Aspen Aerogels Inc
ASPN- Exchange
- NYSE
- Industry
- Wholesale-Lumber & Other Construction Materials
- SEC CIK
- 0001145986
In the last 90 days, Aspen Aerogels Inc insiders filed 0 open-market purchases and 1 sale; 179 institutions reported holding it in 13F filings for Q2 2026, worth $464.9M in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Aspen Aerogels Inc as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 204
- +23 vs. Q2 2025
- Shares held
- 71.4M
- −59.8K (−0.1%) vs. Q2 2025
- Total value
- $496.8M
- +$73.5M (+17.4%) vs. Q2 2025
- New holders
- 51
- 63 more added
- Sold out
- 28
- 55 more reduced
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ASPN on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 179 | $464.9M |
| Q1 2026 | 166 | $236.7M |
| Q4 2025 | 183 | $199.0M |
| Q3 2025 | 204 | $496.8M |
| Q2 2025 | 182 | $423.4M |
| Q1 2025 | 221 | $455.4M |
| Q4 2024 | 231 | $868.2M |
| Q3 2024 | 243 | $1.93B |
| Q2 2024 | 222 | $1.69B |
| Q1 2024 | 167 | $1.31B |
| Q4 2023 | 170 | $1.18B |
| Q3 2023 | 159 | $582.9M |
| Q2 2023 | 159 | $524.6M |
| Q1 2023 | 156 | $498.6M |
| Q4 2022 | 164 | $793.4M |
| Q3 2022 | 140 | $344.0M |
| Q2 2022 | 148 | $366.3M |
| Q1 2022 | 145 | $1.09B |
| Q4 2021 | 159 | $1.42B |
| Q3 2021 | 130 | $1.27B |
| Q2 2021 | 115 | $849.9M |
| Q1 2021 | 85 | $482.2M |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Aspen Aerogels Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Oaktop Capital Management II, L.P. | 4,394,525 | $30.6M | 2.77% | 00.0% | Unchanged |
| Vanguard Group Inc | 4,510,370 | $31.4M | 0.00% | +22,686+0.5% | Added |
| BlackRock, Inc. | 4,977,558 | $34.6M | 0.00% | +3720.0% | Added |
| Kim, LLC | 12,280,426 | $85.5M | 9.62% | 00.0% | Unchanged |
| Royce & Associates LP | 0 | $0 | 0.00% | −531,068−100.0% | Sold out |
| Frontier Capital Management Co LLC | 0 | $0 | 0.00% | −508,651−100.0% | Sold out |
| Principal Financial Group Inc | 0 | $0 | 0.00% | −166,868−100.0% | Sold out |
| Hartree Partners, LP | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −141,785−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −81,684−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −78,851−100.0% | Sold out |
| Envestnet Asset Management Inc | 0 | $0 | 0.00% | −66,910−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −59,099−100.0% | Sold out |
| Thrivent Financial for Lutherans | 0 | $0 | 0.00% | −55,719−100.0% | Sold out |
| Skylands Capital, LLC | 0 | $0 | 0.00% | −54,800−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −35,414−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −33,353−100.0% | Sold out |
| FORA Capital, LLC | 0 | $0 | 0.00% | −29,452−100.0% | Sold out |
| Corton Capital Inc. | 0 | $0 | 0.00% | −20,612−100.0% | Sold out |
| Allspring Global Investments Holdings, LLC | 0 | $0 | 0.00% | −17,807−100.0% | Sold out |
| Concurrent Investment Advisors, LLC | 0 | $0 | 0.00% | −17,604−100.0% | Sold out |
| MML Investors Services, LLC | 0 | $0 | 0.00% | −15,794−100.0% | Sold out |
| Guggenheim Capital LLC | 0 | $0 | 0.00% | −10,750−100.0% | Sold out |
| Integrated Wealth Concepts LLC | 0 | $0 | 0.00% | −10,614−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −10,571−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −10,396−100.0% | Sold out |
| Bryn Mawr Trust Co | 0 | $0 | 0.00% | −4,500−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −872−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −604−100.0% | Sold out |
| Performa Ltd (US), LLC | 0 | $0 | 0.00% | −250−100.0% | Sold out |
| Cullen/Frost Bankers, Inc. | 0 | $0 | 0.00% | −103−100.0% | Sold out |
| WealthTrak Capital Management LLC | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Avantax Advisory Services, Inc. | – | – | – | – | Not filed |