MGTX MeiraGTx Holdings plc
MeiraGTx Holdings plc (MGTX) Institutional Ownership
What the institutions did with MGTX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Sanofi | 12.2M | 15.4% |
| PERCEPTIVE ADVISORS LLC | 10.8M | 13.6% |
| Rubric Capital Management LP | 9.1M | 11.5% |
| JOHNSON & JOHNSON | 6.6M | 8.4% |
| BlackRock, Inc. | 4.8M | 6.0% |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 4.4M | 5.6% |
| Opaleye Management Inc. | 3.6M | 4.5% |
| MILLENNIUM MANAGEMENT LLC | 3.0M | 3.8% |
| 683 Capital Management, LLC | 2.3M | 2.9% |
| Woodline Partners LP | 1.5M | 1.9% |
| STATE STREET CORP | 1.4M | 1.8% |
| MORGAN STANLEY | 1.3M | 1.7% |
| Knoll Capital Management, LLC | 1.3M | 1.6% |
| KENNEDY CAPITAL MANAGEMENT LLC | 1.1M | 1.4% |
| Long Focus Capital Management, LLC | 1.1M | 1.4% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 1.0M | 1.3% |
| D. E. Shaw & Co., Inc. | 852.9K | 1.1% |
| HEIGHTS CAPITAL MANAGEMENT, INC | 850.0K | 1.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 849.1K | 1.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 723.6K | 0.9% |
| Erste Asset Management GmbH | 691.2K | 0.9% |
| CITADEL ADVISORS LLC | 650.5K | 0.8% |
| Nuveen, LLC | 639.5K | 0.8% |
| J. Goldman & Co LP | 602.0K | 0.8% |
| Jupiter Topco LLC | 475.8K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Prosight Management, LP | Reduced | 2.6M | 90.0K | -2.5M |
| Rubric Capital Management LP | Increased | 7.0M | 9.1M | +2.1M |
| BlackRock, Inc. | Increased | 3.2M | 4.8M | +1.6M |
| Opaleye Management Inc. | Increased | 2.1M | 3.6M | +1.4M |
| Woodline Partners LP | Increased | 300.3K | 1.5M | +1.2M |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Increased | 13.7K | 1.0M | +1.0M |
| HEIGHTS CAPITAL MANAGEMENT, INC | New | 0 | 850.0K | +850.0K |
| Logos Global Management LP | Sold Out | 700.0K | 0 | -700.0K |
| STATE STREET CORP | Increased | 753.4K | 1.4M | +639.8K |
| Long Focus Capital Management, LLC | Increased | 524.7K | 1.1M | +555.6K |
| CITADEL ADVISORS LLC | Increased | 116.0K | 650.5K | +534.5K |
| Nuveen, LLC | Increased | 132.5K | 639.5K | +507.0K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 3.5M | 3.0M | -493.9K |
| PERCEPTIVE ADVISORS LLC | Increased | 10.3M | 10.8M | +460.6K |
| PFM Health Sciences, LP | New | 0 | 455.3K | +455.3K |
| D. E. Shaw & Co., Inc. | Increased | 425.3K | 852.9K | +427.6K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Increased | 4.0M | 4.4M | +400.0K |
| J. Goldman & Co LP | Increased | 206.2K | 602.0K | +395.8K |
| PANAGORA ASSET MANAGEMENT INC | New | 0 | 350.2K | +350.2K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 397.3K | 723.6K | +326.3K |
| MORGAN STANLEY | Reduced | 1.6M | 1.3M | -277.2K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 584.9K | 849.1K | +264.2K |
| KENNEDY CAPITAL MANAGEMENT LLC | Increased | 858.4K | 1.1M | +247.0K |
| Ghisallo Capital Management LLC | New | 0 | 200.0K | +200.0K |
| JPMORGAN CHASE & CO | Increased | 24.3K | 205.2K | +180.9K |
| Jefferies Financial Group Inc. | Sold Out | 167.5K | 0 | -167.5K |
| 683 Capital Management, LLC | Reduced | 2.5M | 2.3M | -150.0K |
| Y-Intercept (Hong Kong) Ltd | New | 0 | 148.1K | +148.1K |
| Squarepoint Ops LLC | Increased | 18.6K | 162.4K | +143.8K |
| NORTHERN TRUST CORP | Increased | 271.9K | 409.9K | +138.0K |
| Point72 Asset Management, L.P. | Increased | 71.0K | 202.4K | +131.4K |
| UBS Group AG | Reduced | 303.2K | 184.6K | -118.6K |
| GOLDMAN SACHS GROUP INC | Reduced | 441.4K | 327.4K | -114.0K |
| Swiss National Bank | New | 0 | 111.4K | +111.4K |
| JANE STREET GROUP, LLC | Sold Out | 105.9K | 0 | -105.9K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 111.7K | 12.1K | -99.6K |
| Voleon Capital Management LP | Increased | 22.4K | 117.8K | +95.4K |
| PLATINUM INVESTMENT MANAGEMENT LTD | Sold Out | 93.9K | 0 | -93.9K |
| ALPS ADVISORS INC | New | 0 | 93.2K | +93.2K |
| Aquatic Capital Management LLC | Increased | 946 | 87.1K | +86.1K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 111.0K | 196.6K | +85.6K |
| Hennion & Walsh Asset Management, Inc. | Increased | 354.8K | 422.0K | +67.2K |
| AMERIPRISE FINANCIAL INC | New | 0 | 64.4K | +64.4K |
| FRANKLIN RESOURCES INC | New | 0 | 61.1K | +61.1K |
| BARCLAYS PLC | Increased | 38.1K | 99.0K | +60.8K |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 2.4K | 60.6K | +58.1K |
| Jump Financial, LLC | Sold Out | 56.3K | 0 | -56.3K |
| SEI INVESTMENTS CO | Reduced | 99.6K | 47.6K | -52.0K |
| Russell Investments Group, Ltd. | Increased | 97.2K | 147.3K | +50.2K |
| MARTINGALE ASSET MANAGEMENT L P | New | 0 | 47.9K | +47.9K |
| BANK OF AMERICA CORP /DE/ | Increased | 244.9K | 289.7K | +44.8K |
| Engineers Gate Manager LP | Increased | 26.8K | 69.1K | +42.3K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 100.2K | 142.4K | +42.2K |
| VANGUARD ASSET MANAGEMENT, Ltd | New | 0 | 40.3K | +40.3K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | New | 0 | 40.2K | +40.2K |
| STATE OF WISCONSIN INVESTMENT BOARD | Increased | 10.3K | 49.2K | +38.9K |
| Bank of New York Mellon Corp | Increased | 100.1K | 138.4K | +38.3K |
| WELLS FARGO & COMPANY/MN | Increased | 16.6K | 53.9K | +37.3K |
| Trexquant Investment LP | Reduced | 97.6K | 65.4K | -32.2K |
| AXQ CAPITAL, LP | New | 0 | 31.2K | +31.2K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.