ASPEN AEROGELS INC (ASPN)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
178
Reporting holders
$470.0M
Reported value
88.2%
Of shares outstanding
1.4%
Held as options
+15
Holder change
Institutions report 73,171,932 shares against 82,988,784 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| KIM, LLC | $77.9M | 12,280,426 | 7.76% | 17q | HELD |
| BlackRock, Inc. | $33.5M | 5,277,148 | 0.00% | 8q | +11.3%+$3.4M |
| OAKTOP CAPITAL MANAGEMENT II, L.P. | $32.8M | 5,168,674 | 1.39% | 31q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $22.4M | 3,539,271 | 0.00% | 2q | +3.0%+$653.7K |
| NEEDHAM INVESTMENT MANAGEMENT LLC | $20.7M | 3,260,800 | 0.62% | 31q | -27.8%-$8.0M |
| George Kaiser Family Foundation | $20.1M | 3,167,322 | 1.93% | 31q | HELD |
| STATE STREET CORP | $16.2M | 2,559,495 | 0.00% | 25q | +10.3%+$1.5M |
| AMERICAN CENTURY COMPANIES INC | $15.9M | 2,510,042 | 0.01% | 5q | +101.2%+$8.0M |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $13.0M | 2,058,083 | 0.05% | 3q | +68.9%+$5.3M |
| AMERIPRISE FINANCIAL INC | $11.5M | 1,821,295 | 0.00% | 3q | -39.5%-$7.6M |
| GEODE CAPITAL MANAGEMENT, LLC | $11.2M | 1,770,425 | 0.00% | 31q | +14.9%+$1.5M |
| RICE HALL JAMES & ASSOCIATES, LLC | $10.4M | 1,635,259 | 0.50% | 13q | +5.3%+$523.9K |
| Invesco Ltd. | $10.3M | 1,619,972 | 0.00% | 11q | -29.5%-$4.3M |
| GAGNON SECURITIES LLC | $9.7M | 1,535,812 | 1.88% | 5q | -17.5%-$2.1M |
| DIMENSIONAL FUND ADVISORS LP | $9.2M | 1,447,333 | 0.00% | 31q | +15.2%+$1.2M |
| GOLDMAN SACHS GROUP INC | $8.7M | 1,372,300 | 0.00% | 23q | +52.6%+$3.0M |
| ROYCE & ASSOCIATES LP | $8.4M | 1,323,218 | 0.07% | 2q | +34.1%+$2.1M |
| AQR CAPITAL MANAGEMENT LLC | $8.1M | 1,276,346 | 0.00% | 6q | +142.6%+$4.8M |
| MILLENNIUM MANAGEMENT LLC | $7.5M | 1,190,616 | 0.00% | 9q | -15.2%-$1.4M |
| MARSHALL WACE, LLP | $7.3M | 1,146,707 | 0.01% | 9q | -9.2%-$737.9K |
| D. E. Shaw & Co., Inc. | $6.8M | 1,066,501 | 0.00% | 6q | +27.9%+$1.5M |
| Telemark Asset Management, LLC | $6.3M | 1,000,000 | 0.46% | 31q | HELD |
| JPMORGAN CHASE & CO | $6.0M | 1,004,383 | 0.00% | 25q | +4.0%+$232.6K |
| BNP PARIBAS FINANCIAL MARKETS | $5.5M | 867,199 | 0.00% | 25q | +24.3%+$1.1M |
| TWO SIGMA INVESTMENTS, LP | $4.9M | 779,468 | 0.00% | 9q | +76.6%+$2.1M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $4.4M | 698,983 | 0.00% | 2q | -2.5%-$112.5K |
| FEDERATED HERMES, INC. | $3.8M | 596,883 | 0.01% | 5q | +32.6%+$931.0K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $3.6M | 570,712 | 0.00% | 25q | +2.5%+$88.7K |
