MeiraGTx Holdings
MGTX · NASDAQ
$9.97+$0.52 (+5.50%)TodayMarket closed ·
Prev close $9.45
Who owns MGTX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 62.0% of MGTX’s shares.
- Sanofi SA13.2%
- Perceptive Advisors LLC11.6%
- Rubric Capital Management LP9.8%
- Johnson & Johnson Innovation-JJDC, Inc.7.2%
- Next 6 largest institutions20.2%
- All other shareholders38.0%
| Holder | Shares | % of shares |
|---|---|---|
| Sanofi SA | 12.20M | 13.17% |
| Perceptive Advisors LLC | 10.79M | 11.65% |
| Rubric Capital Management LP | 9.10M | 9.83% |
| Johnson & Johnson Innovation-JJDC, Inc. | 6.64M | 7.17% |
| Adage Capital Management, L.P. | 4.40M | 4.75% |
| BlackRock Institutional Trust Company, N.A. | 3.96M | 4.28% |
| Opaleye Management Inc. | 3.55M | 3.83% |
| Millennium Management LLC | 2.97M | 3.21% |
| 683 Capital Management LLC | 2.30M | 2.48% |
| Woodline Partners LP | 1.50M | 1.62% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Russell 2000 ETF | 1.55M | 1.67% |
| Fidelity Small Cap Index Fund | 651.08K | 0.70% |
| iShares Biotechnology ETF | 526.07K | 0.57% |
| iShares Russell 2000 Growth ETF | 450.53K | 0.49% |
| Janus Henderson Small Cap Growth Alpha ETF | 434.67K | 0.47% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $3.40M (7 trades) of MGTX on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Naylor Stuart | Sale | 27.66K | $294.29K |
| SEBULSKY ALAN | Award | 100.00K | — |
| Forbes Alexandria | Sale | 62.00K | $859.32K |
| Giroux Richard | Sale | 56.00K | $700.56K |
| Naylor Stuart | Sale | 25.11K | $374.17K |
| Naylor Stuart | Sale | 2.55K | $35.30K |
| Yu Debra | Award | 60.00K | — |
| Hukkelhoven Ellen | Award | 60.00K | — |
| Harris Keith R. | Award | 106.44K | — |
| Mendoza Neil | Award | 66.64K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 6.00M
- Days to cover
- 5.04
- % of shares outstanding
- 6.48%
- Average daily volume
- 1.19M
- Change since last report
- +49.5%
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