ABC Arbitrage’s Zai Lab ZLAB Stock Holding History

ABC Arbitrage’s Portfolio ZLAB Stock Details ZLAB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-10,388	Closed	-$352K	–	430
2025 Q3	$352K	Buy	+10,388	New	+$358K	0.03%	175
2025 Q2	–	Sell	-6,239	Closed	-$225K	–	276
2025 Q1	$225K	Buy	+6,239	New	+$192K	0.04%	184

Other funds holding ZLAB

RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return

FLSM

Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return

ClearBridge Investments New York $121B AUM 27.52% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return

ACM

ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return

RSCM

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

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

ABC Arbitrage's ZLAB Position: Q4 2025 in Review

ABC Arbitrage sold out of Zai Lab (ZLAB) in Q4 2025, closing a stake of 10,388 shares — an estimated $352K sold.

ABC Arbitrage first reported a position in ZLAB in Q1 2025 and held it in 2 quarters. The position peaked at $352K in Q3 2025. 126 funds tracked by Wall St. Rank hold ZLAB as of Q4 2025.

ABC Arbitrage reported no remaining Zai Lab position as of Q4 2025 after selling out during the quarter.
ABC Arbitrage sold 10,388 Zai Lab shares in Q4 2025, an estimated $352K.
ABC Arbitrage first reported a position in Zai Lab in Q1 2025 and held it in 2 quarters.
ABC Arbitrage's Zai Lab position peaked at $352K in Q3 2025.
126 funds tracked by Wall St. Rank held Zai Lab as of Q4 2025.

Based on ABC Arbitrage's 13F filing for Q4 2025, filed 4 Feb 2026.