MeiraGTx Holdings plc (MGTX) Institutional Shareholders
MeiraGTx Holdings plc (MGTX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $1.06B in MGTX holdings during the latest filing period.
Sanofi is currently the largest disclosed institutional shareholder of MGTX tracked by InsiderSet, reporting ownership valued at approximately $164.79M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $161.62M, representing an estimated loss of -1.92% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 74% of the total disclosed MGTX value among the investors covered in this analysis. Major shareholders include Sanofi, Perceptive Advisors Llc, Rubric Capital Management Lp, and several other long-term asset managers with concentrated positions in MeiraGTx Holdings plc (MGTX).
This page ranks the largest institutional MGTX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
153
Total Reported Value
$1.06B
Largest Holder
Sanofi
Largest Position
$164.79M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
110
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Sanofi | 30.86% | 12,197,737 | $164,791,427 | $161,620,015 | -$3,171,412 | -1.92% | |
| Perceptive Advisors Llc | 2.26% | 10,786,658 | $145,727,749 | $142,923,219 | -$2,804,531 | -1.92% | |
| Rubric Capital Management Lp | 1.13% | 9,100,000 | $122,941,000 | $120,575,000 | -$2,366,000 | -1.92% | |
| Johnson & Johnson | 11.23% | 6,641,064 | $89,720,775 | $87,994,098 | -$1,726,677 | -1.92% | |
| Blackrock, Inc. | 0.00% | 4,757,178 | $64,269,475 | $63,032,609 | -$1,236,867 | -1.92% | |
| Adage Capital Partners Gp, L.L.C. | 0.08% | 4,400,000 | $59,444,000 | $58,300,000 | -$1,144,000 | -1.92% | |
| Opaleye Management Inc. | 4.34% | 3,550,000 | $47,960,500 | $47,037,500 | -$923,000 | -1.92% | |
| Millennium Management Llc | 0.03% | 2,971,752 | $40,148,370 | $39,375,714 | -$772,656 | -1.92% | |
| 683 Capital Management, Llc | 2.86% | 2,300,000 | $31,073,000 | $30,475,000 | -$598,000 | -1.92% | |
| Woodline Partners Lp | 0.06% | 1,500,135 | $20,266,824 | $19,876,789 | -$390,035 | -1.92% | |
| State Street Corp | 0.00% | 1,393,222 | $18,822,429 | $18,460,192 | -$362,238 | -1.92% | |
| Morgan Stanley | 0.00% | 1,312,703 | $17,734,617 | $17,393,315 | -$341,302 | -1.92% | |
| Knoll Capital Management, Llc | 7.88% | 1,250,000 | $16,887,500 | $16,562,500 | -$325,000 | -1.92% | |
| Kennedy Capital Management Llc | 0.26% | 1,105,421 | $14,934,238 | $14,646,828 | -$287,410 | -1.92% | |
| Long Focus Capital Management, Llc | 0.60% | 1,080,300 | $14,594,853 | $14,313,975 | -$280,878 | -1.92% | |
| Jacobs Levy Equity Management, Inc | 0.05% | 1,015,106 | $13,714,082 | $13,450,155 | -$263,928 | -1.92% | |
| D. E. Shaw & Co., Inc. | 0.01% | 852,902 | $11,522,706 | $11,300,952 | -$221,755 | -1.92% | |
| Heights Capital Management, Inc | 2.65% | 850,000 | $11,483,500 | $11,262,500 | -$221,000 | -1.92% | |
| Geode Capital Management, Llc | 0.00% | 849,082 | $11,471,097 | $11,250,337 | -$220,761 | -1.92% | |
| Vanguard Portfolio Management Llc | 0.00% | 723,563 | $9,775,336 | $9,587,210 | -$188,126 | -1.92% | |
| Citadel Advisors Llc | 0.01% | 650,489 | $8,788,106 | $8,618,979 | -$169,127 | -1.92% | |
