ASPEN AEROGELS INC (ASPN) Institutional Shareholders
ASPEN AEROGELS INC (ASPN) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $464.33M in ASPN holdings during the latest filing period.
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 $62.26M, representing an estimated loss of -20.03% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 57% 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
175
Total Reported Value
$464.33M
Largest Holder
Kim, Llc
Largest Position
$77.86M
Insider Transactions (90d)
1
Latest Filing Quarter
Q2 2026
New Institutional Positions
88
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 | $62,261,760 | -$15,596,141 | -20.03% | |
| Blackrock, Inc. | 0.00% | 5,277,148 | $33,457,120 | $26,755,140 | -$6,701,980 | -20.03% | |
| Oaktop Capital Management Ii, L.P. | 1.39% | 5,168,674 | $32,769,393 | $26,205,177 | -$6,564,216 | -20.03% | |
| Vanguard Capital Management Llc | 0.00% | 3,539,271 | $22,438,978 | $17,944,104 | -$4,494,874 | -20.03% | |
| Needham Investment Management Llc | 0.62% | 3,260,800 | $20,673,472 | $16,532,256 | -$4,141,216 | -20.03% | |
| George Kaiser Family Foundation | 1.93% | 3,167,322 | $20,080,821 | $16,058,323 | -$4,022,498 | -20.03% | |
| State Street Corp | 0.00% | 2,559,495 | $16,227,198 | $12,976,640 | -$3,250,558 | -20.03% | |
| American Century Companies Inc | 0.01% | 2,510,042 | $15,913,666 | $12,725,913 | -$3,187,753 | -20.03% | |
| Jacobs Levy Equity Management, Inc | 0.05% | 2,058,083 | $13,048,246 | $10,434,481 | -$2,613,765 | -20.03% | |
| Ameriprise Financial Inc | 0.00% | 1,821,295 | $11,547,010 | $9,233,966 | -$2,313,044 | -20.03% | |
| Geode Capital Management, Llc | 0.00% | 1,770,425 | $11,227,752 | $8,976,055 | -$2,251,697 | -20.05% | |
| Rice Hall James & Associates, Llc | 0.50% | 1,635,259 | $10,367,542 | $8,290,763 | -$2,076,779 | -20.03% | |
| Invesco Ltd. | 0.00% | 1,619,972 | $10,270,622 | $8,213,258 | -$2,057,364 | -20.03% | |
| Gagnon Securities Llc | 1.88% | 1,535,812 | $9,737,048 | $7,786,567 | -$1,950,481 | -20.03% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,447,333 | $9,174,123 | $7,337,978 | -$1,836,145 | -20.01% | |
| Goldman Sachs Group Inc | 0.00% | 1,372,300 | $8,700,382 | $6,957,561 | -$1,742,821 | -20.03% | |
| Royce & Associates Lp | 0.07% | 1,323,218 | $8,389,202 | $6,708,715 | -$1,680,487 | -20.03% | |
| Aqr Capital Management Llc | 0.00% | 1,276,346 | $8,092,034 | $6,471,074 | -$1,620,960 | -20.03% | |
| Millennium Management Llc | 0.01% | 1,190,616 | $7,548,505 | $6,036,423 | -$1,512,082 | -20.03% | |
| Marshall Wace, Llp | 0.01% | 1,146,707 | $7,270,122 | $5,813,804 | -$1,456,318 | -20.03% | |
| D. E. Shaw & Co., Inc. | 0.00% | 1,066,501 | $6,761,616 | $5,407,160 | -$1,354,456 | -20.03% | |
| Telemark Asset Management, Llc | 0.46% | 1,000,000 | $6,340,000 | $5,070,000 | -$1,270,000 | -20.03% | |
| Jpmorgan Chase & Co | 0.00% | 1,004,383 | $6,006,210 | $5,092,222 | -$913,988 | -15.22% | |
