Aspen AerogelsASPN
13F holders, Q3 2025 (September 30)204holders +22
51new positions
27sold out
7famous investors
$6.96avg. 13F price*
At the end of Q3 2025, 204 institutions reported holding Aspen Aerogels Inc. (ASPN) in their 13F filings, up 22 from Q2 2025. 51 opened new positions and 27 sold out. The largest holders were Kim, LLC ($85.5M), BlackRock, Inc. ($34.6M) and Vanguard Group Inc. ($31.4M). 7 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Aspen Aerogels Inc.
- CUSIP
- 04523Y105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 51 | $20.9M |
| Exits | 27 | $12.3M |
All 13F filers, Q2 2025 → Q3 2025: 8,172,436 shares bought and 8,196,787 shares sold, net −24,351 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 204 holders
| Kim, LLC | 16.36% | No change | 12,280,426 | $85.5M |
| BlackRock, Inc. | 0.00% | Add +0.0% | 4,977,558 | $34.6M |
| Vanguard Group Inc. | 0.00% | Add +0.5% | 4,510,370 | $31.4M |
| Oaktop Capital Management Ii, L.P. | 2.77% | No change | 4,394,525 | $30.6M |
| Needham Investment Management LLC | 1.67% | Add +14.1% | 3,439,700 | $23.9M |
| George Kaiser Family Foundation | 3.09% | No change | 3,167,322 | $22.0M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -8.1% | 2,252,013 | $15.7M |
| State Street Corp. | 0.00% | Add +1.2% | 1,944,636 | $13.5M |
| Telemark Asset Management, LLC | 1.18% | No change | 1,792,424 | $12.5M |
| Gagnon Securities LLC | 2.45% | Reduce -7.6% | 1,754,833 | $12.2M |
| Geode Capital Management, LLC | 0.00% | Add +0.1% | 1,584,871 | $11.0M |
| AWM Investment Company, Inc. | 1.02% | Add +8.4% | 1,555,477 | $10.8M |
| Millennium Management | 0.01% | Add +59.6% | 1,447,517 | $10.1M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -35.5% | 1,419,804 | $9.9M |
| Rice Hall James & Associates, LLC | 0.53% | Reduce -8.8% | 1,407,726 | $9.8M |
| JPMorgan Chase & Co. | 0.00% | Add +8.3% | 1,349,749 | $9.4M |
| Invesco Ltd. | 0.00% | Add +46.9% | 1,222,376 | $8.5M |
| Citadel Advisors | 0.01% | Add +583.7% | 1,114,590 | $7.8M |
| Penn Capital Management Company, LLC | 0.56% | Add +39.0% | 1,036,995 | $7.2M |
| Bank of America Corp. | 0.00% | Reduce -0.4% | 814,849 | $5.7M |
| Two Sigma Investments, LP | 0.01% | Add +5.2% | 811,528 | $5.6M |
| New York State Common Retirement Fund | 0.01% | Add +45.6% | 720,024 | $5.0M |
| Morgan Stanley | 0.00% | Reduce -1.6% | 694,488 | $4.8M |
| BNP Paribas Financial Markets | 0.00% | Add +68.4% | 692,148 | $4.8M |
| Northern Trust Corp. | 0.00% | Add +1.6% | 613,598 | $4.3M |
| Peregrine Investment Management Inc. | 2.05% | New | 600,000 | $4.2M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +4.9% | 572,588 | $4.0M |
| Gagnon Advisors, LLC | 2.43% | No change | 565,570 | $3.9M |
| Jump Financial, LLC | 0.05% | Add +362.5% | 538,300 | $3.7M |
| First Eagle Investment Management, LLC | 0.01% | New | 517,323 | $3.6M |
| Tudor Investment Corporation | 0.02% | New | 486,596 | $3.4M |
| American Century Companies Inc. | 0.00% | Add +3032.9% | 471,312 | $3.3M |
| UBS Group AG | 0.00% | Add +45.4% | 396,809 | $2.8M |
| Essex Investment Management Co. LLC | 0.42% | Reduce -8.6% | 390,033 | $2.7M |
| Royal Bank of Canada | 0.00% | Add +2.3% | 387,034 | $2.7M |
| Baird Financial Group, Inc. | 0.00% | Reduce -8.8% | 364,423 | $2.5M |
| Samjo Management, LLC | 0.91% | Reduce -0.8% | 340,825 | $2.4M |
| Marshall Wace, LLP | 0.00% | Reduce -22.7% | 312,190 | $2.2M |
| Federated Hermes, Inc. | 0.00% | Reduce -83.6% | 289,931 | $2.0M |
| Trexquant Investment LP | 0.02% | Reduce -59.9% | 260,157 | $1.8M |
| State of Wisconsin Investment Board | 0.00% | Reduce -9.1% | 256,790 | $1.8M |
| Renaissance Technologies | 0.00% | Reduce -63.6% | 246,900 | $1.7M |
| Deutsche Bank AG | 0.00% | Add +2.4% | 220,213 | $1.5M |
| Bank of New York Mellon Corp | 0.00% | Add +6.9% | 214,948 | $1.5M |
| Citigroup Inc. | 0.00% | Reduce -30.5% | 210,545 | $1.5M |
