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Aspen Aerogels
ASPN

Overview Fund Activity

181 hedge funds and large institutions have $422M invested in Aspen Aerogels in 2025 Q2 according to their latest regulatory filings, with 26 funds opening new positions, 75 increasing their positions, 53 reducing their positions, and 65 closing their positions.

Holders
181
Holders Change
-40
Holders Change %
-18.1%
% of All Funds
2.43%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.04%
New
26
Increased
75
Reduced
53
Closed
65
Calls
$4.13M
Puts
$1.9M
Net Calls
+$2.23M
Net Calls Change
-$8.38M

Top Buyers

1
GS
1
Gagnon Securities
New York
$11.2M
2
Federated Hermes
2
Federated Hermes
Pennsylvania
$10.5M
3
Goldman Sachs
3
Goldman Sachs
New York
$13M
4
Invesco
4
Invesco
Georgia
$4.93M
5
RHJA
5
Rice Hall James & Associates
California
$9.14M

Top Sellers

1
Fidelity Investments
1
Fidelity Investments
Massachusetts
$1M
2
AIC
2
AWM Investment Company
New York
$8.5M
3
MIM
3
MetLife Investment Management
New Jersey
$264K
4
DC
4
Dendur Capital
New York
$0
5
Millennium Management
5
Millennium Management
New York
$5.37M
Name Market Value Shares Shares
Change 		Shares
Change %
AQR Capital Management
51
AQR Capital Management
Connecticut
$1.12M 189,831 +39,645 +26%
UBS AM
52
UBS AM
Illinois
$1.09M 183,309 +44,887 +32%
Fidelity Investments
53
Fidelity Investments
Massachusetts
$1M 169,208 -1,047,932 -86%
Principal Financial Group
54
Principal Financial Group
Iowa
$988K 166,868 +166,868 New
Citadel Advisors
55
Citadel Advisors
Florida
$965K 163,032 -414,728 -72%
HP
56
Hartree Partners
New York
$888K 150,000 – –
LP
57
LMR Partners
United Kingdom
$839K 141,785 – –
AA
58
ALPS Advisors
Colorado
$824K 139,162 +12,836 +10%
Swiss National Bank
59
Swiss National Bank
Switzerland
$800K 135,200 – –
NL
60
Nuveen LLC
North Carolina
$792K 133,867 -35,606 -21%
SG Americas Securities
61
SG Americas Securities
New York
$792K 133,821 +66,427 +99%
Barclays
62
Barclays
United Kingdom
$768K 129,867 +46,093 +55%
FCM
63
Firsthand Capital Management
California
$740K 125,000 – –
IIM
64
Ironwood Investment Management
Massachusetts
$736K 124,324 +124,324 New
JF
65
Jump Financial
Illinois
$689K 116,400 +116,400 New
RhumbLine Advisers
66
RhumbLine Advisers
Massachusetts
$672K 113,506 +22,541 +25%
EC
67
EntryPoint Capital
New York
$626K 105,779 +40,969 +63%
CAU
68
Caxton Associates (UK)
$611K 103,172 +55,167 +115%
CSS
69
Cubist Systematic Strategies
Connecticut
$567K 95,758 -48,476 -34%
Verition Fund Management
70
Verition Fund Management
Connecticut
$563K 95,131 +69,427 +270%
LCM
71
Legato Capital Management
California
$554K 93,615 +53,337 +132%
IMC Chicago
72
IMC Chicago
Illinois
$516K 87,181 +40,041 +85%
AllianceBernstein
73
AllianceBernstein
Tennessee
$515K 87,040 +34,910 +67%
Jane Street
74
Jane Street
New York
$502K 84,880 +70,725 +500%
YIH
75
Y-Intercept (HK)
Hong Kong
$484K 81,684 +81,684 New
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