| Bnp Paribas Financial Markets | 0.00% | 867,199 | $5,498,042 | $4,396,699 | -$1,101,343 | -20.03% | |
| Two Sigma Investments, Lp | 0.00% | 779,468 | $4,941,827 | $3,951,903 | -$989,924 | -20.03% | |
| Vanguard Portfolio Management Llc | 0.00% | 698,983 | $4,431,552 | $3,543,844 | -$887,708 | -20.03% | |
| Acadian Asset Management Llc | 0.01% | 684,915 | $4,337,000 | $3,472,519 | -$864,481 | -19.93% | |
| Federated Hermes, Inc. | 0.01% | 596,883 | $3,784,238 | $3,026,197 | -$758,041 | -20.03% | |
| Charles Schwab Investment Management Inc | 0.00% | 570,712 | $3,618,314 | $2,893,510 | -$724,804 | -20.03% | |
| Tudor Investment Corp Et Al | 0.01% | 567,384 | $3,597,215 | $2,876,637 | -$720,578 | -20.03% | |
| Northern Trust Corp | 0.00% | 565,569 | $3,585,707 | $2,867,435 | -$718,272 | -20.03% | |
| Vanguard Fiduciary Trust Co | 0.00% | 474,393 | $3,007,652 | $2,405,173 | -$602,479 | -20.03% | |
| Panagora Asset Management Inc | 0.01% | 442,448 | $2,805,120 | $2,243,211 | -$561,909 | -20.03% | |
| Morgan Stanley | 0.00% | 397,075 | $2,517,456 | $2,013,170 | -$504,286 | -20.03% | |
| Deutsche Bank Ag\ | 0.00% | 372,077 | $2,358,969 | $1,886,430 | -$472,539 | -20.03% | |
| Baird Financial Group, Inc. | 0.00% | 345,193 | $2,188,524 | $1,750,129 | -$438,395 | -20.03% | |
| Algert Global Llc | 0.02% | 302,582 | $1,918,370 | $1,534,091 | -$384,279 | -20.03% | |
| Trexquant Investment Lp | 0.01% | 302,439 | $1,917,463 | $1,533,366 | -$384,097 | -20.03% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 274,392 | $1,739,645 | $1,391,167 | -$348,478 | -20.03% |
| Bank Of America Corp | 0.00% | 252,746 | $1,602,409 | $1,281,422 | -$320,987 | -20.03% | |
| Citadel Advisors Llc | 0.00% | 238,731 | $1,513,555 | $1,210,366 | -$303,189 | -20.03% | |
| Prudential Financial Inc | 0.00% | 229,935 | $1,457,788 | $1,165,770 | -$292,018 | -20.03% | |
| Xtx Topco Ltd | 0.02% | 227,977 | $1,445,374 | $1,155,843 | -$289,531 | -20.03% | |
| First Trust Advisors Lp | 0.00% | 222,352 | $1,409,711 | $1,127,325 | -$282,386 | -20.03% | |
| Bank Of New York Mellon Corp | 0.00% | 195,389 | $1,238,767 | $990,622 | -$248,145 | -20.03% | |
| Palogic Value Management, L.P. | 0.42% | 185,589 | $1,176,634 | $940,936 | -$235,698 | -20.03% | |
| Citigroup Inc | 0.00% | 181,651 | $1,151,667 | $920,971 | -$230,696 | -20.03% | |
| Ironwood Investment Management Llc | 0.39% | 179,301 | $1,136,768 | $909,056 | -$227,712 | -20.03% | |
| Susquehanna International Group, Llp | 0.00% | 177,419 | $1,124,836 | $899,514 | -$225,322 | -20.03% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 171,150 | $1,085,091 | $867,731 | -$217,361 | -20.03% |
Frequently asked questions about ASPN
Who owns the most ASPN stock?
The largest holders of ASPN are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ASPEN AEROGELS INC (ASPN).
Is ASPN widely held by superinvestors?
Many widely followed stocks like ASPN appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ASPN is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.