ASPN: Aspen Aerogels, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 1 sales totaling $58.09M in the last 180 days.
Insider sales
| Trade date | Insider | Role | Value | 10b5-1 plan |
|---|---|---|---|---|
| 2026-09-23 | Wood River Capital, Llc / Koch, Inc. | Other | $58.09M |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-10-19 | New 13G stake | Orin Hirschman | 8.60% | SEC | |
| 2026-09-24 | Fell below 5% | Wood River Capital, LLC | 0.00% | SEC |
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