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Aspen Aerogels ASPN · USD

Energy · US listing · 🇺🇸 United States

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6.11

+24.44%

Close of 9 Nov 2026, in USD

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Reference data, closing prices and charts across 45,000 companies, plus crypto, commodities and currencies.

Largest shareholders

As filed, so dates differ, and a group and its funds can both appear.

HolderSharesStakeChangeFiled
Koch Industries LLC12.3m14.92%—31 Dec 2025
The Vanguard Group, Inc.4.7m5.68%+175.6k31 Dec 2025
Twin Oaks Partners4.4m5.34%—31 Dec 2025
BlackRock Institutional Trust Company, N.A.4.4m5.30%+11.4k31 Dec 2025
Needham Investment Management L.L.C.4.4m5.29%+912k31 Dec 2025
Invesco Capital Management LLC4.1m4.98%+2.9m31 Dec 2025
George Kaiser Family Foundation3.2m3.85%—31 Dec 2025
State Street Investment Management (US)2.5m3.04%+556.8k31 Dec 2025
Dimensional Fund Advisors, L.P.2m2.43%−248.1k31 Dec 2025
Geode Capital Management, L.L.C.1.6m1.95%+17.2k31 Dec 2025
J.P. Morgan Securities LLC1.5m1.77%+136k31 Dec 2025
Rice Hall James & Associates, LLC1.4m1.73%+13.9k31 Dec 2025
Columbia Threadneedle Investments (US)1.4m1.67%+1.4m31 Dec 2025
American Century Investment Management, Inc.1.2m1.41%+686.7k31 Dec 2025
Gagnon Securities LLC1.1m1.38%−621.6k31 Dec 2025

Short interest

Shares sold short, 15 Oct 2026. US exchange data.

6.1m

+0.7% on the period before. 7.6 days to cover.

Short volume

Share of the day's trading sold short, 4 Nov 2026

59.7%

Last 60 trading days.

Failed deliveries

Shares not delivered on settlement, from the SEC

  • 30 Sept 20261,329 shares
  • 25 Sept 202611,465,554 shares
  • 21 Sept 20261,365 shares
  • 18 Sept 2026874 shares
  • 14 Sept 2026962 shares

Sources and methodology

Data on this tab
Our data supplier
Chart on the Overview
TradingView

Nothing here is investment advice. Prices can be delayed or wrong, so check with the exchange before relying on them. Data for this page. How we cover markets.