Wood River Capital, LLC - 23 Sep 2026 Form 4 Insider Report for ASPEN AEROGELS INC (ASPN)

Reporting relationship: Former 10% Owner
Issuer ticker: ASPN
Reported as of: 23 Sep 2026
Net transaction value: -$58,086,415
SEC form: 4
Accepted by SEC: 24 Sep 2026, 20:59:30 UTC
Prior SEC filing: 19 Aug 2024
Source filing: View source filing
Reporting owner signature: Wood River Capital, LLC /s/ Adam Schaeffer, Vice President and Secretary

Key filing fact

Wood River Capital, LLC filed Form 4 for ASPEN AEROGELS INC (ASPN) on 24 Sep 2026.

Key facts

This page summarizes Wood River Capital, LLC's Form 4 filing for ASPEN AEROGELS INC (ASPN).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 24 Sep 2026, 20:59.

Change

Previous filing in this sequence was filed on 19 Aug 2024.
Current net transaction value: -$58,086,415.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (2)

CIK 0001888978 Primary reporting owner

Wood River Capital, LLC

Relationship: Former 10% Owner
Address: 4111 E. 37TH STREET NORTH, WICHITA
Signature: Wood River Capital, LLC /s/ Adam Schaeffer, Vice President and Secretary
Signature date: 24 Sep 2026

CIK 0002027344

Koch, Inc.

Relationship: 10%+ Owner
Address: 4111 E. 37TH STREET NORTH, WICHITA
Signature: Koch, Inc. /s/ Adam Fitzsimmons, Assistant Secretary
Signature date: 24 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ASPN transaction

Common Stock

Sale

Transaction value: $58,086,415
Shares: -12,280,426
Change %: -100%
Price: $4.73
Shares after: 0
Date: 23 Sep 2026
Ownership: Direct
Footnotes: F1, F2

ASPN transaction

Common Stock

Sale

Transaction value: $58,086,415
Shares: -12,280,426
Change %: -100%
Price: $4.73
Shares after: 0
Date: 23 Sep 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Wood River Capital, LLC is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 2 footnotes

Footnote F1

The sale was executed in a single block trade at $4.73 per share.

Footnote F2

Wood River is beneficially owned by SCC Holdings, LLC ("SCC"), SCC is beneficially owned by KIM, LLC ("KIM"), KIM is beneficially owned by Koch Investments Group, LLC ("KIG"), KIG is beneficially owned by Koch Investments Group Holdings, LLC ("KIGH"), and KIGH is beneficially owned by Koch Industries, Inc. ("Koch Industries"), in each case by means of ownership of all voting equity instruments. Koch Industries, SCC, KIM, KIG, and KIGH may be deemed to beneficially own the shares of the Issuer's common stock beneficially owned by Wood River by virtue of (i) Koch Industries' beneficial ownership of KIGH, (ii) KIGH's beneficial ownership of KIG, (iii) KIG's beneficial ownership of KIM, (iv) KIM's beneficial ownership of SCC and (v) SCC's beneficial ownership of Wood River.