Jim Simons
ZLAB icon

Jim Simons’s Zai Lab ZLAB Stock Holding History

Jim Simons’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
2026
Q1 		$269K Buy
+14,300
New +$265K ﹤0.01% 2828
2025
Q3 		– Sell
-232,900
Closed -$8.14M – 4009
2025
Q2 		$8.14M Buy
232,900
+148,400
+176% +$4.88M 0.01% 1204
2025
Q1 		$3.05M Sell
84,500
-103,300
-55% -$3.18M ﹤0.01% 1730
2024
Q4 		$4.92M Buy
187,800
+99,500
+113% +$2.76M 0.01% 1463
2024
Q3 		$2.13M Buy
88,300
+60,086
+213% +$1.14M ﹤0.01% 1971
2024
Q2 		$489K Buy
28,214
+13,514
+92% +$238K ﹤0.01% 2697
2024
Q1 		$235K Buy
14,700
+3,800
+35% +$80K ﹤0.01% 3177
2023
Q4 		$298K Buy
10,900
+600
+6% +$15.8K ﹤0.01% 2991
2023
Q3 		$250K Sell
10,300
-2,400
-19% -$63.9K ﹤0.01% 3013
2023
Q2 		$352K Sell
12,700
-24,100
-65% -$788K ﹤0.01% 3062
2023
Q1 		$1.22M Sell
36,800
-73,900
-67% -$2.84M ﹤0.01% 2343
2022
Q4 		$3.4M Buy
110,700
+82,000
+286% +$2.59M ﹤0.01% 1741
2022
Q3 		$982K Sell
28,700
-95,414
-77% -$4.08M ﹤0.01% 2511
2022
Q2 		$4.3M Buy
+124,114
New +$4.38M 0.01% 1674
2022
Q1 		– Sell
-345,200
Closed -$21.7M – 4537
2021
Q4 		$21.7M Buy
345,200
+88,500
+34% +$7.5M 0.03% 663
2021
Q3 		$27.1M Buy
+256,700
New +$36.9M 0.03% 536
2021
Q2 		– Sell
-81,100
Closed -$10.8M – 3827
2021
Q1 		$10.8M Buy
+81,100
New +$12.6M 0.01% 1144
2020
Q2 		– Sell
-182,831
Closed -$9.41M – 3816
2020
Q1 		$9.41M Sell
182,831
-128,800
-41% -$6.71M 0.01% 1203
2019
Q4 		$13M Sell
311,631
-57,000
-15% -$2.1M 0.01% 1280
2019
Q3 		$11.9M Sell
368,631
-19,900
-5% -$683K 0.01% 1274
2019
Q2 		$13.5M Buy
388,531
+220,731
+132% +$6.5M 0.01% 1207
2019
Q1 		$4.95M Buy
167,800
+145,800
+663% +$3.99M ﹤0.01% 1817
2018
Q4 		$511K Buy
+22,000
New +$408K ﹤0.01% 2853

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 $6.73T AUM 46.02% 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 $4.15B AUM 13.14% 1-Year Est. Return

Jim Simons's ZLAB Position: Q1 2026 in Review

Jim Simons opened a new position in Zai Lab (ZLAB) in Q1 2026: 14,300 shares worth $269K. The stake represents ﹤0.01% of the portfolio and ranks #2828 among its holdings. This is a return to the name: Jim Simons previously reported a position in ZLAB as recently as Q2 2025.

Jim Simons first reported a position in ZLAB in Q4 2018 and has held it in 23 quarters since. The position peaked at $27.1M in Q3 2021. 99 funds tracked by Wall St. Rank hold ZLAB as of Q1 2026.

  • Jim Simons held 14,300 shares of Zai Lab worth $269K as of Q1 2026.
  • Zai Lab was a new Jim Simons position in Q1 2026.
  • Zai Lab made up ﹤0.01% of Jim Simons's portfolio in Q1 2026, its #2828 holding.
  • Jim Simons first reported a position in Zai Lab in Q4 2018 and has held it in 23 quarters since.
  • Jim Simons's Zai Lab position peaked at $27.1M in Q3 2021.
  • 99 funds tracked by Wall St. Rank held Zai Lab as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.