Aspen Aerogels, Inc. (ASPN)
NYSE: ASPN · Wholesale-Lumber & Other Construction Materials · Northborough, MA · filing with the SEC since 2002
Grade3.9
◀ Past 5.0● Present 3.8▶ Future 3.2
Who owns Aspen Aerogels, Inc.
As filed with the SECHolders of 5% or more
2
Orin Hirschman holds 8.6% of Common Stock, $0.00001 par value per share, as its SCHEDULE 13G filed Oct 19, 2026 says.
Directors and officers
13
report now, of 32 people on the record since 2014. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Orin Hirschman
SCHEDULE 13G · filed Oct 19, 2026 · Common Stock, $0.00001 par value per share
Oaktop Capital Management II, L.P.
SCHEDULE 13G/A · filed May 15, 2025 · Common Stock, par value $0.00001 per share · 5.35% in May 15, 2025
Needham Investment Management L.L.C.
SCHEDULE 13G/A · filed Aug 13, 2026 · Common Stock, par value $0.00001 per share · reported falling below 5%, from 5.3% in Feb 13, 2026
Fmr LLC
SCHEDULE 13G/A · filed Feb 12, 2025 · COMMON STOCK · reported falling below 5%
Wood River Capital, LLC
SCHEDULE 13D/A · filed Sep 24, 2026 · Common stock, par value $0.00001 per share · reported falling below 5%
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%
What ASPN reports owning in othersstakes of 5% or more, and other ties
3 subsidiaries in 1 country, from the list filed with the 10-K filed Mar 13, 2026.
Insider tradesForm 4
1sales
0purchases
1sales on a scheduled plan
1people selling
$200,000sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 6, 2025 to Nov 6, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2025 runs to Nov 6, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window2 of 37 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Wood River Capital, LLC | 10% owner | 1 | $58.1M | 0 | 0 | $0 |
| Young Donald R | President and CEO | 1 | $200,000 | 1 | 0 | $0 |