| Palogic Value Management, L.P. | 0.60% | Reduce -67.2% | 200,000 | $1.4M |
| First Trust Advisors LP | 0.00% | Reduce -4.7% | 195,968 | $1.4M |
| Sargent Investment Group, LLC | 0.19% | Reduce -8.0% | 189,227 | $1.3M |
| Point72 Asset Management | 0.00% | New | 184,300 | $1.3M |
| AQR Capital Management | 0.00% | Reduce -6.3% | 177,805 | $1.2M |
| Cubist Systematic Strategies, LLC | 0.02% | Add +83.8% | 176,010 | $1.2M |
| Susquehanna International Group, LLP | 0.00% | Reduce -39.5% | 168,847 | $1.2M |
| HRT Financial LP | 0.00% | Reduce -71.9% | 167,423 | $1.2M |
| CastleKnight Management LP | 0.06% | Reduce -54.3% | 162,599 | $1.1M |
| Jane Street Group, LLC | 0.00% | Add +89.8% | 161,125 | $1.1M |
| Quantbot Technologies LP | 0.03% | New | 158,583 | $1.1M |
| Los Angeles Capital Management LLC | 0.00% | New | 139,213 | $969K |
| Voleon Capital Management LP | 0.02% | Reduce -44.3% | 138,538 | $964K |
| Swiss National Bank | 0.00% | No change | 135,200 | $941K |
| Ironwood Investment Management LLC | 0.41% | Add +8.1% | 134,362 | $935K |
| Russell Investments Group, Ltd. | 0.00% | Add +74.5% | 134,247 | $934K |
| Nuveen, LLC | 0.00% | No change | 133,867 | $932K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -50.6% | 126,275 | $879K |
| Firsthand Capital Management, Inc. | 1.46% | No change | 125,000 | $870K |
| Alps Advisors Inc. | 0.00% | Reduce -11.1% | 123,677 | $861K |
| Oppenheimer & Co. Inc. | 0.01% | Add +515.9% | 121,826 | $848K |
| ExodusPoint Capital Management, LP | 0.01% | New | 116,422 | $810K |
| LPL Financial LLC | 0.00% | Add +153.2% | 110,857 | $772K |
| Rhumbline Advisers | 0.00% | Reduce -2.4% | 110,732 | $771K |
| Graham Capital Management, L.P. | 0.04% | Add +738.8% | 105,880 | $737K |
| Two Sigma Advisers, LP | 0.00% | Add +161.9% | 104,500 | $727K |
| IMC-Chicago, LLC | 0.01% | Add +18.4% | 103,197 | $718K |
| Barclays PLC | 0.00% | Reduce -23.5% | 99,365 | $692K |
| Algert Global LLC | 0.01% | Reduce -50.3% | 94,655 | $659K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -48.4% | 94,589 | $658K |
| Legato Capital Management LLC | 0.07% | Add +0.2% | 93,806 | $653K |
| Squarepoint Ops LLC | 0.00% | Add +33.3% | 90,850 | $632K |
| Atom Investors LP | 0.04% | New | 82,648 | $575K |
| SG Americas Securities, LLC | 0.00% | Reduce -39.9% | 80,423 | $560K |
| Man Group plc | 0.00% | New | 80,197 | $558K |
| T. Rowe Price Associates Inc. | 0.00% | Add +8.1% | 76,626 | $534K |
| Counterpoint Mutual Funds LLC | 0.04% | New | 71,595 | $498K |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.00% | Reduce -11.4% | 70,177 | $488K |
| Harbour Capital Advisors, LLC | 0.10% | New | 58,675 | $473K |
| Legal & General Group Plc | 0.00% | No change | 67,130 | $467K |
| Inspire Investing, LLC | 0.04% | New | 66,115 | $460K |
| Verition Fund Management LLC | 0.00% | Reduce -30.7% | 65,962 | $459K |
| EntryPoint Capital, LLC | 0.18% | Reduce -38.4% | 65,173 | $454K |
| Alliancebernstein L.P. | 0.00% | Reduce -26.4% | 64,090 | $446K |
| California State Teachers Retirement System | 0.00% | Add +7.3% | 60,670 | $422K |
| ARS Investment Partners, LLC | 0.03% | Add +6.2% | 60,007 | $418K |
| Brevan Howard Capital Management LP | 0.01% | New | 55,400 | $386K |
| Wells Fargo & Company | 0.00% | Add +4.7% | 53,769 | $374K |
| Wolverine Trading, LLC | 0.01% | New | 49,356 | $349K |
| Capital Fund Management S.A. | 0.00% | Reduce -29.0% | 49,750 | $346K |
| Perigon Wealth Management, LLC | 0.01% | Add +30.3% | 49,321 | $343K |
| Franklin Resources Inc. | 0.00% | Add +15.7% | 46,754 | $325K |
| Intech Investment Management LLC | 0.00% | Add +16.1% | 44,964 | $313K |
| Connors Investor Services Inc. | 0.02% | Add +14.2% | 40,167 | $280K |
| Sanders Morris Harris LLC | 0.04% | No change | 40,000 | $278K |
"% of holder's portfolio" is ASPN's weight in each manager's 13F, not the share of Aspen Aerogels Inc. the manager owns.