Form4insider filings, from the source

Company · CIK 0001790169 · SIC 5122 — Wholesale-Drugs, Proprietaries & Druggists' Sundries · Nasdaq

ZeroStack Corp. · ZSTK

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

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $3.5M · 1sales $7,570 · 1net $3.5M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesJul 19Jul 24Jul 29Aug 4Aug 9Aug 14Aug 20

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 19, 2026 SForm 4 →Aug 21, 7:51 pm EDTRudy RongPresident1,000$7.57$7,5700−100%
Jul 20, 2026 PForm 4 →Jul 20, 6:31 pm EDTMichael HeinrichExecutive Chairman, Director4,608,575$0.7549$3,479,0134,608,575—
Jul 20, 2026 XForm 4 →Jul 20, 6:26 pm EDTDaniel Reis-FariaCEO, Director5,954,743$0.0001$5955,954,743—

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

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jul 20, 2026 AForm 4 →Jul 20, 6:31 pm EDTMichael HeinrichExecutive Chairman, Director500,000——500,000—
Jul 20, 2026 AXForm 4 →Jul 20, 6:26 pm EDTDaniel Reis-FariaCEO, Director6,454,743$25.19$149,999,3810—
Jul 20, 2026 AForm 4 →Jul 20, 6:21 pm EDTDany VaimanCFO250,000——250,000—