Zai Lab
ZLAB
138 hedge funds and large institutions have $1.19B invested in Zai Lab in 2025 Q3 according to their latest regulatory filings, with 21 funds opening new positions, 48 increasing their positions, 46 reducing their positions, and 38 closing their positions.
20% more funds holding in top 10
Funds holding in top 10: 5 → 6 (+1)
4% more repeat investments, than reductions
Existing positions increased: 48 | Existing positions reduced: 46
7% less call options, than puts
Call options by funds: $7.24M | Put options by funds: $7.79M
6.9% less ownership
Funds ownership: 38.36% → 31.47% (-6.9%)
12% less funds holding
Funds holding: 156 → 138 (-18)
20% less capital invested
Capital invested by funds: $1.49B → $1.19B (-$298M)
45% less first-time investments, than exits
New positions opened: 21 | Existing positions closed: 38
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$27.4M |
| 2 |
Citadel Advisors
Miami,
Florida
|
+$21.4M |
| 3 |
Wellington Management Group
Boston,
Massachusetts
|
+$11.8M |
| 4 |
FLSM
Frazier Life Sciences Management
Palo Alto,
California
|
+$11M |
| 5 |
Legal & General Group
London,
United Kingdom
|
+$10.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RI
RTW Investments
New York
|
-$112M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$51.5M |
| 3 |
WP
Woodline Partners
San Francisco,
California
|
-$34.5M |
| 4 |
Jennison Associates
New York
|
-$20.7M |
| 5 |
ClearBridge Investments
New York
|
-$17M |
ZLAB Hedge Fund Activity: Q3 2025 in Review
138 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Zai Lab (ZLAB) for Q3 2025, worth a combined $1.19B — down 20% from $1.49B a quarter earlier.
Sellers outnumbered buyers: 38 funds closed out of ZLAB and 21 opened new positions — a net loss of 17 holders — while 46 trimmed existing stakes and 48 added.
The largest buyer was T. Rowe Price Associates, adding an estimated $27.4M. The largest seller was RTW Investments, cutting an estimated $112M.
- 138 institutional investors held Zai Lab (ZLAB) as of Q3 2025, down from 156 in Q2 2025.
- Funds reported $1.19B of Zai Lab stock for Q3 2025, down 20% quarter-over-quarter.
- 21 funds opened new Zai Lab positions in Q3 2025 and 38 closed out, a net change of -17 holders.
- The largest Zai Lab buyer in Q3 2025 was T. Rowe Price Associates, an estimated $27.4M added.
- The largest Zai Lab seller in Q3 2025 was RTW Investments, an estimated $112M sold.
Based on aggregated 13F filings for Q3 2025.