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Aspen Aerogels Inc

ASPN
Exchange
NYSE
Industry
Wholesale-Lumber & Other Construction Materials
SEC CIK
0001145986

In the last 90 days, Aspen Aerogels Inc insiders filed 0 open-market purchases and 1 sale; 179 institutions reported holding it in 13F filings for Q2 2026, worth $466.0M in total; no superinvestor holds it.

Key figures

Insider buysOpen market, last 90 days
0
Insider sellsLast 90 days, $58.1M in total
1
13F holdersQ2 2026, +15 vs. previous quarter
179
13F valueReported value at the end of Q2 2026
$466.0M
Superinvestors holdingAt the end of Q2 2026
0

Price chart

Superinvestors holding ASPN, Q2 2026

Go to the superinvestors tab

No superinvestor reported holding ASPN at the end of Q2 2026.

Latest insider trades

Open-market purchases and sales by Aspen Aerogels Inc insiders from Form 4, newest first.

See all insider trades
Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 24, 2026 (view filing)8:59 PM ETSep 231 dayWood River Capital, LLC and 1 otherOther: Former 10% OwnerSSale−12.3M$4.73−$58.1M−100.0%0 after
Nov 14, 2025 (view filing)Nov 131 dayYoung Donald RPresident and CEOSSale−56.8K$3.23−$183.6K−10.3%494.0K after10b5-1
Aug 13, 2025 (view filing)Aug 12-131 dayDaniel Santhosh PChief Accounting OfficerSSale−6.41K$7.38−$47.3K−26.4%17.9K after2 lots
May 12, 2025 (view filing)May 12Same dayYoung Donald RPresident and CEOPPurchase+20.0K$5.35+$107.0K+3.8%550.9K after
Oct 1, 2024 (view filing)Sep 301 dayYoung Donald RPresident and CEOSSale−63.4K$30.03−$1.90M−11.6%483.6K after10b5-1
Aug 28, 2024 (view filing)Aug 262 daysRodriguez Ricardo C.CFO & TreasurerSSale−32.5K$30.14−$978.4K−61.0%20.8K after4 lots10b5-1
Aug 19, 2024 (view filing)5:34 PM ETAug 19Same dayWood River Capital, LLC and 1 other10% OwnerSSale−4.14M$4,491,358,877.56−$18,594T–0 afterDerivativePrice outlier
May 29, 2024 (view filing)May 28-291 dayYoung Donald RPresident and CEOSSale−433.7K$29.29−$12.7M−41.0%622.9K after3 lots10b5-1
May 23, 2024 (view filing)May 221 dayKool KathleenDirectorSSale−4.47K$27.30−$122.0K−27.7%11.7K after
May 15, 2024 (view filing)6:00 PM ETMay 141 dayKoch Industries Inc and 1 other10% OwnerSSale−3.50M$23.50−$82.3M−22.2%12.3M after

Top 10 13F holders, Q2 2026

The largest institutional positions in Aspen Aerogels Inc at the end of Q2 2026; share changes are against Q1 2026.

See all 179 holders
Institutions holding ASPN in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Kim, LLC12,280,426$77.9M10.59%00.0%Unchanged
BlackRock, Inc.5,277,148$33.5M0.00%+534,072+11.3%Added
Oaktop Capital Management II, L.P.5,168,674$32.8M1.39%00.0%Unchanged
Vanguard Capital Management LLC3,539,271$22.4M0.00%+103,115+3.0%Added
Needham Investment Management LLC3,260,800$20.7M0.62%−1,257,975−27.8%Reduced
George Kaiser Family Foundation3,167,322$20.1M1.93%00.0%Unchanged
State Street Corp2,559,495$16.2M0.00%+238,768+10.3%Added
American Century Companies Inc2,510,042$15.9M0.01%+1,262,259+101.2%Added
Jacobs Levy Equity Management, Inc2,058,083$13.0M0.05%+839,304+68.9%Added
Ameriprise Financial Inc1,821,295$11.5M0.00%+314,916+20.9%Added