Arrowstreet Capital’s Repligen RGEN Stock Holding History

Arrowstreet Capital’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
2026 Q3	$838K	Sell	4,360 -13,462	-76%	-$2.19M	﹤0.01%	1588
2026 Q2	$2.43M	Buy	+17,822	New	+$2.19M	﹤0.01%	1487
2022 Q1	–	Sell	-144,517	Closed	-$38.3M	–	1480
2021 Q4	$38.3M	Sell	144,517 -49,322	-25%	-$13.3M	0.05%	332
2021 Q3	$56M	Sell	193,839 -14,449	-7%	-$3.71M	0.07%	292
2021 Q2	$41.6M	Sell	208,288 -43,383	-17%	-$8.42M	0.05%	373
2021 Q1	$48.9M	Sell	251,671 -60,329	-19%	-$12.4M	0.07%	298
2020 Q4	$59.8M	Buy	312,000 +68,522	+28%	+$12.5M	0.08%	232
2020 Q3	$35.9M	Buy	243,478 +156,283	+179%	+$22.3M	0.06%	336
2020 Q2	$10.8M	Buy	+87,195	New	+$10.3M	0.02%	749
2019 Q3	–	Sell	-11,864	Closed	-$1.02M	–	1686
2019 Q2	$1.02M	Sell	11,864 -37,133	-76%	-$2.53M	﹤0.01%	1055
2019 Q1	$2.9M	Buy	+48,997	New	+$2.82M	0.01%	982

Other funds holding RGEN

Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return

BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return

United Capital Financial Advisors Irving, Texas $18.4B AUM 17.63% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM

Invesco Atlanta, Georgia $1.27T AUM 50.62% 1-Year Est. Return

Massachusetts Financial Services Boston, Massachusetts $296B AUM 23.14% 1-Year Est. Return

State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return

William Blair Investment Management Chicago, Illinois $30.8B AUM 33.92% 1-Year Est. Return

Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return

Arrowstreet Capital's RGEN Position: Q3 2026 in Review

Arrowstreet Capital reduced its Repligen (RGEN) stake by 76% in Q3 2026, selling an estimated $2.19M and leaving 4,360 shares worth $838K. The position accounts for ﹤0.01% of the portfolio, ranked #1588.

Arrowstreet Capital first reported a position in RGEN in Q1 2019 and has held it in 11 quarters since. The position peaked at $59.8M in Q4 2020. 403 funds tracked by Wall St. Rank hold RGEN as of Q3 2026.

Arrowstreet Capital held 4,360 shares of Repligen worth $838K as of Q3 2026.
Arrowstreet Capital sold 13,462 Repligen shares in Q3 2026, an estimated $2.19M.
Repligen made up ﹤0.01% of Arrowstreet Capital's portfolio in Q3 2026, its #1588 holding.
Arrowstreet Capital first reported a position in Repligen in Q1 2019 and has held it in 11 quarters since.
Arrowstreet Capital's Repligen position peaked at $59.8M in Q4 2020.
403 funds tracked by Wall St. Rank held Repligen as of Q3 2026.

Based on Arrowstreet Capital's 13F filing for Q3 2026, filed 13 Nov 2026.