ASPN · Insider trading · 13F holders · Congress trades
Aspen Aerogels Inc (ASPN)
Who is buying and selling ASPN: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 7
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $58.1M
- Congress trades, 12 months
- 1
ASPN at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 ASPN insider filed 1 sale worth $58.1M on SEC Form 4, and no open-market purchases.
- 7 13F filers hold ASPN among their 50 largest positions, worth $161.9M combined. The biggest bets by portfolio weight are Kim, LLC (22.2%), George Kaiser Family Foundation (1.9%) and Gagnon Securities LLC (1.9%). In their latest 13Fs, 1 manager opened a new position and 0 added to one.
- Members of Congress have disclosed 3 ASPN trades since 2016, 0 purchases and 1 sale in the past year; the latest was Debbie Wasserman Schultz (D-FL), selling $1K–15K on Nov 22, 2017.
- ASPN last closed at $5.39 on Oct 29, 2026.
ASPN insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 ASPN insider filed 1 sale worth $58.1M on SEC Form 4, and no open-market purchases.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Sep 24, 2026 | Wood River Capital, LLC | Former 10% Owner | Sale | 12,280,426 | $4.73 | $58.1M | SEC |
Who owns ASPN? Hedge funds and superinvestors
7 13F filers hold ASPN among their 50 largest positions, worth $161.9M combined. The biggest bets by portfolio weight are Kim, LLC (22.2%), George Kaiser Family Foundation (1.9%) and Gagnon Securities LLC (1.9%). In their latest 13Fs, 1 manager opened a new position and 0 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Kim, LLCInvestment manager | 22.2% | $77.9M | 12,280,426 | +0.0% shares | Q2 2026 |
| Oaktop Capital Management II, L.P.Hedge fund | 1.4% | $32.8M | 5,168,674 | +0.0% shares | Q2 2026 |
| Needham Investment Management LLCMutual fund manager | 0.6% | $20.7M | 3,260,800 | -27.8% shares | Q2 2026 |
| George Kaiser Family FoundationEndowment & foundation | 1.9% | $20.1M | 3,167,322 | +0.0% shares | Q2 2026 |
| Gagnon Securities LLCWealth manager | 1.9% | $9.7M | 1,535,812 | -17.5% shares | Q2 2026 |
| Firsthand Capital Management, Inc.Mutual fund manager | 1.3% | $793K | 125,000 | +0.0% shares | Q2 2026 |
| Performa Ltd (US), LLCInstitutional asset manager | 0.0% | $5K | 800 | New | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 7). Screen ASPN in the grand portfolio →
ASPN stock trades by members of Congress
Members of Congress have disclosed 3 ASPN trades since 2016, 0 purchases and 1 sale in the past year; the latest was Debbie Wasserman Schultz (D-FL), selling $1K–15K on Nov 22, 2017.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Nov 29, 2017 | Debbie Wasserman SchultzD-FL · House | Sale | $1K–15K | Nov 22, 2017 | +6.8% |
| Oct 18, 2016 | Debbie Wasserman SchultzD-FL · House | Buy | $1K–15K | Sep 19, 2016 | +3.1% |
| Jul 6, 2016 | Debbie Wasserman SchultzD-FL · House | Buy | $1K–15K | Apr 27, 2016 | +9.1% |
Analysis mentioning ASPN
Posts from the blog that cover Aspen Aerogels Inc, newest first.
ASPN questions and answers
Are insiders buying ASPN stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 ASPN insider filed 1 sale worth $58.1M on SEC Form 4, and no open-market purchases.
Which hedge funds own ASPN?
7 13F filers hold ASPN among their 50 largest positions, worth $161.9M combined. The biggest bets by portfolio weight are Kim, LLC (22.2%), George Kaiser Family Foundation (1.9%) and Gagnon Securities LLC (1.9%). In their latest 13Fs, 1 manager opened a new position and 0 added to one.
Has Congress traded ASPN?
Members of Congress have disclosed 3 ASPN trades since 2016, 0 purchases and 1 sale in the past year; the latest was Debbie Wasserman Schultz (D-FL), selling $1K–15K on Nov 22, 2017.
Who is the largest holder of ASPN?
Among 13F filers, Kim, LLC reports the largest ASPN position, $77.9M (12,280,426 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Kim, LLC's: 22.2% of its portfolio.
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