Aspen AerogelsASPN
13F holders, Q4 2025 (December 31)183holders −21
36new positions
58sold out
5famous investors
$2.84avg. 13F price*
At the end of Q4 2025, 183 institutions reported holding Aspen Aerogels Inc. (ASPN) in their 13F filings, down 21 from Q3 2025. 36 opened new positions and 58 sold out. The largest holders were Kim, LLC ($34.8M), BlackRock, Inc. ($13.9M) and Vanguard Group Inc. ($13.3M). 5 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio).
- Company
- Aspen Aerogels Inc.
- CUSIP
- 04523Y105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 36 | $7.6M |
| Exits | 58 | $33.4M |
All 13F filers, Q3 2025 → Q4 2025: 10,936,314 shares bought and 12,390,769 shares sold, net −1,454,455 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 183 holders
| Kim, LLC | 9.04% | No change | 12,280,426 | $34.8M |
| BlackRock, Inc. | 0.00% | Reduce -1.0% | 4,929,239 | $13.9M |
| Vanguard Group Inc. | 0.00% | Add +3.9% | 4,685,950 | $13.3M |
| Oaktop Capital Management Ii, L.P. | 1.05% | No change | 4,394,525 | $12.4M |
| Needham Investment Management LLC | 0.78% | Add +26.5% | 4,351,700 | $12.3M |
| Invesco Ltd. | 0.00% | Add +237.9% | 4,129,934 | $11.7M |
| George Kaiser Family Foundation | 1.20% | No change | 3,167,322 | $9.0M |
| State Street Corp. | 0.00% | Add +28.6% | 2,501,469 | $7.1M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -11.0% | 2,003,963 | $5.7M |
| Geode Capital Management, LLC | 0.00% | Add +1.1% | 1,602,049 | $4.5M |
| JPMorgan Chase & Co. | 0.00% | Add +9.9% | 1,483,745 | $4.2M |
| Rice Hall James & Associates, LLC | 0.22% | Add +1.0% | 1,421,605 | $4.0M |
| Ameriprise Financial Inc. | 0.00% | New | 1,378,284 | $3.9M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -8.8% | 1,294,928 | $3.7M |
| American Century Companies Inc. | 0.00% | Add +145.7% | 1,157,978 | $3.3M |
| Gagnon Securities LLC | 0.66% | Reduce -35.4% | 1,133,248 | $3.2M |
| Telemark Asset Management, LLC | 0.28% | Reduce -44.2% | 1,000,000 | $2.8M |
| Millennium Management | 0.00% | Reduce -39.8% | 870,951 | $2.5M |
| Citadel Advisors | 0.00% | Reduce -22.3% | 866,218 | $2.5M |
| Samjo Management, LLC | 0.87% | Add +134.3% | 798,525 | $2.3M |
| Two Sigma Investments, LP | 0.00% | Reduce -6.7% | 757,419 | $2.1M |
| Bank of America Corp. | 0.00% | Reduce -7.7% | 752,430 | $2.1M |
| BNP Paribas Financial Markets | 0.00% | Reduce -0.1% | 691,270 | $2.0M |
| First Eagle Investment Management, LLC | 0.00% | Add +20.3% | 622,487 | $1.8M |
| Federated Hermes, Inc. | 0.00% | Add +94.7% | 564,486 | $1.6M |
| Marshall Wace, LLP | 0.00% | Add +77.5% | 554,180 | $1.6M |
| Jump Financial, LLC | 0.02% | Add +2.4% | 551,071 | $1.6M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -5.6% | 540,323 | $1.5M |
| Northern Trust Corp. | 0.00% | Reduce -12.1% | 539,168 | $1.5M |
| Palogic Value Management, L.P. | 0.64% | Add +162.5% | 525,000 | $1.5M |
| FirstWave Capital Management LLC | 0.63% | — | 372,001 | $1.1M |
| AQR Capital Management | 0.00% | Add +108.1% | 369,949 | $1.0M |
| Morgan Stanley | 0.00% | Reduce -49.9% | 347,648 | $984K |
| Los Angeles Capital Management LLC | 0.00% | Reduce -14.8% | 118,664 | $894K |
| UBS Group AG | 0.00% | Reduce -20.5% | 315,348 | $892K |
| Jane Street Group, LLC | 0.00% | Add +81.9% | 293,150 | $830K |
| SG Americas Securities, LLC | 0.00% | Add +227.5% | 263,354 | $745K |
| Numerai GP LLC | 0.09% | Add +1277.9% | 251,888 | $713K |
| Citigroup Inc. | 0.00% | Add +13.3% | 238,631 | $675K |
| Deutsche Bank AG | 0.00% | Add +1.3% | 223,093 | $631K |
| XTX Topco Ltd | 0.01% | Add +786.1% | 202,030 | $572K |
| Bank of New York Mellon Corp | 0.00% | Reduce -8.4% | 196,903 | $557K |
| First Trust Advisors LP | 0.00% | Add +0.3% | 196,566 | $556K |
| Susquehanna International Group, LLP | 0.00% | Add +13.2% | 191,204 | $541K |
| Inspire Investing, LLC | 0.04% | Add +152.4% | 166,874 | $472K |