| Sixth Street Partners Management Company, L.P. | $3.6M | 570,712 | 0.00% | new | NEW |
| TUDOR INVESTMENT CORP ET AL | $3.6M | 567,384 | 0.01% | 4q | +275.5%+$2.6M |
| NORTHERN TRUST CORP | $3.6M | 565,569 | 0.00% | 31q | +8.1%+$267.2K |
| CITADEL ADVISORS LLC | $3.1M | 238,731 | 0.00% | 23q | -58.9%-$4.4M |
| VANGUARD FIDUCIARY TRUST CO | $3.0M | 474,393 | 0.00% | 2q | +4.4%+$126.7K |
| PANAGORA ASSET MANAGEMENT INC | $2.8M | 442,448 | 0.01% | 2q | +1485.7%+$2.6M |
| MORGAN STANLEY | $2.5M | 397,075 | 0.00% | 35q | +110.9%+$1.3M |
| DEUTSCHE BANK AG\ | $2.4M | 372,077 | 0.00% | 25q | +3.5%+$79.5K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $2.3M | 177,419 | 0.00% | 23q | -35.3%-$1.3M |
| Baird Financial Group, Inc. | $2.2M | 345,193 | 0.00% | new | NEW |
| ALGERT GLOBAL LLC | $1.9M | 302,582 | 0.02% | 16q | -53.7%-$2.2M |
| Trexquant Investment LP | $1.9M | 302,439 | 0.01% | new | NEW |
| RENAISSANCE TECHNOLOGIES LLC | $1.7M | 274,392 | 0.00% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $1.6M | 252,746 | 0.00% | 26q | +4.9%+$74.3K |
| IMC-Chicago, LLC | $1.6M | options only | 0.00% | 10q | OPTIONS |
| PRUDENTIAL FINANCIAL INC | $1.5M | 229,935 | 0.00% | 2q | +2164.3%+$1.4M |
| XTX Topco Ltd | $1.4M | 227,977 | 0.02% | 4q | +13.2%+$168.7K |
| FIRST TRUST ADVISORS LP | $1.4M | 222,352 | 0.00% | 10q | +22.7%+$260.7K |
| JANE STREET GROUP, LLC | $1.3M | options only | 0.00% | 11q | OPTIONS |
| Bank of New York Mellon Corp | $1.2M | 195,389 | 0.00% | 31q | +5.2%+$61.6K |
| Palogic Value Management, L.P. | $1.2M | 185,589 | 0.39% | 7q | -58.8%-$1.7M |
| CITIGROUP INC | $1.2M | 181,651 | 0.00% | 27q | -22.3%-$329.8K |
| IRONWOOD INVESTMENT MANAGEMENT LLC | $1.1M | 179,301 | 0.39% | 5q | +7.6%+$80.2K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $1.1M | 171,150 | 0.00% | new | NEW |
| Jump Financial, LLC | $1.1M | 168,865 | 0.01% | new | NEW |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $997.9K | 157,400 | 0.00% | 3q | HELD |
| Nuveen, LLC | $921.4K | 145,324 | 0.00% | 6q | +7.9%+$67.6K |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | $812.2K | 128,107 | 0.00% | 2q | +104.3%+$414.7K |
| Jefferies Financial Group Inc. | $800.8K | 126,303 | 0.01% | new | NEW |
| Firsthand Capital Management, Inc. | $792.5K | 125,000 | 1.27% | 31q | HELD |
| Russell Investments Group, Ltd. | $762.7K | 120,306 | 0.00% | 15q | +5.2%+$37.5K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $697.4K | 110,000 | 0.01% | 2q | +46.7%+$221.9K |
