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ASPN · Aspen Aerogels Inc

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$5.13 +0.08 (+1.58%) At close · Jul 17
Market Cap
$425.16M
Shares
82,877,453

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 168
Total Value: $237,524,463
Total Shares: 69,356,943
Showing 1–100 of 175 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 168 13F filers
Top Holder
17.7%
Jun 2023 → Mar 2026 · range 8.3% – 22.9%
of institutional value
Top 5
43.5%
Jun 2023 → Mar 2026 · range 33.4% – 43.5%
of institutional value
Top 10
59.7%
Jun 2023 → Mar 2026 · range 48.7% – 61.3%
of institutional value
HHI
586
Jun 2023 → Mar 2026 · range 350 – 722
Broadly held
Showing 100 of 175
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Small KIM, LLC $41,999,056 17.68% 12,280,426
Small OAKTOP CAPITAL MANAGEMENT II, L.P. $17,676,865 7.44% 5,168,674
Mega BlackRock, Inc. $16,221,316 6.83% 4,743,076
Mid NEEDHAM INVESTMENT MANAGEMENT LLC $15,454,210 6.51% 4,518,775
Mega VANGUARD CAPITAL MANAGEMENT LLC $11,751,653 4.95% 3,436,156
Small George Kaiser Family Foundation Endowment $10,832,241 4.56% 3,167,322
Mega STATE STREET CORP $7,936,886 3.34% 2,320,727
Mega Invesco Ltd. $7,859,784 3.31% 2,298,183
Small GAGNON SECURITIES LLC Broker-Dealer $6,367,530 2.68% 1,861,851
Mid RICE HALL JAMES & ASSOCIATES, LLC $5,309,987 2.24% 1,552,628
Mega GEODE CAPITAL MANAGEMENT, LLC $5,269,436 2.22% 1,540,771
Mega AMERIPRISE FINANCIAL INC $5,151,816 2.17% 1,506,379
Mega MILLENNIUM MANAGEMENT LLC $4,803,988 2.02% 1,404,675
Large MARSHALL WACE, LLP $4,319,807 1.82% 1,263,102
Mega DIMENSIONAL FUND ADVISORS LP $4,297,161 1.81% 1,256,480
Mega AMERICAN CENTURY COMPANIES INC $4,267,417 1.80% 1,247,783
Large JACOBS LEVY EQUITY MANAGEMENT, INC $4,168,224 1.75% 1,218,779
Mid Telemark Asset Management, LLC $3,420,000 1.44% 1,000,000
Mid ROYCE & ASSOCIATES LP $3,373,874 1.42% 986,513
Mega JPMORGAN CHASE & CO $3,301,981 1.39% 965,492
Mega GOLDMAN SACHS GROUP INC $3,076,334 1.30% 899,513
Large HRT FINANCIAL LP $2,976,887 1.25% 870,435
Mega D. E. Shaw & Co., Inc. $2,850,816 1.20% 833,572
Mega BNP PARIBAS ARBITRAGE, SA $2,386,927 1.00% 697,932
Small Samjo Management, LLC $2,208,037 0.93% 645,625
Mega CITADEL ADVISORS LLC $1,987,659 0.84% 581,187
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $1,903,999 0.80% 556,725
Mega AQR CAPITAL MANAGEMENT LLC $1,799,325 0.76% 526,119
Mega NORTHERN TRUST CORP Bank $1,790,102 0.75% 523,422
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,554,054 0.65% 454,402
Large FEDERATED HERMES, INC. $1,539,122 0.65% 450,036
Small Palogic Value Management, L.P. $1,539,000 0.65% 450,000
Mega TWO SIGMA INVESTMENTS, LP $1,509,711 0.64% 441,436
Mega DEUTSCHE BANK AG\ Bank $1,229,608 0.52% 359,535
Mid ALGERT GLOBAL LLC $1,116,322 0.47% 326,410
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $938,164 0.39% 274,317
Large Point72 Asset Management, L.P. $877,619 0.37% 256,614
Mega BANK OF AMERICA CORP /DE/ Bank $824,287 0.35% 241,020
Mega CITIGROUP INC $799,133 0.34% 233,665
Mid XTX Topco Ltd $688,675 0.29% 201,367
Mega UBS Group AG $647,162 0.27% 189,229
Mega MORGAN STANLEY $644,004 0.27% 188,306
Mega JANE STREET GROUP, LLC $642,479 0.27% 187,860
Mega Bank of New York Mellon Corp Bank $635,000 0.27% 185,673
