Company · CIK 0001566044 · SIC 2834 — Pharmaceutical Preparations · Nasdaq

Yarrow Bioscience, Inc. · YARW

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

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

Reported at this company — common stock

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Jul 29, 2026 JForm 4 →	Jul 30, 4:05 pm EDT	RTW Fund Group GP, LLC +110% Owner	133,290	—	—	266,307	—
Jul 23, 2026 FForm 4 →	Jul 24, 5:00 pm EDT	Tyler ZerondaCHIEF FINANCIAL OFFICER	22,516	$0.8976	$20,210	74,918	—
Jul 23, 2026 FForm 4 →	Jul 24, 5:00 pm EDT	Iain StuartCHIEF SCIENTIFIC OFFICER	15,405	$0.8976	$13,828	95,944	—
Jul 23, 2026 FForm 4 →	Jul 24, 5:00 pm EDT	Mutya HarschCHIEF LEGAL OFFICER AND GC	22,516	$0.8976	$20,210	95,918	—
Jul 23, 2026 FForm 4 →	Jul 24, 5:00 pm EDT	David DomzalskiPRESIDENT AND CEO, Director	79,391	$0.8976	$71,261	347,174	—
Jun 30, 2026 FForm 4 →	Jul 2, 8:05 pm EDT	Tyler ZerondaCHIEF FINANCIAL OFFICER	3,464	$0.6507	$2,254	97,434	—
Jun 30, 2026 FForm 4 →	Jul 2, 8:05 pm EDT	Iain StuartCHIEF SCIENTIFIC OFFICER	2,370	$0.6507	$1,542	111,349	—
Jun 30, 2026 FForm 4 →	Jul 2, 8:05 pm EDT	Mutya HarschCHIEF LEGAL OFFICER AND GC	3,464	$0.6507	$2,254	118,434	—
Jun 30, 2026 FForm 4 →	Jul 2, 8:05 pm EDT	David DomzalskiPRESIDENT AND CEO, Director	12,214	$0.6507	$7,948	426,565	—

Reported at this company — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Jul 29, 2026 JForm 4 →	Jul 30, 4:05 pm EDT	RTW Fund Group GP, LLC +110% Owner	133,290	—	—	8,949,719	—
Jul 27, 2026 AForm 4 →	Jul 29, 9:36 pm EDT	Mona AshiyaDirector	15,435	—	—	15,435	—
Jul 27, 2026 AForm 4 →	Jul 29, 9:33 pm EDT	Tyler ZerondaDirector	185,798	—	—	185,798	—