Aspen Aerogels Inc

NYSE:ASPNBasic MaterialsCBOEFTSE:MRUTNASDAQ:CELS

$5.52+1.47%At closeAt close · Sat 24 Oct · ≈ AED 20.27 · Market cap $458.1M · Next earnings Thu 5 Nov

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Aspen Aerogels Inc · Ownership · TradingHolo

Insider activity

Open-market trades from Form 4 filings

Insiders bought $0 and sold $58.27M in the filings shown.

Date	Name	Role	Type	Shares	Value
Wed, 30 Sep 2026	DEEGAN GLENN E.	officer: CAO, GC & Corp Secretary	F-InKind	1,143	$6.26K
Wed, 23 Sep 2026	Wood River Capital, LLC	other	S-Sale	12,280,426	$58.09M
Tue, 23 Jun 2026	NOGLOWS WILLIAM P	director	M-Exempt	14,799	$70.3K
Wed, 13 May 2026	Robinson Cari	director	A-Award	10,370	$0
Wed, 13 May 2026	Kool Kathleen	director	A-Award	10,370	$0
Wed, 13 May 2026	NOGLOWS WILLIAM P	director	A-Award	10,370	$0
Wed, 13 May 2026	SWEETNAM JAMES E	director	A-Award	10,370	$0
Wed, 13 May 2026	Mitchell Steven R	director	A-Award	10,370	$0
Sun, 8 Mar 2026	Landes Gregg	officer: Chief Operating Officer	F-InKind	1,924	$6.2K
Sun, 8 Mar 2026	Thoele Grant Douglas	officer: CFO & Treasurer	F-InKind	590	$1.9K
Sun, 8 Mar 2026	Whitaker Corby C	officer: Chief Commercial Officer	F-InKind	1,924	$6.2K
Sun, 8 Mar 2026	Young Donald R	director, officer: President and CEO	F-InKind	4,275	$13.77K
Thu, 5 Mar 2026	Thoele Grant Douglas	officer: CFO & Treasurer	F-InKind	2,368	$7.74K
Thu, 5 Mar 2026	Daniel Santhosh P	officer: Chief Accounting Officer	F-InKind	986	$3.22K
Thu, 5 Mar 2026	Whitaker Corby C	officer: SVP, Sales and Marketing	F-InKind	3,907	$12.78K
Thu, 5 Mar 2026	Landes Gregg	officer: SVP, Operations and Strat Deve	F-InKind	3,814	$12.47K
Thu, 5 Mar 2026	Young Donald R	director, officer: President and CEO	F-InKind	8,618	$28.18K
Wed, 4 Mar 2026	Thoele Grant Douglas	officer: CFO & Treasurer	A-Award	55,298	$0
Wed, 4 Mar 2026	Whitaker Corby C	officer: SVP, Sales and Marketing	A-Award	57,462	$0
Wed, 4 Mar 2026	DEEGAN GLENN E.	officer: CAO, GC & Corp Secretary	A-Award	55,503	$0
Wed, 4 Mar 2026	Landes Gregg	officer: SVP, Operations and Strat Deve	A-Award	57,462	$0
Wed, 4 Mar 2026	Young Donald R	director, officer: President and CEO	A-Award	156,716	$0
Thu, 13 Nov 2025	Young Donald R	director, officer: President and CEO	S-Sale	56,845	$183.61K

Institutional holders

From 13F filings · Tue, 30 Jun 2026

Holder	Shares	% out	Change
KIM, LLC	12,280,426	14.8%	+0
BlackRock, Inc.	5,277,148	6.4%	+534,072
OAKTOP CAPITAL MANAGEMENT II, L.P.	5,168,674	6.2%	+0
VANGUARD CAPITAL MANAGEMENT LLC	3,539,271	4.3%	+103,115
NEEDHAM INVESTMENT MANAGEMENT LLC	3,260,800	3.9%	−1,257,975
George Kaiser Family Foundation	3,167,322	3.8%	+0
STATE STREET CORP	2,559,495	3.1%	+238,768
AMERICAN CENTURY COMPANIES INC	2,510,042	3.0%	+1,262,259
JACOBS LEVY EQUITY MANAGEMENT, INC	2,058,083	2.5%	+839,304
AMERIPRISE FINANCIAL INC	1,821,295	2.2%	+314,916
GEODE CAPITAL MANAGEMENT, LLC	1,770,425	2.1%	+229,654
RICE HALL JAMES & ASSOCIATES, LLC	1,635,259	2.0%	+82,631
Invesco Ltd.	1,619,972	2.0%	−678,211