| Graham Capital Management, L.P. | 0.02% | Add +50.0% | 158,839 | $450K |
| Healthcare of Ontario Pension Plan Trust Fund | 0.00% | New | 157,400 | $445K |
| Sargent Investment Group, LLC | 0.05% | Reduce -25.2% | 141,607 | $401K |
| Jacobs Levy Equity Management, Inc. | 0.00% | New | 140,113 | $397K |
| Swiss National Bank | 0.00% | No change | 135,200 | $383K |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.00% | Add +87.3% | 131,468 | $380K |
| Nuveen, LLC | 0.00% | No change | 133,867 | $379K |
| Ironwood Investment Management LLC | 0.15% | Reduce -5.1% | 127,460 | $361K |
| Firsthand Capital Management, Inc. | 0.66% | No change | 125,000 | $354K |
| State of Wisconsin Investment Board | 0.00% | Reduce -53.2% | 120,238 | $340K |
| Engineers Gate Manager LP | 0.00% | New | 119,227 | $337K |
| Alps Advisors Inc. | 0.00% | Reduce -5.9% | 116,372 | $329K |
| EntryPoint Capital, LLC | 0.12% | Add +69.0% | 110,142 | $312K |
| Barclays PLC | 0.00% | Add +10.2% | 109,528 | $310K |
| Two Sigma Advisers, LP | 0.00% | Reduce -0.2% | 104,300 | $295K |
| Dynamic Technology Lab Private Ltd | 0.07% | New | 103,281 | $292K |
| IMC-Chicago, LLC | 0.01% | Reduce -0.3% | 102,930 | $291K |
| RBF Capital, LLC | 0.01% | New | 100,000 | $283K |
| T. Rowe Price Associates Inc. | 0.00% | Add +28.3% | 98,299 | $279K |
| Assenagon Asset Management S.A. | 0.00% | New | 97,002 | $275K |
| Verition Fund Management LLC | 0.00% | Add +47.0% | 96,973 | $274K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -28.8% | 95,651 | $271K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | No change | 94,589 | $268K |
| Rhumbline Advisers | 0.00% | Reduce -19.3% | 89,318 | $253K |
| Jain Global LLC | 0.00% | New | 87,835 | $249K |
| Wells Fargo & Company | 0.00% | Add +52.8% | 82,170 | $233K |
| Tudor Investment Corporation | 0.00% | Reduce -83.7% | 79,171 | $224K |
| California State Teachers Retirement System | 0.00% | Add +29.3% | 78,454 | $222K |
| Oppenheimer & Co. Inc. | 0.00% | Reduce -36.8% | 77,021 | $218K |
| Legal & General Group Plc | 0.00% | No change | 67,130 | $190K |
| ExodusPoint Capital Management, LP | 0.00% | Reduce -43.8% | 65,470 | $185K |
| WJ Financial Advisors LLC | 0.16% | New | 64,815 | $183K |
| Alliancebernstein L.P. | 0.00% | No change | 64,090 | $181K |
| Aristides Capital LLC | 0.06% | New | 62,400 | $177K |
| Algert Global LLC | 0.00% | Reduce -41.0% | 55,835 | $158K |
| Connors Investor Services Inc. | 0.01% | Add +37.3% | 55,167 | $156K |
| LPL Financial LLC | 0.00% | Reduce -50.3% | 55,076 | $156K |
| Acadian Asset Management LLC | 0.00% | New | 43,842 | $122K |
| Odyssean, LLC | 0.08% | — | 41,759 | $118K |
| AWM Investment Company, Inc. | 0.01% | Reduce -97.4% | 41,092 | $116K |
| ARS Investment Partners, LLC | 0.01% | Reduce -32.1% | 40,765 | $115K |
| Caption Management, LLC | 0.00% | Add +20.3% | 36,100 | $102K |
| Quadrature Capital Ltd | 0.00% | Add +248.5% | 35,583 | $101K |
| PharVision Advisers, LLC | 0.05% | New | 33,808 | $96K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -1.2% | 30,799 | $87K |
| Janus Henderson Group PLC | 0.00% | No change | 30,455 | $86K |
| Lighthouse Investment Partners, LLC | 0.00% | New | 30,000 | $85K |
| Concurrent Investment Advisors, LLC | 0.00% | New | 30,000 | $85K |
| MetLife Investment Management, LLC | 0.00% | Reduce -10.8% | 27,154 | $77K |
| Intech Investment Management LLC | 0.00% | Reduce -43.5% | 25,382 | $72K |
| Journey Strategic Wealth LLC | 0.00% | New | 25,157 | $71K |
| Oxford Asset Management LLP | 0.02% | New | 24,083 | $68K |
| HSBC Holdings PLC | 0.00% | New | 23,326 | $66K |
| D. E. Shaw & Co. | 0.00% | Add +75.6% | 23,217 | $66K |
| Centiva Capital, LP | 0.00% | New | 21,247 | $60K |
"% of holder's portfolio" is ASPN's weight in each manager's 13F, not the share of Aspen Aerogels Inc. the manager owns.