Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MGTX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Sanofi | 12.2M | $105.6M | 0.0% | 13.171% | 31.44% |
| 2 | PERCEPTIVE ADVISORS LLC | 10.3M | $89.3M | 0.0% | 11.150% | 1.77% |
| 3 | Rubric Capital Management LP | 7.0M | $60.6M | +13.4% | 7.559% | 0.74% |
| 4 | JOHNSON & JOHNSON | 6.6M | $57.5M | 0.0% | 7.171% | 8.82% |
| 5 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 4.0M | $34.6M | 0.0% | 4.319% | 0.05% |
| 6 | MILLENNIUM MANAGEMENT LLC | 3.5M | $30.0M | +9.1% | 3.742% | 0.02% |
| 7 | BlackRock, Inc. | 3.2M | $27.4M | +3.2% | 3.421% | 0.00% |
| 8 | Prosight Management, LP | 2.6M | $22.8M | -18.1% | 2.840% | 3.73% |
| 9 | 683 Capital Management, LLC | 2.5M | $21.2M | -4.3% | 2.645% | 1.64% |
| 10 | Opaleye Management Inc. | 2.1M | $18.4M | +443.3% | 2.293% | 2.42% |
| 11 | MORGAN STANLEY | 1.6M | $13.8M | -13.1% | 1.717% | 0.00% |
| 12 | Knoll Capital Management, LLC | 1.3M | $10.8M | 0.0% | 1.350% | 6.01% |
| 13 | KENNEDY CAPITAL MANAGEMENT, INC. | 858K | $7.4M | +1113.5% | 0.927% | 0.16% |
| 14 | STATE STREET CORP | 753K | $6.5M | +3.3% | 0.814% | 0.00% |
| 15 | Logos Global Management LP | 700K | $6.1M | — | 0.756% | 0.30% |
| 16 | Erste Asset Management GmbH | 720K | $5.8M | -8.9% | 0.777% | 0.05% |
| 17 | GEODE CAPITAL MANAGEMENT, LLC | 585K | $5.1M | +1.9% | 0.632% | 0.00% |
| 18 | Long Focus Capital Management, LLC | 525K | $4.5M | 0.0% | 0.567% | 0.13% |
| 19 | GOLDMAN SACHS GROUP INC | 441K | $3.8M | -3.4% | 0.477% | 0.00% |
| 20 | D. E. Shaw & Co., Inc. | 425K | $3.7M | +11.4% | 0.459% | 0.00% |
| 21 | VANGUARD PORTFOLIO MANAGEMENT LLC | 397K | $3.4M | — | 0.429% | 0.00% |
| 22 | UBS Group AG | 303K | $2.6M | +36.6% | 0.327% | 0.00% |
| 23 | Woodline Partners LP | 300K | $2.6M | 0.0% | 0.324% | 0.01% |
| 24 | NORTHERN TRUST CORP | 272K | $2.4M | +5.3% | 0.294% | 0.00% |
| 25 | BANK OF AMERICA CORP /DE/ | 245K | $2.1M | +17.5% | 0.265% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in MGTX — a direct measure of their conviction.
Filings activity in MGTX during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 129 | +1.6% | 65.08% | +7.08 pp | $578M | +12% |
| Q4 2025 | 127 | +7.6% | 58.00% | 1.34 pp | $515M | 2.3% |
| Q3 2025 | 118 | +7.3% | 59.34% | +12.50 pp | $527M | +27% |
| Q2 2025 | 110 | 6.0% | 46.84% | +1.20 pp | $416M | +2.6% |
| Q1 2025 | 117 | +16% | 45.64% | +5.97 pp | $405M | +15% |
| Q4 2024 | 101 | +3.1% | 39.67% | +18.58 pp | $352M | +88% |
| Q3 2024 | 98 | +5.4% | 21.09% | +0.29 pp | $187M | +1.4% |
| Q2 2024 | 93 | — | 20.80% | — | $185M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MGTX stock.
Based on Q1 2026 13F filings, institutional ownership of MeiraGTx Holdings plc stands at 65.1%, held across 129 reporting institutions.
Sanofi is the largest reported institutional holder of MGTX, with approximately 12,197,737 shares worth $0.11B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of MGTX, including MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for MGTX is 60 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
21 institutions opened new positions in MGTX during Q1 2026, while 19 fully exited. 81 added to existing positions and 26 trimmed.
MGTX institutional ownership rose by 7.08 percentage points quarter-over-quarter, with a net change of +2 holders.
The top 10 institutions account for 80.9% of all reported 13F value in MGTX, and the top 25 account for 94.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
MeiraGTx Holdings plc (MGTX) Institutional Ownership