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 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

Sanofi Paris, France $534M AUM 205.96% 1-Year Est. Return

Perceptive Advisors New York $5.12B AUM 314.02% 1-Year Est. Return

RCMNY

Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return

Johnson & Johnson New Brunswick, New Jersey $652M AUM 198.07% 1-Year Est. Return

Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Prosight Management Dallas, Texas $610M AUM 40.86% 1-Year Est. Return

6CM

683 Capital Management New York $1.92B AUM 85.52% 1-Year Est. Return

Opaleye Management Boston, Massachusetts $759M AUM 124.8% 1-Year Est. Return

William Blair & Company's MGTX Position: Q1 2026 in Review

William Blair & Company increased its MeiraGTx Holdings (MGTX) stake by 0.02% in Q1 2026, buying an estimated $167 and bringing the position to 125,422 shares worth $1.09M. The position accounts for ﹤0.01% of the portfolio, ranked #916.

William Blair & Company first reported a position in MGTX in Q4 2021 and has held it in 18 quarters since. The position peaked at $3.56M in Q4 2021. 133 funds tracked by Wall St. Rank hold MGTX as of Q1 2026.

William Blair & Company held 125,422 shares of MeiraGTx Holdings worth $1.09M as of Q1 2026.
William Blair & Company bought 22 MeiraGTx Holdings shares in Q1 2026, an estimated $167.
MeiraGTx Holdings made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #916 holding.
William Blair & Company first reported a position in MeiraGTx Holdings in Q4 2021 and has held it in 18 quarters since.
William Blair & Company's MeiraGTx Holdings position peaked at $3.56M in Q4 2021.
133 funds tracked by Wall St. Rank held MeiraGTx Holdings as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.