Who owns ZLAB?
Institutional ownership of Zai Lab Limited from Form 13F, Q2 2026
93 institutional managers reported holding Zai Lab Limited (ZLAB) in Form 13F filings for Q2 2026, with 43,301,559 shares worth $823M. The largest reported holder was RTW Investments, LP. Managers that filed both quarters added a net 15,050,606 shares (+53.3%). 15 opened new positions and 21 sold out.
- Funds holding
- 93
- Value held
- $823M
- New / sold out
- 15 / 21
- Net shares, same filers
- +53.3%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of ZLAB
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| RTW Investments, LP | $125M | 15.2% | 6,574,032 | Unchanged |
| TCG Crossover Management, LLC | $117M | 14.2% | 6,137,627 | New |
| Ra Capital Management, L.p. | $109M | 13.3% | 5,743,533 | Added |
| ADAR1 Capital Management, LLC | $64.0M | 7.8% | 3,369,034 | Added |
| FMR LLC | $53.5M | 6.5% | 2,815,214 | Added |
| Goldman Sachs Group Inc | $44.0M | 5.3% | 2,315,480 | Added |
| Woodline Partners LP | $41.9M | 5.1% | 2,207,293 | New |
| Frazier Life Sciences Management, L.P. | $36.1M | 4.4% | 1,902,320 | Unchanged |
| Bamco Inc | $30.9M | 3.7% | 1,623,694 | Trimmed |
| Two Sigma Investments, LP | $24.7M | 3.0% | 1,299,394 | Added |
| Citadel Advisors LLC | $24.4M | 3.0% | 1,284,706 | Trimmed |
| Rock Springs Capital Management LP | $15.5M | 1.9% | 814,707 | Unchanged |
| BlackRock, Inc. | $12.6M | 1.5% | 664,462 | Trimmed |
| C WorldWide Group Holding A/S | $9.7M | 1.2% | 510,000 | Unchanged |
| Jane Street Group, LLC | $9.1M | 1.1% | 476,541 | Added |
| B Group, Inc. | $8.6M | 1.0% | 450,646 | Unchanged |
| Nantahala Capital Management, LLC | $7.6M | 0.9% | 400,000 | New |
| Schroder Investment Management Group | $7.2M | 0.9% | 393,167 | Unchanged |
| Nan Fung Trinity (hk) LTD | $6.6M | 0.8% | 346,466 | Unchanged |
| Aberdeen Group plc | $5.9M | 0.7% | 311,294 | Added |
| Citigroup Inc | $5.7M | 0.7% | 300,775 | Added |
| Spruce Street Capital LP | $5.3M | 0.6% | 279,110 | New |
| Ameriprise Financial Inc | $4.8M | 0.6% | 253,171 | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $4.7M | 0.6% | 246,982 | Added |
| Hennion & Walsh Asset Management, Inc. | $4.4M | 0.5% | 230,418 | Added |
Share of 13F holdings is each fund's shares as a share of the 43,301,559 ZLAB shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- TCG Crossover Management, LLC New+$117M
- Woodline Partners LP New+$41.9M
- Goldman Sachs Group Inc Added+$41.9M
- ADAR1 Capital Management, LLC Added+$36.9M
- FMR LLC Added+$29.5M
- Two Sigma Investments, LP Added+$18.8M
- Nantahala Capital Management, LLC New+$7.6M
- Citigroup Inc Added+$5.7M
- Spruce Street Capital LP New+$5.3M
- Jane Street Group, LLC Added+$4.0M
Biggest sellers in Q2 2026
- UBS Group AG Trimmed-$8.3M
- Citadel Advisors LLC Trimmed-$7.7M
- Price T Rowe Associates Inc Sold out-$5.5M
- BlackRock, Inc. Trimmed-$3.8M
- Superstring Capital Management LP Trimmed-$2.3M
- Walleye Capital LLC Sold out-$1.8M
- Dimensional Fund Advisors LP Trimmed-$1.4M
- Barometer Capital Management Inc. Sold out-$1.3M
- TD Asset Management Inc Sold out-$704K
- Point72 Asset Management, L.P. Sold out-$661K
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $325M and sold $39.2M; 28 added and 28 trimmed.
Schedule 13D and 13G filings on ZLAB
Owners of more than 5% must file within days, so these can be newer than the 13F data.
- 2026-04-06RA CAPITAL MANAGEMENT, L.P. SCHEDULE 13G filed by Zai Lab LimitedSchedule 13G
- 2026-02-17RTW INVESTMENTS, LP SCHEDULE 13G filed by Zai Lab LimitedSchedule 13G
- 2025-11-12WELLINGTON MANAGEMENT GROUP LLP SCHEDULE 13G filed by Zai Lab LimitedSchedule 13G
- 2025-08-14RTW INVESTMENTS, LP SCHEDULE 13G filed by Zai Lab LimitedSchedule 13G
- 2025-02-12FMR LLC SCHEDULE 13G filed by Zai Lab LimitedSchedule 13G
Questions about ZLAB ownership
- Who owns ZLAB stock?
- 93 institutional investment managers reported ZLAB positions in their Form 13F filings for Q2 2026, holding 43,301,559 shares worth $823M in total. RTW Investments, LP reported the largest position.
- Are funds buying or selling ZLAB?
- In Q2 2026, 15 managers opened new ZLAB positions, 28 added, 28 trimmed and 21 sold out. Managers that filed in both quarters added a net 15,050,606 shares.
- How current is this ZLAB institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to ZLAB by CUSIP. Options are left out. ZLAB news and filings · ZLAB insider trades · Top funds