William Blair & Company
MGTX icon

William Blair & Company’s MeiraGTx Holdings MGTX Stock Holding History

William Blair & Company’s Portfolio MGTX Stock Details MGTX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.7M Buy
125,478
+56
+0% +$556 ﹤0.01% 819
2026
Q1 		$1.09M Buy
125,422
+22
+0% +$167 ﹤0.01% 916
2025
Q4 		$997K Sell
125,400
-7,133
-5% -$59.3K ﹤0.01% 944
2025
Q3 		$1.09M Hold
132,533
– – ﹤0.01% 896
2025
Q2 		$864K Hold
132,533
– – ﹤0.01% 940
2025
Q1 		$899K Hold
132,533
– – ﹤0.01% 914
2024
Q4 		$807K Buy
132,533
+400
+0.3% +$2.34K ﹤0.01% 961
2024
Q3 		$551K Hold
132,133
– – ﹤0.01% 1090
2024
Q2 		$556K Hold
132,133
– – ﹤0.01% 1060
2024
Q1 		$802K Hold
132,133
– – ﹤0.01% 938
2023
Q4 		$928K Hold
132,133
– – ﹤0.01% 875
2023
Q3 		$649K Hold
132,133
– – ﹤0.01% 976
2023
Q2 		$888K Hold
132,133
– – ﹤0.01% 876
2023
Q1 		$683K Hold
132,133
– – ﹤0.01% 941
2022
Q4 		$862K Sell
132,133
-15,577
-11% -$107K ﹤0.01% 873
2022
Q3 		$1.24M Sell
147,710
-400
-0.3% -$3.53K 0.01% 749
2022
Q2 		$1.12M Sell
148,110
-1,890
-1% -$18.3K 0.01% 807
2022
Q1 		$2.08M Hold
150,000
– – 0.01% 687
2021
Q4 		$3.56M Buy
+150,000
New +$2.87M 0.01% 571

Other funds holding MGTX

S
Sanofi Paris, France $534M AUM 205.96% 1-Year Est. Return
PA
Perceptive Advisors New York $6.66B AUM 360.84% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
JJ
Johnson & Johnson New Brunswick, New Jersey $799M AUM 253.51% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
OM
Opaleye Management Boston, Massachusetts $1.1B AUM 197.64% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
6CM
683 Capital Management New York $2.04B AUM 94.26% 1-Year Est. Return
WP
Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return

William Blair & Company's MGTX Position: Q2 2026 in Review

William Blair & Company increased its MeiraGTx Holdings (MGTX) stake by 0.04% in Q2 2026, buying an estimated $556 and bringing the position to 125,478 shares worth $1.7M. The position accounts for ﹤0.01% of the portfolio, ranked #819.

William Blair & Company first reported a position in MGTX in Q4 2021 and has held it in 19 quarters since. The position peaked at $3.56M in Q4 2021. 158 funds tracked by Wall St. Rank hold MGTX as of Q2 2026.

  • William Blair & Company held 125,478 shares of MeiraGTx Holdings worth $1.7M as of Q2 2026.
  • William Blair & Company bought 56 MeiraGTx Holdings shares in Q2 2026, an estimated $556.
  • MeiraGTx Holdings made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #819 holding.
  • William Blair & Company first reported a position in MeiraGTx Holdings in Q4 2021 and has held it in 19 quarters since.
  • William Blair & Company's MeiraGTx Holdings position peaked at $3.56M in Q4 2021.
  • 158 funds tracked by Wall St. Rank held MeiraGTx Holdings as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.