MeiraGTx Holdings plc (MGTX) Institutional Ownership Changes & 13F Activity
MeiraGTx Holdings plc (MGTX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Prosight Management, Lp, Rubric Capital Management Lp, Opaleye Management Inc., Woodline Partners Lp, and Jacobs Levy Equity Management, Inc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Buy | +3,840 | +29.1% | 17,030 | $230.07K | Q2 2026 | Sep 09, 2026 |
| Citadel Advisors Llc | Buy | +534,494 | +460.8% | 650,489 | $8.79M | Q2 2026 | Sep 02, 2026 |
| California State Teachers Retirement System | Buy | +58,103 | +2374.5% | 60,550 | $818.03K | Q2 2026 | Aug 24, 2026 |
| Mercer Global Advisors Inc | Buy | +14,501 | — | 14,501 | $195.91K | Q2 2026 | Aug 19, 2026 |
| Public Employees Retirement System Of Ohio | Buy | +30,700 | — | 30,700 | $414.76K | Q2 2026 | Aug 17, 2026 |
| Prosight Management, Lp | Sell | -2,539,971 | -96.6% | 90,000 | $1.22M | Q2 2026 | Aug 14, 2026 |
| Rubric Capital Management Lp | Buy | +2,100,000 | +30.0% | 9,100,000 | $122.94M | Q2 2026 | Aug 14, 2026 |
| Opaleye Management Inc. | Buy | +1,426,741 | +67.2% | 3,550,000 | $47.96M | Q2 2026 | Aug 14, 2026 |
| Woodline Partners Lp | Buy | +1,199,812 | +399.5% | 1,500,135 | $20.27M | Q2 2026 | Aug 14, 2026 |
| Jacobs Levy Equity Management, Inc | Buy | +1,001,433 | +7324.2% | 1,015,106 | $13.71M | Q2 2026 | Aug 14, 2026 |
| Heights Capital Management, Inc | Buy | +850,000 | — | 850,000 | $11.48M | Q2 2026 | Aug 14, 2026 |
| Long Focus Capital Management, Llc | Buy | +555,555 | +105.9% | 1,080,300 | $14.59M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Sell | -493,947 | -14.3% | 2,971,752 | $40.15M | Q2 2026 | Aug 14, 2026 |
| Perceptive Advisors Llc | Buy | +460,555 | +4.5% | 10,786,658 | $145.73M | Q2 2026 | Aug 14, 2026 |
| Pfm Health Sciences, Lp | Buy | +455,286 | — | 455,286 | $6.15M | Q2 2026 | Aug 14, 2026 |
| D. E. Shaw & Co., Inc. | Buy | +427,621 | +100.6% | 852,902 | $11.52M | Q2 2026 | Aug 14, 2026 |
| Adage Capital Partners Gp, L.L.C. | Buy | +400,000 | +10.0% | 4,400,000 | $59.44M | Q2 2026 | Aug 14, 2026 |
| J. Goldman & Co Lp | Buy | +395,762 | +191.9% | 601,972 | $8.13M | Q2 2026 | Aug 14, 2026 |
| Kennedy Capital Management Llc | Buy | +247,042 | +28.8% | 1,105,421 | $14.93M | Q2 2026 | Aug 14, 2026 |
| Ghisallo Capital Management Llc | Buy | +200,000 | — | 200,000 | $2.70M | Q2 2026 | Aug 14, 2026 |
| 683 Capital Management, Llc | Sell | -150,000 | -6.1% | 2,300,000 | $31.07M | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Buy | +143,828 | +773.9% | 162,412 | $2.19M | Q2 2026 | Aug 14, 2026 |
| Point72 Asset Management, L.P. | Buy | +131,440 | +185.2% | 202,393 | $2.73M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Sell | -113,998 | -25.8% | 327,416 | $4.42M | Q2 2026 | Aug 14, 2026 |
| Voleon Capital Management Lp | Buy | +95,431 | +426.8% | 117,790 | $1.59M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +94,540 | — | 94,540 | $1.28M | Q2 2026 | Aug 14, 2026 |
| Aquatic Capital Management Llc | Buy | +86,118 | +9103.4% | 87,064 | $1.18M | Q2 2026 | Aug 14, 2026 |
| Aqr Capital Management Llc | Buy | +85,590 | +77.1% | 196,583 | $2.66M | Q2 2026 | Aug 14, 2026 |
| Ameriprise Financial Inc | Buy | +64,368 | — | 64,368 | $869.61K | Q2 2026 | Aug 14, 2026 |
| Barclays Plc | Buy | +60,817 | +159.5% | 98,955 | $1.34M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about MGTX activity
Which institutional owners are buying MGTX?
Institutional owners buying MGTX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in MGTX activity?
"Buy" means an investor increased their reported position in MGTX compared to the prior reporting period. This reflects growing exposure to MeiraGTx Holdings plc (MGTX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in MGTX increasing?
Institutional interest in MGTX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.