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	–	98
2022 Q1	$1.14M	Buy	+358,780	New	+$870K	0.04%	75
2021 Q3	–	Sell	-2,426,685	Closed	-$20.7M	–	81
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	–	–	2.18%	17
2020 Q3	$33.9M	Buy	2,426,685 +937,500	+63%	+$14M	2.45%	15
2020 Q2	$31.7M	Buy	1,489,185 +383,005	+35%	+$6.77M	2.37%	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	–	–	2.17%	18
2019 Q3	$18.1M	Sell	1,481,411 -5,568	-0.4%	-$84.6K	2.42%	14
2019 Q2	$28M	Buy	+1,486,979	New	+$26.8M	2.89%	13

Other funds holding BCEL

Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return

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

BlackRock New York $5.7T AUM 30.48% 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 $1.51B AUM 164.17% 1-Year Est. Return

Renaissance Technologies

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Laurion Capital Management New York $1.07B AUM 75.73% 1-Year Est. Return

Rock Springs Capital Management Baltimore, Maryland $1.7B AUM 93.03% 1-Year Est. Return

Samsara BioCapital Palo Alto, California $1.03B AUM 214.94% 1-Year Est. Return