Mega FIRST TRUST ADVISORS LP $619,820 0.26% 181,234
Small IRONWOOD INVESTMENT MANAGEMENT LLC $569,929 0.24% 166,646
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $538,308 0.23% 157,400
Large TUDOR INVESTMENT CORP ET AL $516,738 0.22% 151,093
Small Inspire Investing, LLC $516,433 0.22% 151,004
Mega CITADEL ADVISORS LLC $511,290 0.22% 149,500
Large Balyasny Asset Management L.P. $510,855 0.22% 149,373
Mid Engineers Gate Manager LP $506,703 0.21% 148,159
Small EntryPoint Capital, LLC $501,621 0.21% 146,673
Large Man Group plc $490,161 0.21% 143,322
Large LAZARD ASSET MANAGEMENT LLC $484,767 0.20% 141,745
Mega Nuveen, LLC $460,561 0.19% 134,667
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $445,284 0.19% 130,200
Mega Mitsubishi UFJ Asset Management Co., Ltd. $435,981 0.18% 127,480
Micro Firsthand Capital Management, Inc. $427,500 0.18% 125,000
Large ALPS ADVISORS INC $425,287 0.18% 124,353
Small Dynamic Technology Lab Private Ltd $416,193 0.18% 121,694
Small Sargent Investment Group, LLC $398,282 0.17% 116,457
Mega JANE STREET GROUP, LLC $392,616 0.17% 114,800
Large Russell Investments Group, Ltd. $391,198 0.16% 114,386
Mega PRICE T ROWE ASSOCIATES INC /MD/ $366,966 0.15% 107,300
Mega HSBC HOLDINGS PLC $359,038 0.15% 104,982
Large STATE OF WISCONSIN INVESTMENT BOARD $351,151 0.15% 102,676
Mid RBF Capital, LLC $342,000 0.14% 100,000
Large Walleye Capital LLC $332,424 0.14% 97,200
Small Numerai GP LLC $327,978 0.14% 95,900
Mega RHUMBLINE ADVISERS $287,276 0.12% 83,999
Mega CITADEL ADVISORS LLC $271,890 0.11% 79,500
Mid OPPENHEIMER & CO INC $260,891 0.11% 76,284
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $256,500 0.11% 75,000
Mid Y-Intercept (Hong Kong) Ltd $233,438 0.10% 36,820
Mega ALLIANCEBERNSTEIN L.P. $219,187 0.09% 64,090
Micro WJ Financial Advisors LLC $218,691 0.09% 63,945
Mega FRANKLIN RESOURCES INC $215,586 0.09% 63,037
Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Pension $214,434 0.09% 62,700
Mid Diversified Trust Co Bank $209,517 0.09% 33,047
Large Squarepoint Ops LLC $204,351 0.09% 59,752
Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $192,647 0.08% 30,386
Mid Graham Capital Management, L.P. $179,300 0.08% 52,427
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $158,004 0.07% 46,200
Large Walleye Trading LLC $153,558 0.06% 44,900
Small Odyssean, LLC $142,815 0.06% 41,759
Small nVerses Capital, LLC $138,667 0.06% 40,546
Mega LPL Financial LLC $132,863 0.06% 38,849
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $107,890 0.05% 31,547
Mid Concurrent Investment Advisors, LLC $102,771 0.04% 30,050
Mega WELLS FARGO & COMPANY/MN $97,752 0.04% 28,583
Mega Vanguard Global Advisers, LLC $97,747 0.04% 28,581
Large PANAGORA ASSET MANAGEMENT INC $95,428 0.04% 27,903
Small AXQ CAPITAL, LP $91,054 0.04% 26,624
Large CWM, LLC $84,220 0.04% 24,626
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $81,396 0.03% 23,800
Mid IMC-Chicago, LLC $76,847 0.03% 22,470
Mega JANE STREET GROUP, LLC $67,716 0.03% 19,800
Large OSAIC HOLDINGS, INC. $67,062 0.03% 19,609
Mid INTECH INVESTMENT MANAGEMENT LLC $63,543 0.03% 18,580
Key facts CIK 1145986 CUSIP 04523Y105 13F (30d) 11 filings 10 filers Visit website Investor relations

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