RI
ZLAB icon

RTW Investments’s Zai Lab ZLAB Stock Holding History

RTW Investments’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
Q2 		$125M Hold
6,574,032
– – 1.07% 31
2026
Q1 		$124M Sell
6,574,032
-385,000
-6% -$7.14M 1.23% 27
2025
Q4 		$123M Buy
6,959,032
+4,667,660
+204% +$109M 1.23% 24
2025
Q3 		$77.7M Sell
2,291,372
-3,245,504
-59% -$112M 0.96% 30
2025
Q2 		$194M Buy
5,536,876
+2,400,196
+77% +$78.9M 2.76% 14
2025
Q1 		$113M Buy
3,136,680
+627,561
+25% +$19.3M 1.73% 21
2024
Q4 		$65.7M Buy
+2,509,119
New +$69.6M 0.99% 29

Other funds holding ZLAB

TCM
TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
WP
Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return

RTW Investments's ZLAB Position: Q2 2026 in Review

RTW Investments held its Zai Lab (ZLAB) position steady in Q2 2026 at 6,574,032 shares worth $125M. The position accounts for 1.07% of the portfolio, ranked #31.

RTW Investments first reported a position in ZLAB in Q4 2024 and has held it in 7 quarters since. The position peaked at $194M in Q2 2025. 93 funds tracked by Wall St. Rank hold ZLAB as of Q2 2026.

  • RTW Investments held 6,574,032 shares of Zai Lab worth $125M as of Q2 2026.
  • RTW Investments left its Zai Lab share count unchanged in Q2 2026.
  • Zai Lab made up 1.07% of RTW Investments's portfolio in Q2 2026, its #31 holding.
  • RTW Investments first reported a position in Zai Lab in Q4 2024 and has held it in 7 quarters since.
  • RTW Investments's Zai Lab position peaked at $194M in Q2 2025.
  • 93 funds tracked by Wall St. Rank held Zai Lab as of Q2 2026.

Based on RTW Investments's 13F filing for Q2 2026, filed 14 Aug 2026.