EcoR1 Capital’s Atreca, Inc. Class A Common Stock BCEL Stock Holding History

EcoR1 Capital’s Portfolio BCEL Stock Details BCEL Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2022 Q2	–	Sell	-358,780	Closed	-$1.14M	–	97
2022 Q1	$1.14M	Buy	+358,780	New	+$870K	0.04%	75
2021 Q3	–	Sell	-2,426,685	Closed	-$20.7M	–	80
2021 Q2	$20.7M	Hold	2,426,685	–	–	0.77%	29
2021 Q1	$37.2M	Hold	2,426,685	–	–	1.65%	18
2020 Q4	$39.2M	Hold	2,426,685	–	–	2.11%	17
2020 Q3	$33.9M	Buy	2,426,685 +937,500	+63%	+$14M	2.42%	15
2020 Q2	$31.7M	Buy	1,489,185 +383,005	+35%	+$6.77M	2.34%	17
2020 Q1	$18.3M	Sell	1,106,180 -375,231	-25%	-$6.8M	1.91%	18
2019 Q4	$22.9M	Hold	1,481,411	–	–	2.07%	18
2019 Q3	$18.1M	Sell	1,481,411 -5,568	-0.4%	-$84.6K	2.29%	14
2019 Q2	$28M	Buy	+1,486,979	New	+$26.8M	2.83%	13

Other funds holding BCEL

BBA

Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return

Boxer Capital San Diego, California $2.04B AUM 108.39% 1-Year Est. Return

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

Gates Foundation Seattle, Washington $43.5M AUM 14.19% 1-Year Est. Return

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

Redmile Group San Francisco, California $1.49B AUM 208.7% 1-Year Est. Return

Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

LCM

Laurion Capital Management New York $3.9B AUM 75.03% 1-Year Est. Return

RSCM

Rock Springs Capital Management Baltimore, Maryland $2.05B AUM 161.37% 1-Year Est. Return

Samsara BioCapital Palo Alto, California $1.22B AUM 242.83% 1-Year Est. Return

EcoR1 Capital's BCEL Position: Q2 2022 in Review

EcoR1 Capital sold out of Atreca, Inc. Class A Common Stock (BCEL) in Q2 2022, closing a stake of 358,780 shares — an estimated $1.14M sold.

EcoR1 Capital first reported a position in BCEL in Q2 2019 and held it in 10 quarters. The position peaked at $39.2M in Q4 2020. 80 funds tracked by Wall St. Rank hold BCEL as of Q2 2022.

EcoR1 Capital reported no remaining Atreca, Inc. Class A Common Stock position as of Q2 2022 after selling out during the quarter.
EcoR1 Capital sold 358,780 Atreca, Inc. Class A Common Stock shares in Q2 2022, an estimated $1.14M.
EcoR1 Capital first reported a position in Atreca, Inc. Class A Common Stock in Q2 2019 and held it in 10 quarters.
EcoR1 Capital's Atreca, Inc. Class A Common Stock position peaked at $39.2M in Q4 2020.
80 funds tracked by Wall St. Rank held Atreca, Inc. Class A Common Stock as of Q2 2022.

Based on EcoR1 Capital's 13F filing for Q2 2022, filed 15 Aug 2022.