Alyeska Investment Group’s Repligen RGEN Stock Holding History

Alyeska Investment Group’s Portfolio RGEN Stock Details RGEN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-123,000	Closed	-$16.4M	–	709
2025 Q3	$16.4M	Sell	123,000 -290,316	-70%	-$35.3M	0.05%	307
2025 Q2	$51.4M	Sell	413,316 -46,921	-10%	-$5.97M	0.18%	155
2025 Q1	$58.6M	Buy	460,237 +89,057	+24%	+$13.7M	0.23%	125
2024 Q4	$53.4M	Buy	+371,180	New	+$53.2M	0.2%	132
2023 Q3	–	Sell	-244,484	Closed	-$34.6M	–	605
2023 Q2	$34.6M	Sell	244,484 -153,519	-39%	-$24.6M	0.26%	127
2023 Q1	$67M	Buy	+398,003	New	+$71M	0.59%	49
2022 Q3	–	Sell	-141,357	Closed	-$23M	–	467
2022 Q2	$23M	Buy	141,357 +121,786	+622%	+$19.3M	0.26%	129
2022 Q1	$3.68M	Buy	+19,571	New	+$3.72M	0.04%	337
2017 Q3	–	Sell	-32,863	Closed	-$1.36M	–	525
2017 Q2	$1.36M	Buy	+32,863	New	+$1.25M	0.01%	379

Other funds holding RGEN

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

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

UCFA

United Capital Financial Advisors Irving, Texas $18.2B AUM 22.02% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

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

Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return

Alyeska Investment Group's RGEN Position: Q4 2025 in Review

Alyeska Investment Group sold out of Repligen (RGEN) in Q4 2025, closing a stake of 123,000 shares — an estimated $16.4M sold.

Alyeska Investment Group first reported a position in RGEN in Q2 2017 and held it in 9 quarters. The position peaked at $67M in Q1 2023. 474 funds tracked by Wall St. Rank hold RGEN as of Q4 2025.

Alyeska Investment Group reported no remaining Repligen position as of Q4 2025 after selling out during the quarter.
Alyeska Investment Group sold 123,000 Repligen shares in Q4 2025, an estimated $16.4M.
Alyeska Investment Group first reported a position in Repligen in Q2 2017 and held it in 9 quarters.
Alyeska Investment Group's Repligen position peaked at $67M in Q1 2023.
474 funds tracked by Wall St. Rank held Repligen as of Q4 2025.

Based on Alyeska Investment Group's 13F filing for Q4 2025, filed 13 Feb 2026.