Form4insider filings, from the source

Company · CIK 0001921865 · SIC 2890 — Miscellaneous Chemical Products · Nasdaq

ASP Isotopes Inc. · ASPI

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

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $1.2M · 4net −$1.2M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesAug 28Sep 2Sep 7Sep 12Sep 18Sep 23Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 8, 2026 SForm 4 →Sep 10, 9:45 pm EDTRobert AinscowCOO8,438$4.29$36,2162,248,441−0.37%10b5-1
Sep 2, 2026 SForm 4 →Sep 4, 9:33 pm EDTDonald George AinscowEVP, Gen Counsel, Secretary23,678$3.89$92,107776,322−2.96%
Sep 2, 2026 SForm 4 →Sep 4, 9:32 pm EDTRobert AinscowCOO25,000$3.91$97,6252,256,879−1.10%10b5-1
Sep 2, 2026 SForm 4 →Sep 4, 9:30 pm EDTPaul Elliot MannChairman and CEO, Director251,275$3.98$999,2379,328,570−2.62%10b5-1

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

No reported derivative activity in this period.