Atika Capital Management’s Repligen RGEN Stock Holding History

Atika Capital Management’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
2023 Q4	–	Sell	-92,744	Closed	-$14.7M	–	93
2023 Q3	$14.7M	Hold	92,744	–	–	1.94%	18
2023 Q2	$13.1M	Sell	92,744 -17	-0%	-$2.73K	1.31%	25
2023 Q1	$15.6M	Hold	92,761	–	–	2.31%	11
2022 Q4	$15.7M	Buy	92,761 +8,761	+10%	+$1.59M	2.26%	13
2022 Q3	$15.7M	Hold	84,000	–	–	1.33%	30
2022 Q2	$13.6M	Buy	84,000 +3,000	+4%	+$474K	1.53%	24
2022 Q1	$15.2M	Hold	81,000	–	–	1.28%	34
2021 Q4	$21.5M	Sell	81,000 -2,400	-3%	-$647K	1.51%	26
2021 Q3	$24.1M	Buy	83,400 +1,400	+2%	+$359K	1.43%	19
2021 Q2	$16.4M	Hold	82,000	–	–	1.29%	27
2021 Q1	$15.9M	Sell	82,000 -12,000	-13%	-$2.46M	1.38%	21
2020 Q4	$18M	Buy	94,000 +10,500	+13%	+$1.91M	1.41%	15
2020 Q3	$12.3M	Sell	83,500 -500	-0.6%	-$71.5K	1.01%	36
2020 Q2	$10.4M	Sell	84,000 -9,300	-10%	-$1.09M	1.34%	25
2020 Q1	$9.01M	Buy	93,300 +8,300	+10%	+$801K	1.73%	16
2019 Q4	$7.86M	Buy	85,000 +15,000	+21%	+$1.26M	1.52%	25
2019 Q3	$5.37M	Buy	+70,000	New	+$6.12M	1.13%	37

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

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

Macquarie Group Sydney, NSW 2000, Australia $23.2B AUM 40.19% 1-Year Est. Return

BCM

Brown Capital Management Baltimore, Maryland $500M AUM 25.3% 1-Year Est. Return

Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return

Sands Capital Management Arlington, Virginia $26.9B AUM 34.44% 1-Year Est. Return

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

Atika Capital Management's RGEN Position: Q4 2023 in Review

Atika Capital Management sold out of Repligen (RGEN) in Q4 2023, closing a stake of 92,744 shares — an estimated $14.7M sold.

Atika Capital Management first reported a position in RGEN in Q3 2019 and held it in 17 quarters. The position peaked at $24.1M in Q3 2021. 466 funds tracked by Wall St. Rank hold RGEN as of Q4 2023.

Atika Capital Management reported no remaining Repligen position as of Q4 2023 after selling out during the quarter.
Atika Capital Management sold 92,744 Repligen shares in Q4 2023, an estimated $14.7M.
Atika Capital Management first reported a position in Repligen in Q3 2019 and held it in 17 quarters.
Atika Capital Management's Repligen position peaked at $24.1M in Q3 2021.
466 funds tracked by Wall St. Rank held Repligen as of Q4 2023.

Based on Atika Capital Management's 13F filing for Q4 2023, filed 13 Feb 2024.