ASPEN AEROGELS INC (ASPN) is held by 93 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is BlackRock, Inc. as of Q1 2026.

Are institutions buying or selling ASPN?

In Q1 2026, 49 institutions opened or increased positions in ASPEN AEROGELS INC while 58 reduced or exited — a net selling quarter.

What is the Smart Money Verdict on ASPN?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for ASPEN AEROGELS INC.

How many hedge funds hold ASPN?

93 institutional investors report holding ASPEN AEROGELS INC (ASPN) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into ASPN?

As of Q1 2026, tracked institutions in ASPEN AEROGELS INC show 49 buyers versus 58 sellers — net outflows.

ASPEN AEROGELS INC

ASPN·04523Y105·US·Common Stock·Industrials - Building Products & Equipment-13D/G

Holders

Avg rating(21 Elite)

$122.4M

Total Value

46% (113)

Fund Consensus

49 buying - 58 selling

Smart Money Verdict

View all

Held by 93 funds

21 elite

Who's Trading

Activist

The Vanguard Group0.0%Mar 26, 2026

ActivistNINEEDHAM INVESTMENT MANAGEMENT L.L.C.5.3%Feb 13, 2026

InsiderYRYoung Donald RSell $184KNov 13, 2025

InsiderDPDaniel Santhosh PSell $15KAug 13, 2025

InsiderDPDaniel Santhosh PSell $32KAug 12, 2025

ActivistOIOaktop Capital Management II, L.P.5.3%May 15, 2025

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Decreased	4.7M(-3.8%)	$16.2M	0.0%	-56.99%	0
VAVANGUARD CAPITAL MANAGEMENT LLC	New	3.4M	$11.8M	0.0%	+54.49%	39
STATE STREET CORP	Decreased	2.3M(-7.2%)	$7.9M	0.0%	-53.87%	0
Invesco Ltd.	Decreased	2.3M(-44.4%)	$7.9M	0.0%	+26.14%	0
GEODE CAPITAL MANAGEMENT, LLC	Decreased	1.5M(-3.8%)	$5.3M	0.0%	-57.17%	0
AMERIPRISE FINANCIAL INC	Increased	1.5M(+9.3%)	$5.2M	0.0%	+72.97%	30
MILLENNIUM MANAGEMENT LLC	Increased	1.4M(+61.3%)	$4.8M	0.0%	-32.74%	39
MWMARSHALL WACE, LLP	Increased	1.3M(+127.9%)	$4.3M	0.0%	+20.14%	43
DIMENSIONAL FUND ADVISORS LP	Decreased	1.3M(-37.3%)	$4.3M	0.0%	-65.31%	0
AMERICAN CENTURY COMPANIES INC	Increased	1.2M(+7.8%)	$4.3M	0.0%	+14.07%	29
JACOBS LEVY EQUITY MANAGEMENT, INC	Increased	1.2M(+769.9%)	$4.2M	0.0%	+56.59%	43
ROYCE & ASSOCIATES LP	New	986,513	$3.4M	0.0%	+54.49%	37
GOLDMAN SACHS GROUP INC	Decreased	899,513(-30.5%)	$3.1M	0.0%	-35.05%	0
JPMORGAN CHASE & CO	Decreased	965,492(-34.9%)	$3.1M	0.0%	-19.02%	0
DED. E. Shaw & Co., Inc.	Increased	833,572(+3490.3%)	$2.9M	0.0%	+52.36%	42
VPVANGUARD PORTFOLIO MANAGEMENT LLC	New	716,732	$2.5M	0.0%	+54.49%	36
BNP PARIBAS FINANCIAL MARKETS	Increased	697,932(+1.0%)	$2.4M	0.0%	-35.74%	26
CITADEL ADVISORS LLC	Decreased	581,187(-32.9%)	$2M	0.0%	-41.35%	0
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Increased	556,725(+3.0%)	$1.9M	0.0%	-73.25%	27
AQR CAPITAL MANAGEMENT LLC	Increased	526,119(+42.2%)	$1.8M	0.0%	+21.61%	35