ASPN Institutional Ownership & Shareholders
ASPEN AEROGELS INC (ASPN) is currently held by 179 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $504.16M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Kim, Llc is currently the largest disclosed institutional shareholder of ASPN tracked by InsiderSet, reporting ownership valued at approximately $77.86M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $62.02M, representing an estimated loss of -20.35% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 52% of the total disclosed ASPN value among the investors covered in this analysis. Major shareholders include Kim, Llc, Blackrock, Inc., Oaktop Capital Management Ii, L.P., and several other long-term asset managers with concentrated positions in ASPEN AEROGELS INC (ASPN).
This page ranks the largest institutional ASPN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
179
Total Reported Value
$504.16M
Largest Holder
Kim, Llc
Largest Position
$77.86M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
72
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Kim, Llc | 10.59% | 12,280,426 | $77,857,901 | $62,016,151 | -$15,841,750 | -20.35% | |
| Blackrock, Inc. | 0.00% | 5,277,148 | $33,457,120 | $26,649,597 | -$6,807,523 | -20.35% | |
| Oaktop Capital Management Ii, L.P. | 1.39% | 5,168,674 | $32,769,393 | $26,101,804 | -$6,667,589 | -20.35% | |
| Vanguard Capital Management Llc | 0.00% | 3,539,271 | $22,438,978 | $17,873,319 | -$4,565,659 | -20.35% | |
| Needham Investment Management Llc | 0.62% | 3,260,800 | $20,673,472 | $16,467,040 | -$4,206,432 | -20.35% | |
| George Kaiser Family Foundation | 1.93% | 3,167,322 | $20,080,821 | $15,994,976 | -$4,085,845 | -20.35% | |
| State Street Corp | 0.00% | 2,559,495 | $16,227,198 | $12,925,450 | -$3,301,748 | -20.35% | |
| American Century Companies Inc | 0.01% | 2,510,042 | $15,913,666 | $12,675,712 | -$3,237,954 | -20.35% | |
| Jacobs Levy Equity Management, Inc | 0.05% | 2,058,083 | $13,048,246 | $10,393,319 | -$2,654,927 | -20.35% | |
| Ameriprise Financial Inc | 0.00% | 1,821,295 | $11,547,010 | $9,197,540 | -$2,349,470 | -20.35% | |
| Geode Capital Management, Llc | 0.00% | 1,770,425 | $11,227,752 | $8,940,646 | -$2,287,106 | -20.37% | |
| Rice Hall James & Associates, Llc | 0.50% | 1,635,259 | $10,367,542 | $8,258,058 | -$2,109,484 | -20.35% | |
| Invesco Ltd. | 0.00% | 1,619,972 | $10,270,622 | $8,180,859 | -$2,089,763 | -20.35% | |
| Gagnon Securities Llc | 1.88% | 1,535,812 | $9,737,048 | $7,755,851 | -$1,981,197 | -20.35% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,447,333 | $9,174,123 | $7,309,032 | -$1,865,091 | -20.33% | |
| Goldman Sachs Group Inc | 0.00% | 1,372,300 | $8,700,382 | $6,930,115 | -$1,770,267 | -20.35% | |
| Royce & Associates Lp | 0.07% | 1,323,218 | $8,389,202 | $6,682,251 | -$1,706,951 | -20.35% | |
| Aqr Capital Management Llc | 0.00% | 1,276,346 | $8,092,034 | $6,445,547 | -$1,646,487 | -20.35% | |
| Millennium Management Llc | 0.01% | 1,190,616 | $7,548,505 | $6,012,611 | -$1,535,894 | -20.35% | |
| Marshall Wace, Llp | 0.01% | 1,146,707 | $7,270,122 | $5,790,870 | -$1,479,252 | -20.35% | |
| D. E. Shaw & Co., Inc. | 0.00% | 1,066,501 | $6,761,616 | $5,385,830 | -$1,375,786 | -20.35% | |
| Telemark Asset Management, Llc | 0.46% | 1,000,000 | $6,340,000 | $5,050,000 | -$1,290,000 | -20.35% | |
| Jpmorgan Chase & Co | 0.00% | 1,004,383 | $6,006,210 | $5,072,134 | -$934,076 | -15.55% | |
| Bnp Paribas Financial Markets | 0.00% | 867,199 | $5,498,042 | $4,379,355 | -$1,118,687 | -20.35% | |
| Two Sigma Investments, Lp | 0.00% | 779,468 | $4,941,827 | $3,936,313 | -$1,005,514 | -20.35% | |
| Vanguard Portfolio Management Llc | 0.00% | 698,983 | $4,431,552 | $3,529,864 | -$901,688 | -20.35% | |
| Acadian Asset Management Llc | 0.01% | 684,915 | $4,337,000 | $3,458,821 | -$878,179 | -20.25% | |
