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Insider Trading Intelligence
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YC

Yajing Chen

ZLAB
CHIEF FINANCIAL OFFICER · ZAI LAB LTD · CIK 0001985694
FILING MIX · LIFETIME41%/59%
BUYS
29
SELLS
41
TOTAL VALUE
$1.17M
COMPANIES
1
ACTIVE SINCE
Aug 2023
HOLDINGS NOW
35,691
AVG SELL PX
$27.85
TRADE KIND
SHOWING 70 / 70
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
19 backtested trades · 8 horizons · 27 pending
Forward-return performance of every backtestable P/S trade by Yajing Chen, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d19+57.89%-1.27%+1.24%-2.51%-2.22%—
14d19+63.16%-2.03%+0.94%-2.97%-7.15%—
30d19+42.11%-0.09%+3.52%-3.61%-4.35%—
60d19+57.89%-3.56%+5.86%-8.88%-10.95%—
90d19(1 pending)+61.11%-6.31%+7.72%-14.04%-17.45%—
180d19(3 pending)+56.25%-4.41%+10.13%-14.54%-26.05%—
1y19(8 pending)+45.45%+28.40%+17.86%+17.71%-0.52%—
2y19(15 pending)+0.00%+16.24%+38.39%-22.15%-16.16%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
ZLAB · 35,691 shares · as of Jun 26, 2026
021,16642,33263,49784,663202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 29 buys / 41 sellsCOVERAGE · 12 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
2,264$17.46$39.5K35,691Jun 26, 2026Jun 29, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
6,250——0Jun 25, 2026Jun 29, 2026 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
6,250——37,955Jun 25, 2026Jun 29, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
853$20.45$17.4K31,705Apr 6, 2026Apr 8, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
5,199$20.39$106.0K32,558Apr 2, 2026Apr 3, 2026 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
2,500——37,757Apr 2, 2026Apr 3, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
2,500——2,500Apr 2, 2026Apr 3, 2026 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
1,500——21,499Apr 1, 2026Apr 3, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
13,758——27,516Apr 1, 2026Apr 3, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
1,500——1,500Apr 1, 2026Apr 3, 2026 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
13,758——35,257Apr 1, 2026Apr 3, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
1,703$18.63$31.7K19,999Mar 13, 2026Mar 16, 2026 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
4,258——21,702Mar 12, 2026Mar 16, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
4,258——12,777Mar 12, 2026Mar 16, 2026 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
83,160——83,160Mar 4, 2026Mar 16, 2026 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
27,027——27,027Mar 4, 2026Mar 16, 2026 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
11,924——11,924Mar 4, 2026Apr 3, 2026 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
240$26.83$6.4K17,444Nov 3, 2025Nov 4, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
500——0Oct 31, 2025Nov 4, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
500——17,684Oct 31, 2025Nov 4, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
456$34.25$15.6K17,184Oct 2, 2025Oct 3, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
920——17,640Oct 1, 2025Oct 3, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
920——920Oct 1, 2025Oct 3, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE10b5-1
10b5-1 plan
610$35.27$21.5K17,548Aug 15, 2025Aug 18, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE10b5-1
10b5-1 plan
828$35.53$29.4K16,720Aug 15, 2025Aug 18, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
1,250——2,500Aug 14, 2025Aug 18, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
1,250——18,158Aug 14, 2025Aug 18, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE10b5-1
10b5-1 plan
4,096$34.01$139.3K16,908Aug 8, 2025Aug 12, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
2,675$36.13$96.7K21,004Jun 26, 2025Jun 27, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
6,250——6,250Jun 25, 2025Jun 27, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
6,250——23,679Jun 25, 2025Jun 27, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE10b5-1
10b5-1 plan
9,618$30.00$288.5K17,429Jun 2, 2025Jun 4, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
924$33.11$30.6K27,047Apr 4, 2025Apr 7, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
2,500——27,971Apr 3, 2025Apr 7, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
2,500——5,000Apr 3, 2025Apr 7, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
5,280$35.89$189.5K25,471Apr 2, 2025Apr 3, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
1,500——3,000Apr 1, 2025Apr 3, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
13,757——30,751Apr 1, 2025Apr 3, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
13,757——41,274Apr 1, 2025Apr 3, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
1,500——16,994Apr 1, 2025Apr 3, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
52,418——52,418Mar 12, 2025Mar 14, 2025 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
17,035——17,035Mar 12, 2025Mar 14, 2025 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
167$30.66$5.1K15,494Nov 4, 2024Nov 5, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
500——500Nov 1, 2024Nov 5, 2024 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
500——15,661Nov 1, 2024Nov 5, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
301$25.40$7.6K15,161Oct 2, 2024Oct 3, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
920——1,840Oct 1, 2024Oct 3, 2024 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
920——15,462Oct 1, 2024Oct 3, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
422$16.06$6.8K14,542Aug 15, 2024Aug 16, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
1,250——3,750Aug 14, 2024Aug 16, 2024 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
1,250——14,964Aug 14, 2024Aug 16, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
2,154$17.90$38.6K13,714Jun 26, 2024Jun 27, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
6,250——12,500Jun 25, 2024Jun 27, 2024 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
6,250——15,868Jun 25, 2024Jun 27, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
845$15.67$13.2K9,618Apr 4, 2024Apr 5, 2024 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
2,500$15.90$39.8K10,463Apr 3, 2024Apr 5, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
2,500——7,500Apr 3, 2024Apr 5, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
519$16.15$8.4K7,963Apr 2, 2024Apr 3, 2024 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
84,663——84,663Apr 1, 2024Apr 3, 2024 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
1,500$16.72$25.1K8,482Apr 1, 2024Apr 3, 2024 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
55,031——55,031Apr 1, 2024Apr 3, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
1,500——4,500Apr 1, 2024Apr 3, 2024 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
165$25.23$4.2K6,982Nov 2, 2023Nov 3, 2023 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
500——7,147Nov 1, 2023Nov 3, 2023 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
500——1,000Nov 1, 2023Nov 3, 2023 ↗View →
ZLAB
ZAI LAB LTD
PURCHASE
Chief Financial Officer
920——6,954Sep 29, 2023Oct 3, 2023 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
307$24.31$7.5K6,647Sep 29, 2023Oct 3, 2023 ↗View →
ZLAB
ZAI LAB LTD
SALE
Chief Financial Officer
920——2,760Sep 29, 2023Oct 3, 2023 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
20,000——20,000Aug 14, 2023Aug 21, 2023 ↗View →
ZLAB
ZAI LAB LTD
PURCHASEGRANT
Stock grant
5,000——5,000Aug 14, 2023Aug 21, 2023 ↗View →
Other insiders · ZLAB
Loading peer insiders…
About this filer
CIK 0001985694
ROLE
Chief Financial Officer
PRIMARY
ZLAB
COMPANIES
1
ACTIVE SINCE
Aug 2023
MARKETPEEL · /INSIDER/0001985694DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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