Form4insider filings, from the source

Company · CIK 0001145986 · SIC 5030 — Wholesale-Lumber & Other Construction Materials · NYSE

ASPEN AEROGELS INC · ASPN

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

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $58.1M · 1net −$58.1M
$10k$10k$1M$1M$100M$100MbuyssalesAug 28Sep 2Sep 7Sep 12Sep 18Sep 23Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 23, 2026 SForm 4 →Sep 24, 8:59 pm EDTWood River Capital, LLC +1Other12,280,426$4.73$58,086,4150−100%

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

No reported derivative activity in this period.