Jane Street’s AnaptysBio ANAB Stock Holding History

Jane Street’s Portfolio ANAB Stock Details ANAB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-105,200	Closed	-$5.1M	–	11485
2025 Q4	$5.1M	Buy	105,200 +72,600	+223%	+$2.83M	﹤0.01%	3195
2025 Q3	$998K	Buy	32,600 +21,700	+199%	+$498K	﹤0.01%	6314
2025 Q2	$242K	Buy	+10,900	New	+$228K	﹤0.01%	8218
2025 Q1	–	Sell	-88,800	Closed	-$1.18M	–	9354
2024 Q4	$1.18M	Buy	88,800 +38,800	+78%	+$940K	﹤0.01%	5067
2024 Q3	$1.68M	Buy	+50,000	New	+$1.71M	﹤0.01%	4848

Other funds holding ANAB

EcoR1 Capital San Francisco, California $2.36B AUM 204.53% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

TCM

Tang Capital Management San Diego, California $1.97B AUM 125.1% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

AAA

Affinity Asset Advisors New York $1.94B AUM 374.45% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

PAI

Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return

6CM

683 Capital Management New York $1.92B AUM 85.52% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Jane Street's ANAB Position: Q1 2026 in Review

Jane Street increased its AnaptysBio (ANAB) stake by 1.9% in Q1 2026, buying an estimated $85.6K and bringing the position to 86,038 shares worth $4.77M. The position accounts for ﹤0.01% of the portfolio, ranked #3591.

Jane Street first reported a position in ANAB in Q4 2017 and has held it in 22 quarters since. The position peaked at $5.55M in Q3 2025. 207 funds tracked by Wall St. Rank hold ANAB as of Q1 2026.

Jane Street held 86,038 shares of AnaptysBio worth $4.77M as of Q1 2026.
Jane Street bought 1,591 AnaptysBio shares in Q1 2026, an estimated $85.6K.
AnaptysBio made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #3591 holding.
Jane Street first reported a position in AnaptysBio in Q4 2017 and has held it in 22 quarters since.
Jane Street's AnaptysBio position peaked at $5.55M in Q3 2025.
207 funds tracked by Wall St. Rank held AnaptysBio as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.