Aspen Aerogels

ASPN • NYSE

Aspen Aerogels is a construction company in the industrials sector on NYSE, led by Donald R. Young, with a market cap of $266.1M. As of Q3 2025, 87% of shares are held by 201 institutional investors, with KIM, LLC as the largest holder at 14.91%.

CEODonald R. Young

Market Cap$266.1M

Construction

Industrials

Employees548.0

Websiteaerogel.com

Country

United States of America

Overview

Overview of institutional ownership in ASPN as of Q3 2025 with a market cap of $573.2M

All Institutions

Institutions: 201
Value Held: $497.1M
Shares Held: 71.4M
Avg Position: $2.5M
Median Position: $278.4K

Hedge Funds

Hedge Funds: 34
Value Held: $96.5M
Shares Held: 13.9M
Avg Position: $2.8M
Median Position: $773.6K

Ownership Breakdown

Institutional (non-HF)

69.88%

$400.6M

Hedge Funds

16.84%

$96.5M

Retail & Other

13.29%

$76.2M

Based on market cap of $573.2M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in ASPN as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
K KIM, LLC Institution	-	$85.5M 19.59% of portfolio	14.91% 12.3M shares	Q2 2022 Held for 3y 5m	$436.3M
B BlackRock, Inc. Institution	-	$34.6M 0.00% of portfolio	6.04% 5.0M shares	Q2 2016 Held for 9y 5m	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$31.4M 0.00% of portfolio	5.48% 4.5M shares	Q2 2014 Held for 11y 5m	$6.69T
O OAKTOP CAPITAL MANAGEMENT II, L.P. Institution	-	$30.6M 2.77% of portfolio	5.34% 4.4M shares	Q3 2016 Held for 9y 2m	$1.1B
NEEDHAM INVESTMENT MANAGEMENT LLC Hedge Fund•Long/Short	George Austin Needham CEO	$23.9M 1.67% of portfolio	4.18% 3.4M shares	Q3 2015 Held for 10y 2m	$1.4B
G GEORGE KAISER FAMILY FOUNDATION Institution	-	$22.0M 3.09% of portfolio	3.85% 3.2M shares	Q2 2014 Held for 11y 5m	$712.6M
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$15.7M 0.00% of portfolio	2.73% 2.3M shares	Q2 2017 Held for 8y 5m	$466.32B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$13.5M 0.00% of portfolio	2.36% 1.9M shares	Q2 2019 Held for 6y 5m	$2.88T
T Telemark Asset Management, LLC Hedge Fund•Long/Short	Colin Mcnay President	$12.5M 1.18% of portfolio	2.18% 1.8M shares	Q4 2016 Held for 8y 11m	$1.1B
GAGNON SECURITIES LLC RIA/Wealth	Neil Joseph Gagnon CEO	$12.2M 2.47% of portfolio	2.13% 1.8M shares	Q2 2025 Held for 5 months	$493.8M

Net Capital Flow

Institutional buying and selling activity for ASPN in Q3 2025

Traded: +$88.6M
Buyers: 113
Sellers: 81
Total Bought: +$142.3M
Total Sold: −$53.7M
Avg Position: $2.2M

Biggest Buyers

Institution	Net Bought	Current Position
K KIM, LLC Institution	+$85.5M +12.3M shares	$85.5M 12.3M shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	+$6.6M +951.6K shares	$7.8M 1.1M shares
PEREGRINE INVESTMENT MANAGEMENT INC RIA/Wealth	+$4.2M +600.0K shares	$4.2M 600.0K shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$3.8M +540.8K shares	$10.1M 1.4M shares
F First Eagle Investment Management, LLC Long Only Manager	+$3.6M +517.3K shares	$3.6M 517.3K shares
TUDOR INVESTMENT CORP ET AL Hedge Fund•Multi-Strategy	+$3.4M +486.6K shares	$3.4M 486.6K shares
A AMERICAN CENTURY COMPANIES INC Institution	+$3.2M +456.3K shares	$3.3M 471.3K shares
NEEDHAM INVESTMENT MANAGEMENT LLC Hedge Fund•Long/Short	+$3.0M +425.5K shares	$23.9M 3.4M shares
J Jump Financial, LLC Institution	+$2.9M +421.0K shares	$3.7M 537.4K shares
Invesco Ltd. ETF Provider	+$2.7M +390.4K shares	$8.5M 1.2M shares

Biggest Sellers

Institution	Net Sold	Current Position
FEDERATED INVESTORS INC /PA/ Long Only Manager	−$10.3M −1.5M shares	$2.0M 289.9K shares
GOLDMAN SACHS GROUP INC Institution	−$5.4M −782.1K shares	$9.9M 1.4M shares
R ROYCE & ASSOCIATES LLC Institution	−$3.1M −531.1K shares	Sold Off 0 shares
FRONTIER CAPITAL MANAGEMENT CO LLC Long Only Manager	−$3.0M −508.7K shares	Sold Off 0 shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	−$3.0M −432.3K shares	$1.7M 246.9K shares
H HRT FINANCIAL LLC Institution	−$3.0M −428.3K shares	$1.2M 167.4K shares
P Palogic Value Management, L.P. RIA/Wealth	−$2.9M −410.0K shares	$1.4M 200.0K shares
Trexquant Investment LP Hedge Fund•Quant	−$2.7M −388.9K shares	$1.8M 260.2K shares
DIMENSIONAL FUND ADVISORS LP Long Only Manager	−$1.4M −197.1K shares	$15.7M 2.3M shares
C CastleKnight Management LP Hedge Fund•Event Driven	−$1.3M −192.8K shares	$1.1M 162.6K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited ASPN in Q3 2025

