Aspen Aerogels (ASPN) 10% Owner Wood River Capital Sells Shares

What Happened
Wood River Capital, LLC — a reported 10% owner of Aspen Aerogels (ASPN) — sold 12,280,426 shares on September 23, 2026 at $4.73 per share, generating proceeds of approximately $58,086,415. This was a sale (disposition) reported on a Form 4 filed September 24, 2026.

Key Details

• Transaction type/code: Sale (S) — open market or private sale reported; executed as a single block trade at $4.73 per share (Footnote 1).
• Shares sold: 12,280,426; Total proceeds: ~$58.09 million.
• Transaction date: 2026-09-23; Form 4 filed: 2026-09-24 (timely filing).
• Shares owned after transaction: Not specified in the filing.
• Ownership chain (Footnote 2): Wood River is beneficially owned through a chain of entities ultimately owned by Koch Industries, Inc. — SCC Holdings, KIM, KIG, KIGH — which may be deemed to beneficially own these shares.

Context
This sale comes from a 10% institutional owner, not an executive; such large disposals are often liquidity or portfolio-management actions and do not, by themselves, indicate management’s view of the company. The filing notes the trade was a single block sale and identifies the broader ownership structure linking Wood River to Koch Industries.