Zai Lab
ZLAB
99 hedge funds and large institutions have $531M invested in Zai Lab in 2026 Q1 according to their latest regulatory filings, with 17 funds opening new positions, 26 increasing their positions, 43 reducing their positions, and 42 closing their positions.
4% more capital invested
Capital invested by funds: $511M → $531M (+$20.4M)
0.81% less ownership
Funds ownership: 25.85% → 25.04% (-0.81%)
21% less funds holding
Funds holding: 126 → 99 (-27)
40% less repeat investments, than reductions
Existing positions increased: 26 | Existing positions reduced: 43
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
60% less first-time investments, than exits
New positions opened: 17 | Existing positions closed: 42
96% less call options, than puts
Call options by funds: $226K | Put options by funds: $6.25M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCM
RA Capital Management
Boston,
Massachusetts
|
+$106M |
| 2 |
Two Sigma Investments
New York
|
+$5.19M |
| 3 |
BAMCO Inc
New York
|
+$4.45M |
| 4 |
Aberdeen Group
Edinburgh,
United Kingdom
|
+$4.41M |
| 5 |
BlackRock
New York
|
+$4.26M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
ClearBridge Investments
New York
|
-$31.9M |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$23.7M |
| 3 |
Wellington Management Group
Boston,
Massachusetts
|
-$13.3M |
| 4 |
RI
RTW Investments
New York
|
-$7.14M |
| 5 |
Bank of America
Charlotte,
North Carolina
|
-$6.86M |
ZLAB Hedge Fund Activity: Q1 2026 in Review
99 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Zai Lab (ZLAB) for Q1 2026, worth a combined $531M — up 4% from $511M a quarter earlier.
Sellers outnumbered buyers: 42 funds closed out of ZLAB and 17 opened new positions — a net loss of 25 holders — while 43 trimmed existing stakes and 26 added.
The largest buyer was RA Capital Management, opening a new position worth an estimated $106M. The largest seller was ClearBridge Investments, exiting entirely with an estimated $31.9M sold.
- 99 institutional investors held Zai Lab (ZLAB) as of Q1 2026, down from 126 in Q4 2025.
- Funds reported $531M of Zai Lab stock for Q1 2026, up 4% quarter-over-quarter.
- 17 funds opened new Zai Lab positions in Q1 2026 and 42 closed out, a net change of -25 holders.
- The largest Zai Lab buyer in Q1 2026 was RA Capital Management, an estimated $106M added.
- The largest Zai Lab seller in Q1 2026 was ClearBridge Investments, an estimated $31.9M sold.
Based on aggregated 13F filings for Q1 2026.