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, Q1 2026
Institutional positions in Aspen Aerogels Inc as of Mar 31, 2026. 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
- 166
- −15 vs. Q4 2025
- Shares held
- 69.3M
- +3.89M (+5.9%) vs. Q4 2025
- Total value
- $236.7M
- +$51.0M (+27.5%) vs. Q4 2025
- New holders
- 34
- 44 more added
- Sold out
- 49
- 57 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Aspen Aerogels Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −14,093−100.0% | Sold out |
| KLP Kapitalforvaltning AS | 0 | $0 | 0.00% | −13,800−100.0% | Sold out |
| ProShare Advisors LLC | 0 | $0 | 0.00% | −12,118−100.0% | Sold out |
| Jefferson Bridge Capital, LLC | 0 | $0 | 0.00% | −11,450−100.0% | Sold out |
| Baird Financial Group, Inc. | 0 | $0 | 0.00% | −11,344−100.0% | Sold out |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0 | $0 | 0.00% | −10,703−100.0% | Sold out |
| Drive Wealth Management, LLC | 0 | $0 | 0.00% | −10,655−100.0% | Sold out |
| Balance Wealth, LLC | 0 | $0 | 0.00% | −10,297−100.0% | Sold out |
| Public Employees Retirement Association of Colorado | 0 | $0 | 0.00% | −6,088−100.0% | Sold out |
| Performa Ltd (US), LLC | 0 | $0 | 0.00% | −3,250−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −2,670−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −2,083−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −834−100.0% | Sold out |
| Bessemer Group Inc | 0 | $0 | 0.00% | −730−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −234−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |