Company · CIK 0001581280 · SIC 2836 — Biological Products, (No Diagnostic Substances) · Nasdaq

Twist Bioscience Corp · TWST

Insider activity reported against this company. All insider holders · On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $0 · 0sales $58.1M · 9net −$58.1M

Reported at this company — common stock

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 24, 2026 SForm 4 →	Sep 25, 4:05 pm EDT	Emily M. LeproustChief Executive Officer, Director	5,203	$177.38	$922,907	613,699	−0.84%	10b5-1
Sep 21, 2026 SForm 4 →	Sep 23, 4:08 pm EDT	Dennis ChoSee Remarks	348	$165.49	$57,591	73,303	−0.47%
Sep 21, 2026 SForm 4 →	Sep 23, 4:07 pm EDT	Paula GreenSVP of Human Resources	294	$165.49	$48,654	116,720	−0.25%
Sep 21, 2026 SForm 4 →	Sep 23, 4:07 pm EDT	Emily M. LeproustChief Executive Officer, Director	1,687	$165.49	$279,183	618,902	−0.27%
Sep 17, 2026 SForm 4 →	Sep 21, 4:05 pm EDT	Emily M. LeproustChief Executive Officer, Director	356,546	$157.99	$56,330,724	620,589	−36.5%	10b5-1
Sep 17, 2026 MForm 4 →	Sep 21, 4:05 pm EDT	Emily M. LeproustChief Executive Officer, Director	208,708	$20.21	$4,218,324	977,135	—	10b5-1
Sep 8, 2026 SForm 4 →	Sep 10, 4:00 pm EDT	Dennis ChoSee Remarks	412	$122.62	$50,521	73,651	−0.56%
Sep 8, 2026 SForm 4 →	Sep 10, 4:00 pm EDT	Paula GreenSVP of Human Resources	907	$122.62	$111,220	117,014	−0.77%
Sep 8, 2026 SForm 4 →	Sep 10, 4:00 pm EDT	Emily M. LeproustChief Executive Officer, Director	2,302	$122.62	$282,280	768,427	−0.30%
Sep 8, 2026 SForm 4 →	Sep 10, 4:00 pm EDT	Robert F. WernerChief Accounting Officer	238	$122.62	$29,185	44,399	−0.53%

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 17, 2026 MForm 4 →	Sep 21, 4:05 pm EDT	Emily M. LeproustChief Executive Officer, Director	208,708	—	—	0	—	10b5-1