Insider Transaction of William P. Noglows

William P. Noglows, a director at Aspen Aerogels Inc., reported a transaction on June 23, 2026. He acquired 14,799 shares of Common Stock at a price of $4.75 per share. Following this transaction, Noglows directly owns 114,156 shares of Common Stock. Additionally, he indirectly holds 10,000 shares through a trust for one child and another 10,000 shares through a trust for another child, where he serves as the Trustee for both. The filing also notes the exercise of 14,799 stock options, which were fully vested, with an exercise price of $4.75.