William Blair Investment Management’s GeneDx Holdings WGS Stock Holding History

William Blair Investment Management’s Portfolio WGS Stock Details WGS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$96.2M	Buy	1,400,653 +625,384	+81%	+$35.5M	0.29%	103
2026 Q1	$49.8M	Sell	775,269 -33,941	-4%	-$3.09M	0.16%	138
2025 Q4	$105M	Sell	809,210 -410,928	-34%	-$56.4M	0.29%	97
2025 Q3	$131M	Sell	1,220,138 -411,264	-25%	-$44.8M	0.34%	82
2025 Q2	$151M	Buy	1,631,402 +442,414	+37%	+$34.7M	0.4%	74
2025 Q1	$105M	Buy	1,188,988 +518,993	+77%	+$45M	0.3%	99
2024 Q4	$51.5M	Buy	+669,995	New	+$46.8M	0.13%	152

Other funds holding WGS

Corvex Management New York $3.27B AUM 38.53% 1-Year Est. Return

Casdin Capital New York $2B AUM 147.21% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

AIM

ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return

FLAM

First Light Asset Management Edina, Minnesota $1.65B AUM 203.21% 1-Year Est. Return

DTC

Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return

William Blair Investment Management's WGS Position: Q2 2026 in Review

William Blair Investment Management increased its GeneDx Holdings (WGS) stake by 81% in Q2 2026, buying an estimated $35.5M and bringing the position to 1,400,653 shares worth $96.2M. The position accounts for 0.29% of the portfolio, ranked #103.

William Blair Investment Management first reported a position in WGS in Q4 2024 and has held it in 7 quarters since. The position peaked at $151M in Q2 2025. 223 funds tracked by Wall St. Rank hold WGS as of Q2 2026.

William Blair Investment Management held 1,400,653 shares of GeneDx Holdings worth $96.2M as of Q2 2026.
William Blair Investment Management bought 625,384 GeneDx Holdings shares in Q2 2026, an estimated $35.5M.
GeneDx Holdings made up 0.29% of William Blair Investment Management's portfolio in Q2 2026, its #103 holding.
William Blair Investment Management first reported a position in GeneDx Holdings in Q4 2024 and has held it in 7 quarters since.
William Blair Investment Management's GeneDx Holdings position peaked at $151M in Q2 2025.
223 funds tracked by Wall St. Rank held GeneDx Holdings as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.