New Positions: 19
New Value: $10.0M
Exited Positions: 27
Exited Value: $12.3M

New Positions

Institution	Position Value
PEREGRINE INVESTMENT MANAGEMENT INC RIA/Wealth	$4.2M 600.0K shares
F First Eagle Investment Management, LLC Long Only Manager	$3.6M 517.3K shares
Atom Investors LP Hedge Fund•Market Neutral	$575.2K 82.6K shares
Counterpoint Mutual Funds LLC ETF Provider	$498.3K 71.6K shares
CWM Advisors, LLC ETF Provider	$460.2K 66.1K shares
E Entropy Technologies, LP Hedge Fund•Quant Macro	$161.6K 23.2K shares
S Sender Co & Partners, Inc. Institution	$150.3K 21.6K shares
T TCG Advisory Services, LLC RIA/Wealth	$117.9K 16.9K shares
Atomi Financial Group, Inc. RIA/Wealth	$104.4K 15.0K shares
HighTower Advisors, LLC RIA/Wealth	$75.5K 10.8K shares

Exited Positions

Institution	Previous Position
R ROYCE & ASSOCIATES LLC Institution	$3.1M 531.1K shares
FRONTIER CAPITAL MANAGEMENT CO LLC Long Only Manager	$3.0M 508.7K shares
PRINCIPAL FINANCIAL GROUP INC Institution	$987.9K 166.9K shares
H Hartree Partners, LP Institution	$888.0K 150.0K shares
L LMR Partners LLP Institution	$839.4K 141.8K shares
Y Y-Intercept Ltd Institution	$483.6K 81.7K shares
VOLORIDGE INVESTMENT MANAGEMENT, LLC Hedge Fund•Multi-Strategy	$466.8K 78.9K shares
ENVESTNET ASSET MANAGEMENT INC Long Only Manager	$396.1K 66.9K shares
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$349.9K 59.1K shares
THRIVENT FINANCIAL FOR LUTHERANS Insurance Manager	$329.9K 55.7K shares

Options Activity

Institutions with the largest Call and Put options positions in ASPN as of Q3 2025

Call Positions: 8
Call Value: $8.6M
Put Positions: 7
Put Value: $2.3M

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$5.6M 8.0K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$1.2M 1.7K contracts
W WOLVERINE TRADING, LLC Institution	$686.1K 969.0 contracts
J JANE STREET GROUP, LLC Institution	$448.9K 645.0 contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$407.2K 585.0 contracts
C Cubist Systematic Strategies, LLC Institution	$244.3K 351.0 contracts
Walleye Trading LLC RIA/Wealth	$88.4K 127.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	- - contracts

Put Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$1.1M 1.6K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$461.4K 663.0 contracts
C Cubist Systematic Strategies, LLC Institution	$306.9K 441.0 contracts
W WOLVERINE TRADING, LLC Institution	$263.4K 372.0 contracts
Walleye Trading LLC RIA/Wealth	$84.2K 121.0 contracts
J JANE STREET GROUP, LLC Institution	- - contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	- - contracts

Most Committed Institutions

Institutions with ASPN as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
K KIM, LLC Institution	-	19.59% $85.5M	14.91% 12.3M shares	Q2 2022 Held for 3y 5m	$436.3M
G GEORGE KAISER FAMILY FOUNDATION Institution	-	3.09% $22.0M	3.85% 3.2M shares	Q2 2014 Held for 11y 5m	$712.6M
O OAKTOP CAPITAL MANAGEMENT II, L.P. Institution	-	2.77% $30.6M	5.34% 4.4M shares	Q3 2016 Held for 9y 2m	$1.1B
GAGNON SECURITIES LLC RIA/Wealth	Neil Joseph Gagnon CEO	2.47% $12.2M	2.13% 1.8M shares	Q2 2025 Held for 5 months	$493.8M
G Gagnon Advisors, LLC Hedge Fund•Long/Short	Neil Joseph Gagnon CEO	2.43% $3.9M	0.69% 565.6K shares	Q2 2025 Held for 5 months	$162.0M
PEREGRINE INVESTMENT MANAGEMENT INC RIA/Wealth	Kevin James Anthony CCO	2.15% $4.2M	0.73% 600.0K shares	Q3 2025 Held for 2 months	$194.1M
NEEDHAM INVESTMENT MANAGEMENT LLC Hedge Fund•Long/Short	George Austin Needham CEO	1.67% $23.9M	4.18% 3.4M shares	Q3 2015 Held for 10y 2m	$1.4B
Firsthand Capital Management, Inc. Institution	Kevin Michael Landis CEO	1.48% $870.0K	0.15% 125.0K shares	Q1 2015 Held for 10y 8m	$58.8M
T Telemark Asset Management, LLC Hedge Fund•Long/Short	Colin Mcnay President	1.18% $12.5M	2.18% 1.8M shares	Q4 2016 Held for 8y 11m	$1.1B
A AWM Investment Company, Inc. Hedge Fund•Event Driven	David Michael Greenhouse President	1.02% $10.8M	1.89% 1.6M shares	Q4 2022 Held for 2y 11m	$1.1B

Hedge Fund Spotlight

Discover hedge funds investing in ASPN

CAPITAL FUND MANAGEMENT S.A.

Hedge Fund • Quant Macro

Portfolio ManagerJacques Charles Sauliere

Portfolio Value: $10.0B
Positions: 792
Last Reported: Q3 2025

Sector Allocation

Position in Aspen Aerogels

Market Value: $346.3K
Shares Held: 49.8K
Portfolio Weight: 0.00%
Owned Since: 2024-Q3

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