | PRESIDENT & CEO | 3 | $1.9M | 3 | 0 | $0 |
| Naylor Stuart | CHIEF SCI OFCR, OPHTHALMOLOGY | 4 | $1.0M | 4 | 0 | $0 |