ZLAB · Insider trading · 13F holders · Congress trades
Zai Lab Ltd (ZLAB)
Who is buying and selling ZLAB: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 13
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $235K
- Congress trades, 12 months
- 0
ZLAB at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 2 ZLAB insiders filed 3 sales worth $235K on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
- 13 13F filers hold ZLAB among their 50 largest positions, worth $498.4M combined, including Peter Kolchinsky. The biggest bets by portfolio weight are B Group, Inc. (4.9%), ADAR1 Capital Management, LLC (3.0%) and TCG Crossover Management, LLC (2.8%). In their latest 13Fs, 2 managers opened a new position and 2 added to one.
- No member of Congress has disclosed a trade in ZLAB.
- ZLAB last closed at $22.36 on Oct 29, 2026.
ZLAB insider trading
Between Aug 1, 2026 and Oct 29, 2026, 2 ZLAB insiders filed 3 sales worth $235K on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Aug 21, 2026 | Chen Yajing | Chief Financial Officer | Sale10b5-1 | 260 | $27.00 | $7K | SEC |
| Aug 13, 2026 | Lis William | Director | Sale10b5-1 | 8,506 | $25.00 | $213K | SEC |
| Aug 13, 2026 | Chen Yajing | Chief Financial Officer | Sale10b5-1 | 619 | $25.00 | $15K | SEC |
Who owns ZLAB? Hedge funds and superinvestors
13 13F filers hold ZLAB among their 50 largest positions, worth $498.4M combined, including Peter Kolchinsky. The biggest bets by portfolio weight are B Group, Inc. (4.9%), ADAR1 Capital Management, LLC (3.0%) and TCG Crossover Management, LLC (2.8%). In their latest 13Fs, 2 managers opened a new position and 2 added to one.
Superinvestors holding ZLAB: Peter Kolchinsky 0.9%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Rtw Investments, LPHedge fund | 1.1% | $124.9M | 6,574,032 | +0.0% shares | Q2 2026 |
| TCG Crossover Management, LLCHedge fund | 2.8% | $116.6M | 6,137,627 | New | Q2 2026 |
| Peter KolchinskyHedge fund | 0.9% | $109.1M | 5,743,533 | +0.6% shares | Q2 2026 |
| ADAR1 Capital Management, LLCHedge fund | 3.0% | $64.0M | 3,369,034 | +136.4% shares | Q2 2026 |
| Frazier Life Sciences Management, L.P.Hedge fund | 0.8% | $36.1M | 1,902,320 | +0.0% shares | Q2 2026 |
| Rock Springs Capital Management LPHedge fund | 0.8% | $15.5M | 814,707 | +0.0% shares | Q2 2026 |
| B Group, Inc.Hedge fund | 4.9% | $8.6M | 450,646 | +0.0% shares | Q2 2026 |
| Nan Fung Trinity (HK) LtdInvestment manager | 0.7% | $6.6M | 346,466 | +0.0% shares | Q2 2026 |
| Spruce Street Capital LPHedge fund | 1.0% | $5.3M | 279,110 | New | Q2 2026 |
| NEXTBio Capital Management LPHedge fund | 1.6% | $3.5M | 183,362 | +0.0% shares | Q2 2026 |
| Superstring Capital Management LPHedge fund | 1.9% | $3.0M | 155,813 | -43.5% shares | Q2 2026 |
| Seven Fleet Capital Management LPHedge fund | 0.5% | $2.9M | 136,016 | +74.7% shares | Q2 2026 |
| Privium Fund Management B.V.Asset manager | 0.4% | $2.3M | 122,189 | -7.6% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 13). Screen ZLAB in the grand portfolio →
ZLAB stock trades by members of Congress
No member of Congress has disclosed a trade in ZLAB.
Analysis mentioning ZLAB
Posts from the blog that cover Zai Lab Ltd, newest first.
ZLAB questions and answers
Are insiders buying ZLAB stock?
Between Aug 1, 2026 and Oct 29, 2026, 2 ZLAB insiders filed 3 sales worth $235K on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own ZLAB?
13 13F filers hold ZLAB among their 50 largest positions, worth $498.4M combined, including Peter Kolchinsky. The biggest bets by portfolio weight are B Group, Inc. (4.9%), ADAR1 Capital Management, LLC (3.0%) and TCG Crossover Management, LLC (2.8%). In their latest 13Fs, 2 managers opened a new position and 2 added to one.
Has Congress traded ZLAB?
No member of Congress has disclosed a trade in ZLAB.
Who is the largest holder of ZLAB?
Among 13F filers, Rtw Investments, LP reports the largest ZLAB position, $124.9M (6,574,032 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is B Group, Inc.'s: 4.9% of its portfolio.
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