Aspen Aerogels Inc

ASPN

Exchange: NYSE
Industry: Wholesale-Lumber & Other Construction Materials
SEC CIK: 0001145986

SEC filings (opens in a new tab)

In the last 90 days, Aspen Aerogels Inc insiders filed 0 open-market purchases and 1 sale; 179 institutions reported holding it in 13F filings for Q2 2026, worth $464.9M in total; no superinvestor holds it.

Q4 2023 vs. Q3 2023

How the institutions holding Aspen Aerogels Inc changed between Q3 2023 and Q4 2023.

All holders in Q4 2023 All holders in Q3 2023

13F holders of ASPN: Q3 2023 compared with Q4 2023
Measure	Q3 2023	Of which not filed for Q4 2023	Q4 2023	Change
Holders	159	3	170	+14
Shares	67.8M	3.25M	75.0M	+10.4M (+16.2%)
Value	$582.9M	$27.9M	$1.18B	+$627.7M (+113.1%)

3 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so the changes leave them out.

New holders (33)

Institutions that held Aspen Aerogels Inc at the end of Q4 2023 but not at the end of Q3 2023.

Institutions new to ASPN in Q4 2023
Institution	Shares	Value	% of portfolio
Hood River Capital Management LLC	2,942,548	$46.4M	1.28%
Samjo Management, LLC	2,276,150	$35.9M	12.72%
Encompass Capital Advisors LLC	2,027,532	$32.0M	1.87%
Driehaus Capital Management LLC	996,043	$15.7M	0.19%
Mesirow Institutional Investment Management, Inc.	761,414	$12.0M	1.12%
Castleark Management LLC	250,060	$3.95M	0.17%
Invesco Ltd.	216,123	$3.41M	0.00%
EAM Investors, LLC	201,498	$3.18M	0.57%
Jane Street Group, LLC	174,831	$2.76M	0.00%
Clear Sky Advisers, LLC	139,343	$2.20M	1.03%
Jackson Creek Investment Advisors LLC	101,245	$1.60M	0.61%
Davy Global Fund Management Ltd	86,852	$1.37M	0.16%
Semanteon Capital Management, LP	76,761	$1.21M	0.82%
Marex Group plc	65,000	$1.03M	0.04%
Raymond James & Associates	52,399	$826.9K	0.00%
Los Angeles Capital Management LLC	28,626	$451.7K	0.00%
WealthTrust Axiom LLC	18,750	$295.9K	0.10%
Raymond James Financial Services Advisors, Inc.	16,794	$265.0K	0.00%
Balyasny Asset Management LLC	16,485	$260.1K	0.00%
Cornerstone Investment Partners, LLC	14,606	$230.5K	0.01%
Qube Research & Technologies Ltd	13,040	$205.8K	0.00%
Boothbay Fund Management, LLC	12,560	$198.2K	0.01%
McAdam, LLC	12,123	$191.3K	0.01%
Group One Trading, L.P.	8,587	$135.5K	0.00%
Quest Partners LLC	1,472	$23.2K	0.00%
Planned Solutions, Inc.	900	$14.2K	0.01%
Wetzel Investment Advisors, Inc.	400	$6.00K	0.00%
Tyler-Stone Wealth Management	200	$3.16K	0.00%
Advisory Services Network, LLC	100	$1.58K	0.00%
Valley National Advisers Inc	65	$1.00K	0.00%
GAMMA Investing LLC	50	$562	0.00%
C M Bidwell & Associates Ltd	32	$505	0.00%
Farther Finance Advisors, LLC	32	$505	0.00%

Sold out (19)

Institutions that held Aspen Aerogels Inc at the end of Q3 2023 and filed for Q4 2023 without it.

Institutions that sold out of ASPN in Q4 2023
Institution	Shares, Q3 2023	Value, Q3 2023
AMH Equity Ltd	362,970	$3.14M
ExodusPoint Capital Management, LP	277,967	$2.39M
Sora Investors LLC	250,000	$2.15M
Marshall Wace, LLP	193,020	$1.66M
Maven Securities LTD	100,000	$860.0K
Bridgewater Advisors Inc.	76,000	$653.6K
Levin Capital Strategies, L.P.	70,613	$607.3K
Prelude Capital Management, LLC	20,513	$176.4K
Millennium Management LLC	19,159	$164.8K
HRT Financial LP	18,703	$160.0K
Pinebridge Investments, L.P.	18,220	$156.7K
Bayesian Capital Management, LP	14,600	$125.6K
Regions Financial Corp	14,000	$120.4K
Gsa Capital Partners LLP	12,061	$104.0K
Cubist Systematic Strategies, LLC	2,693	$23.2K
Performa Ltd (US), LLC	273	$2.35K
Toronto Dominion Bank	158	$1.36K
Mendota Financial Group, LLC	47	$405
Allworth Financial LP	46	$396

Not filed for Q4 2023 yet (3)

Institutions that held Aspen Aerogels Inc at the end of Q3 2023 and haven't filed a 13F for Q4 2023. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ASPN in Q3 2023 that haven't filed for Q4 2023
Institution	Shares, Q3 2023	Value, Q3 2023
Samjo Capital LLC	3,015,000	$25.9M
Trellus Management Company, LLC	220,000	$1.89M
Quantamental Technologies LLC	10,423	$89.6K