| GROUP ONE TRADING LLC | $687.3K | options only | 0.00% | 22q | OPTIONS |
| Mitsubishi UFJ Asset Management Co., Ltd. | $681.6K | 107,505 | 0.00% | 21q | -15.7%-$126.6K |
| Sargent Investment Group, LLC | $674.8K | 106,432 | 0.08% | 21q | -8.6%-$63.6K |
| Inspire Investing, LLC | $674.1K | 106,330 | 0.03% | 4q | -29.6%-$283.2K |
| IEQ CAPITAL, LLC | $655.0K | 103,313 | 0.00% | new | NEW |
| RBF Capital, LLC | $634.0K | 100,000 | 0.03% | 3q | HELD |
| Man Group plc | $572.2K | 90,259 | 0.00% | 2q | -37.0%-$336.4K |
| RHUMBLINE ADVISERS | $528.3K | 83,335 | 0.00% | 25q | -0.8%-$4.2K |
| MERCER GLOBAL ADVISORS INC /ADV | $490.4K | 77,358 | 0.00% | new | NEW |
| LPL Financial LLC | $439.8K | 69,365 | 0.00% | 9q | +78.6%+$193.5K |
| FMR LLC | $434.1K | 68,476 | 0.00% | 22q | +1428.8%+$405.7K |
| EntryPoint Capital, LLC | $429.8K | 67,794 | 0.10% | 8q | -53.8%-$500.1K |
| UBS Group AG | $422.7K | 66,671 | 0.00% | 26q | -64.8%-$777.0K |
| OPPENHEIMER & CO INC | $408.5K | 64,430 | 0.00% | 10q | -15.5%-$75.2K |
| WINTON GROUP Ltd | $388.0K | 61,200 | 0.01% | new | NEW |
| WELLS FARGO & COMPANY/MN | $376.4K | 59,370 | 0.00% | 27q | +3.9%+$14.0K |
| SIMPLEX TRADING, LLC | $363.0K | 15,952 | 0.00% | 23q | +571.9%+$309.0K |
| Centiva Capital, LP | $357.9K | 56,459 | 0.00% | new | NEW |
| FRANKLIN RESOURCES INC | $303.7K | 47,907 | 0.00% | 2q | -24.0%-$95.9K |
| Graham Capital Management, L.P. | $293.3K | 46,267 | 0.01% | 10q | -11.7%-$39.1K |
| Arax Advisory Partners | $292.6K | 46,153 | 0.00% | new | NEW |
| Quantbot Technologies LP | $288.0K | 45,432 | 0.01% | 4q | +904.5%+$259.4K |
| Balyasny Asset Management L.P. | $277.2K | 43,717 | 0.00% | 2q | -70.7%-$669.9K |
| Mariner, LLC | $270.4K | 42,652 | 0.00% | new | NEW |
| Odyssean, LLC | $264.8K | 41,759 | 0.04% | 3q | HELD |
| MetLife Investment Management, LLC | $255.3K | 40,269 | 0.00% | 24q | +166.4%+$159.5K |
| ALLIANCEBERNSTEIN L.P. | $253.5K | 74,130 | 0.00% | 20q | +15.7%+$34.3K |
| State of Wyoming | $240.9K | 38,000 | 0.02% | new | NEW |
| FOX RUN MANAGEMENT, L.L.C. | $240.4K | 37,919 | 0.04% | new | NEW |
| Y-Intercept (Hong Kong) Ltd | $233.4K | 36,820 | 0.00% | new | NEW |
| Dynamic Technology Lab Private Ltd | $223.0K | 35,103 | 0.05% | 3q | -71.2%-$550.1K |
| STATE OF WISCONSIN INVESTMENT BOARD | $210.8K | 33,247 | 0.00% | 20q | -67.6%-$440.2K |
| DIVERSIFIED TRUST CO | $209.5K | 33,047 | 0.00% | new | NEW |
| Concurrent Investment Advisors, LLC | $203.2K | 32,050 | 0.00% | 3q | +6.7%+$12.7K |
