Jane Street
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Jane Street’s Zai Lab ZLAB Stock Holding History

Jane Street’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
-30,600
Closed -$1.04M – 12609
2025
Q3 		$1.04M Buy
30,600
+3,100
+11% +$107K ﹤0.01% 6242
2025
Q2 		$962K Buy
27,500
+5,300
+24% +$174K ﹤0.01% 5692
2025
Q1 		$802K Sell
22,200
-9,200
-29% -$283K ﹤0.01% 5985
2024
Q4 		$822K Sell
31,400
-5,500
-15% -$153K ﹤0.01% 5753
2024
Q3 		$891K Buy
36,900
+10,100
+38% +$191K ﹤0.01% 6113
2024
Q2 		$464K Buy
+26,800
New +$471K ﹤0.01% 7140
2023
Q2 		– Sell
-10,200
Closed -$339K – 9705
2023
Q1 		$339K Sell
10,200
-46,000
-82% -$1.76M ﹤0.01% 6979
2022
Q4 		$1.73M Buy
56,200
+23,800
+73% +$751K ﹤0.01% 4081
2022
Q3 		$1.11M Buy
+32,400
New +$1.39M ﹤0.01% 5230
2022
Q2 		– Sell
-8,500
Closed -$374K – 11109
2022
Q1 		$374K Sell
8,500
-6,100
-42% -$295K ﹤0.01% 8017
2021
Q4 		$918K Sell
14,600
-58,500
-80% -$4.96M ﹤0.01% 6069
2021
Q3 		$7.7M Sell
73,100
-42,200
-37% -$6.06M ﹤0.01% 2149
2021
Q2 		$20.4M Buy
115,300
+98,200
+574% +$15.8M 0.01% 1061
2021
Q1 		$2.28M Buy
17,100
+12,100
+242% +$1.87M ﹤0.01% 3758
2020
Q4 		$677K Sell
5,000
-14,500
-74% -$1.48M ﹤0.01% 5283
2020
Q3 		$1.62M Buy
+19,500
New +$1.57M ﹤0.01% 3355

Other funds holding ZLAB

RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
RSCM
Rock Springs Capital Management Baltimore, Maryland $1.7B AUM 93.03% 1-Year Est. Return
CWG
C WorldWide Group Copenhagen, Denmark $4.66B AUM 11.67% 1-Year Est. Return

Jane Street's ZLAB Position: Q1 2026 in Review

Jane Street reduced its Zai Lab (ZLAB) stake by 30% in Q1 2026, selling an estimated $2.12M and leaving 267,926 shares worth $5.04M. The position accounts for ﹤0.01% of the portfolio, ranked #3509.

Jane Street first reported a position in ZLAB in Q3 2018 and has held it in 21 quarters since. The position peaked at $6.74M in Q4 2025. 99 funds tracked by Wall St. Rank hold ZLAB as of Q1 2026.

  • Jane Street held 267,926 shares of Zai Lab worth $5.04M as of Q1 2026.
  • Jane Street sold 114,136 Zai Lab shares in Q1 2026, an estimated $2.12M.
  • Zai Lab made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #3509 holding.
  • Jane Street first reported a position in Zai Lab in Q3 2018 and has held it in 21 quarters since.
  • Jane Street's Zai Lab position peaked at $6.74M in Q4 2025.
  • 99 funds tracked by Wall St. Rank held Zai Lab as of Q1 2026.

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