| Federated Hermes, Inc. | 0.01% | 596,883 | $3,784,238 | $3,014,259 | -$769,979 | -20.35% | |
| Charles Schwab Investment Management Inc | 0.00% | 570,712 | $3,618,314 | $2,882,096 | -$736,218 | -20.35% | |
| Tudor Investment Corp Et Al | 0.01% | 567,384 | $3,597,215 | $2,865,289 | -$731,926 | -20.35% | |
| Northern Trust Corp | 0.00% | 565,569 | $3,585,707 | $2,856,123 | -$729,584 | -20.35% | |
| Vanguard Fiduciary Trust Co | 0.00% | 474,393 | $3,007,652 | $2,395,685 | -$611,967 | -20.35% | |
| Panagora Asset Management Inc | 0.01% | 442,448 | $2,805,120 | $2,234,362 | -$570,758 | -20.35% | |
| Morgan Stanley | 0.00% | 397,075 | $2,517,456 | $2,005,229 | -$512,227 | -20.35% | |
| Deutsche Bank Ag\ | 0.00% | 372,077 | $2,358,969 | $1,878,989 | -$479,980 | -20.35% | |
| Baird Financial Group, Inc. | 0.00% | 345,193 | $2,188,524 | $1,743,225 | -$445,299 | -20.35% | |
| Algert Global Llc | 0.02% | 302,582 | $1,918,370 | $1,528,039 | -$390,331 | -20.35% | |
| Trexquant Investment Lp | 0.01% | 302,439 | $1,917,463 | $1,527,317 | -$390,146 | -20.35% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 274,392 | $1,739,645 | $1,385,680 | -$353,965 | -20.35% |
| Bank Of America Corp | 0.00% | 252,746 | $1,602,409 | $1,276,367 | -$326,042 | -20.35% | |
| Citadel Advisors Llc | 0.00% | 238,731 | $1,513,555 | $1,205,592 | -$307,963 | -20.35% | |
| Y-Intercept (Hong Kong) Ltd | 0.03% | 275,553 | $1,510,030 | $1,391,543 | -$118,487 | -7.85% | |
| Prudential Financial Inc | 0.00% | 229,935 | $1,457,788 | $1,161,172 | -$296,616 | -20.35% | |
| Xtx Topco Ltd | 0.02% | 227,977 | $1,445,374 | $1,151,284 | -$294,090 | -20.35% | |
| First Trust Advisors Lp | 0.00% | 222,352 | $1,409,711 | $1,122,878 | -$286,833 | -20.35% | |
| Bank Of New York Mellon Corp | 0.00% | 195,389 | $1,238,767 | $986,714 | -$252,053 | -20.35% | |
| Palogic Value Management, L.P. | 0.42% | 185,589 | $1,176,634 | $937,224 | -$239,410 | -20.35% | |
| Citigroup Inc | 0.00% | 181,651 | $1,151,667 | $917,338 | -$234,329 | -20.35% | |
| Ironwood Investment Management Llc | 0.39% | 179,301 | $1,136,768 | $905,470 | -$231,298 | -20.35% | |
| Susquehanna International Group, Llp | 0.00% | 177,419 | $1,124,836 | $895,966 | -$228,870 | -20.35% |
Frequently asked questions about ASPN
Who are the largest institutional holders of ASPN?
The largest institutional holders of ASPN reported in the latest SEC Form 13F filings include Kim, Llc, Blackrock, Inc., Oaktop Capital Management Ii, L.P., Vanguard Capital Management Llc, and Needham Investment Management Llc. InsiderSet ranks institutional holders by their latest reported ASPN position.
What is ASPN institutional ownership?
This page tracks ASPN positions reported by institutional investment managers through SEC Form 13F. ASPEN AEROGELS INC (ASPN) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ASPN?
InsiderSet currently tracks 179 institutional managers reporting ASPN holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ASPN shareholders.
How much ASPN stock do institutions own?
Institutional investment managers disclosed approximately $504.16M in ASPN holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ASPN institutional ownership last updated?
The latest ASPN institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ASPN holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ASPN position after the reporting date.
Are institutions buying or selling ASPN?
Institutional buying and selling can be analyzed by comparing ASPN positions across consecutive 13F reporting periods. InsiderSet's ASPN Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ASPN ownership changes.
How has ASPN institutional ownership changed over time?
InsiderSet tracks ASPN institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.