| Creative Planning | $199.3K | 31,432 | 0.00% | new | NEW |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $198.3K | 31,271 | 0.00% | 9q | -0.9%-$1.7K |
| BAILARD, INC. | $187.1K | 29,508 | 0.00% | new | NEW |
| Vanguard Global Advisers, LLC | $181.2K | 28,581 | 0.00% | 2q | HELD |
| Cerity Partners LLC | $179.8K | 28,365 | 0.00% | 2q | +179.4%+$115.5K |
| Headlands Technologies LLC | $173.8K | 27,413 | 0.02% | new | NEW |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-13 | 13G/A | Needham Investment Management L.L.C.with 2 co-filers | 3.9% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 178 | $470.0M | 73,171,932 | 37 | 58 | 46 | 1.4% |
| Q1 2026 | 163 | $242.1M | 70,176,314 | 28 | 41 | 57 | 1.4% |
| Q4 2025 | 175 | $205.2M | 69,838,695 | 36 | 40 | 60 | 3.5% |
| Q3 2025 | 192 | $521.0M | 72,939,781 | 48 | 56 | 52 | 2.7% |
| Q2 2025 | 172 | $427.4M | 71,166,033 | 22 | 67 | 49 | 1.6% |
| Q1 2025 | 209 | $471.6M | 71,283,776 | 35 | 77 | 63 | 3.6% |
| Q4 2024 | 221 | $933.8M | 73,186,923 | 51 | 92 | 39 | 7.4% |
| Q3 2024 | 222 | $2.0B | 68,004,112 | 55 | 71 | 58 | 5.9% |
| Q2 2024 | 206 | $1.8B | 69,105,059 | 67 | 51 | 60 | 8.3% |
| Q1 2024 | 157 | $1.4B | 76,408,385 | 25 | 41 | 48 | 6.1% |
| Q4 2023 | 162 | $1.3B | 75,744,013 | 29 | 48 | 45 | 5.9% |
| Q3 2023 | 152 | $641.7M | 67,942,272 | 21 | 43 | 52 | 9.6% |
| Q2 2023 | 148 | $539.1M | 66,238,241 | 24 | 63 | 34 | 4.0% |
| Q1 2023 | 141 | $486.0M | 65,035,917 | 19 | 72 | 24 | 0.9% |
| Q4 2022 | 137 | $547.0M | 45,810,420 | 37 | 58 | 19 | 1.4% |
| Q3 2022 | 136 | $347.8M | 37,303,494 | 19 | 62 | 33 | 1.1% |
| Q2 2022 | 146 | $372.6M | 37,074,198 | 32 | 64 | 32 | 1.7% |
| Q1 2022 | 147 | $1.1B | 31,707,686 | 27 | 57 | 44 | 4.6% |
| Q4 2021 | 161 | $1.5B | 28,633,774 | 30 | 46 | 48 | 5.7% |
| Q3 2021 | 130 | $1.4B | 27,575,417 | 29 | 33 | 51 | 7.7% |
| Q2 2021 | 117 | $907.8M | 28,419,280 | 36 | 35 | 30 | 6.4% |
| Q1 2021 | 84 | $503.0M | 23,708,395 | 19 | 27 | 26 | 4.1% |
| Q4 2020 | 75 | $366.9M | 21,927,141 | 17 | 24 | 19 | 0.1% |
| Q3 2020 | 71 | $231.2M | 21,117,623 | 15 | 22 | 23 | 0.0% |
| Q2 2020 | 67 | $142.0M | 21,252,622 | 22 | 17 | 14 | 0.0% |
| Q1 2020 | 60 | $114.8M | 18,702,026 | 21 | 19 | 11 | 0.0% |
| Q4 2019 | 48 | $139.4M | 17,960,620 | 12 | 16 | 7 | 0.0% |
| Q3 2019 | 41 | $97.2M | 16,421,230 | 9 | 11 | 8 | 0.0% |
| Q2 2019 | 33 | $114.6M | 16,067,293 | 5 | 9 | 6 | 0.0% |
| Q1 2019 | 34 | $41.5M | 16,264,254 | 3 | 12 | 8 | 0.0% |
| Q4 2018 | 35 | $35.6M | 16,716,229 | 0 | 1 | 1 | 0.0% |