Koch Entities Exit Aspen Aerogels Entirely in $58.1M Block Trade
ASPN has more than doubled off its 52-week low of $2.3 on elevated volume (1.9× avg).
Summary
Koch entities sold their entire 12.28 million share position in Aspen Aerogels at $4.73 per share in a block trade, exiting the stock completely.
Key Events · Ownership and Investor Activity · ASPN
-
Koch Entities Exit Entire Position
Wood River Capital, LLC and Koch, Inc. sold all 12,280,426 shares of Aspen Aerogels common stock on September 23, 2026, ceasing to be beneficial owners of any shares.
-
Block Trade at $4.73 Per Share
The sale was executed as a block trade at $4.73 per share, generating approximately $58.1 million in proceeds (12,280,426 shares × $4.73).
-
Sale Below Current Market Price
The $4.73 per share sale price is below the current market price of $5.30 as of September 24, 2026, indicating the block trade was executed at a discount to clear the position.
-
Strategic Investor Exit
Koch entities had held the position since at least April 2022, with the prior Schedule 13D amendment filed August 19, 2024. This complete exit removes a major strategic investor from the shareholder base.
Analysis · ASPN · Trade & Services
A complete exit by a major strategic investor removes a significant overhang but also signals reduced institutional conviction. Koch's Wood River Capital and Koch, Inc. sold their entire 12,280,426-share stake in Aspen Aerogels at $4.73 per share on September 23, 2026, generating approximately $58.1 million in proceeds. The sale price sits below the current market price of $5.30, suggesting the block trade was executed at a discount to clear the position. The stake had been held since at least April 2022.
How filings like this one have moved
In the 30 days to Sep 30, 2026, 34.9% of the 1009 measured filings Wiseek scored 8 moved their stock by 5% or more by the next session's close. The median move was -0.52%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, ASPN was trading at $5.30 on NYSE in the Trade & Services sector, with a market capitalization of approximately $439.8M. The 52-week trading range was $2.30 to $9.35. This filing was assessed with negative market sentiment and an importance score of 8 out of 10.