| Erste Asset Management Gmbh | 0.07% | 691,200 | $8,667,648 | $9,158,400 | +$490,752 | +5.66% | |
| Nuveen, Llc | 0.00% | 639,459 | $8,639,091 | $8,472,832 | -$166,259 | -1.92% | |
| J. Goldman & Co Lp | 0.29% | 601,972 | $8,132,642 | $7,976,129 | -$156,513 | -1.92% | |
| Pfm Health Sciences, Lp | 0.53% | 455,286 | $6,150,914 | $6,032,540 | -$118,375 | -1.92% | |
| Hennion & Walsh Asset Management, Inc. | 0.16% | 421,979 | $5,700,936 | $5,591,222 | -$109,714 | -1.92% | |
| Northern Trust Corp | 0.00% | 409,855 | $5,537,141 | $5,430,579 | -$106,562 | -1.92% | |
| Panagora Asset Management Inc | 0.01% | 350,174 | $4,730,851 | $4,639,806 | -$91,046 | -1.92% | |
| Goldman Sachs Group Inc | 0.00% | 327,416 | $4,423,390 | $4,338,262 | -$85,128 | -1.92% | |
| Bank Of America Corp | 0.00% | 289,720 | $3,914,117 | $3,838,790 | -$75,327 | -1.92% | |
| Point72 Asset Management, L.P. | 0.00% | 202,393 | $2,734,329 | $2,681,707 | -$52,622 | -1.92% | |
| Ghisallo Capital Management Llc | 0.05% | 200,000 | $2,702,000 | $2,650,000 | -$52,000 | -1.92% | |
| Aqr Capital Management Llc | 0.00% | 196,583 | $2,655,837 | $2,604,725 | -$51,112 | -1.92% | |
| Privium Fund Management B.V. | 0.49% | 196,112 | $2,649,473 | $2,598,484 | -$50,989 | -1.92% | |
| Jpmorgan Chase & Co | 0.00% | 205,212 | $2,573,360 | $2,719,059 | +$145,699 | +5.66% | |
| Ubs Group Ag | 0.00% | 184,574 | $2,493,594 | $2,445,606 | -$47,989 | -1.92% | |
| Squarepoint Ops Llc | 0.00% | 162,412 | $2,194,186 | $2,151,959 | -$42,227 | -1.92% | |
| Y-Intercept (Hong Kong) Ltd | 0.04% | 148,065 | $2,000,358 | $1,961,861 | -$38,497 | -1.92% | |
| Russell Investments Group, Ltd. | 0.00% | 147,329 | $1,990,413 | $1,952,109 | -$38,304 | -1.92% | |
| Wellington Management Group Llp | 0.00% | 142,923 | $1,930,890 | $1,893,730 | -$37,160 | -1.92% | |
| Charles Schwab Investment Management Inc | 0.00% | 142,434 | $1,924,283 | $1,887,251 | -$37,033 | -1.92% | |
| Bank Of New York Mellon Corp | 0.00% | 138,352 | $1,869,129 | $1,833,164 | -$35,965 | -1.92% | |
| Blair William & Co/Il | 0.00% | 125,478 | $1,695,208 | $1,662,584 | -$32,625 | -1.92% | |
| Voleon Capital Management Lp | 0.03% | 117,790 | $1,591,343 | $1,560,718 | -$30,626 | -1.92% | |
| Swiss National Bank | 0.00% | 111,400 | $1,505,014 | $1,476,050 | -$28,964 | -1.92% | |
| Barclays Plc | 0.00% | 98,955 | $1,336,882 | $1,311,154 | -$25,728 | -1.92% | |
| Invesco Ltd. | 0.00% | 94,540 | $1,277,235 | $1,252,655 | -$24,580 | -1.92% | |
| Alps Advisors Inc | 0.01% | 93,186 | $1,258,943 | $1,234,715 | -$24,229 | -1.92% | |
| Prosight Management, Lp | 0.21% | 90,000 | $1,215,900 | $1,192,500 | -$23,400 | -1.92% | |
| Aquatic Capital Management Llc | 0.04% | 87,064 | $1,176,235 | $1,153,598 | -$22,637 | -1.92% |
Frequently asked questions about MGTX
Who owns the most MGTX stock?
The largest holders of MGTX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MeiraGTx Holdings plc (MGTX).
Is MGTX widely held by superinvestors?
Many widely followed stocks like MGTX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MGTX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.