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Fri Oct 23 · markets open6 signals today103 insider buys this week · $208.8MCIRO short report next: Oct 31The week ahead

ASPN

ASPEN AEROGELS INC
NYSE · INDUSTRIALS · WHOLESALE-LUMBER & OTHER CONSTRUCTION MATERIALS
5.44
−0.19 −3.37%
USD · close Oct 22

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Who holds it

SEC 13F · LATEST QUARTER PER FUND
None of the 15 tracked funds disclose ASPN in their latest 13F. The funds we follow.

13F filings cover US-listed holdings and arrive up to 45 days after quarter end, so positions may have changed since.

Stakes of 5% or more

SCHEDULE 13D / 13G · LATEST PER HOLDER · TWO YEARS
Orin Hirschman and 1 related8.6%
SCHEDULE 13G · filed Oct 19 · passive · EDGAR ↗
Wood River Capital, LLC and 1 related0.0%
SCHEDULE 13D/A · filed Sep 24 · investment · EDGAR ↗

“Item 4 of the Initial Schedule 13D is hereby amended and supplemented as follows: On September 23, 2026, the Reporting Persons disposed of all Public Shares beneficially owned by the Reporting Persons and ceased to be the beneficial owner of any Public Shares. The Reporting Persons do not have any p…”

A 13D means the holder crossed 5% with intent beyond passive ownership and had to state a purpose; a 13G is the passive version. Every new 13D on tracked companies.

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