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Aspen Aerogels
ASPN

Overview Fund Activity

182 hedge funds and large institutions have $424M invested in Aspen Aerogels in 2025 Q2 according to their latest regulatory filings, with 26 funds opening new positions, 76 increasing their positions, 53 reducing their positions, and 65 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
182
Holders Change
-39
Holders Change %
-17.65%
% of All Funds
2.44%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.04%
New
26
Increased
76
Reduced
53
Closed
65
Calls
$4.93M
Puts
$2.51M
Net Calls
+$2.42M
Net Calls Change
-$8.18M

Top Buyers

1
GS
Gagnon Securities
New York
+$11.2M
2
Federated Hermes
Federated Hermes
Pennsylvania
+$10.5M
3
Goldman Sachs
Goldman Sachs
New York
+$5.49M
4
Invesco
Invesco
Georgia
+$4.5M
5
RHJA
Rice Hall James & Associates
California
+$4.24M

Top Sellers

1
Fidelity Investments
Fidelity Investments
Massachusetts
-$6.2M
2
AIC
AWM Investment Company
New York
-$6M
3
MIM
MetLife Investment Management
New Jersey
-$4.26M
4
DC
Dendur Capital
New York
-$4.12M
5
Millennium Management
Millennium Management
New York
-$4.1M
Name Holding Trade Value Shares
Change 		Shares
Change %
AQR Capital Management
51
AQR Capital Management
Connecticut
$1.12M +$235K +39,645 +26%
UBS AM
52
UBS AM
Illinois
$1.09M +$266K +44,887 +32%
Fidelity Investments
53
Fidelity Investments
Massachusetts
$1M -$6.2M -1,047,932 -86%
Principal Financial Group
54
Principal Financial Group
Iowa
$988K +$988K +166,868 New
Citadel Advisors
55
Citadel Advisors
Florida
$965K -$2.46M -414,728 -72%
HP
56
Hartree Partners
New York
$888K – – –
LP
57
LMR Partners
United Kingdom
$839K – – –
AA
58
ALPS Advisors
Colorado
$824K +$76K +12,836 +10%
Swiss National Bank
59
Swiss National Bank
Switzerland
$800K – – –
NL
60
Nuveen LLC
North Carolina
$792K -$211K -35,606 -21%
SG Americas Securities
61
SG Americas Securities
New York
$792K +$393K +66,427 +99%
Barclays
62
Barclays
United Kingdom
$768K +$273K +46,093 +55%
FCM
63
Firsthand Capital Management
California
$740K – – –
IIM
64
Ironwood Investment Management
Massachusetts
$736K +$736K +124,324 New
JF
65
Jump Financial
Illinois
$689K +$689K +116,400 New
RhumbLine Advisers
66
RhumbLine Advisers
Massachusetts
$672K +$133K +22,541 +25%
EC
67
EntryPoint Capital
New York
$626K +$243K +40,969 +63%
CAU
68
Caxton Associates (UK)
$611K +$327K +55,167 +115%
CSS
69
Cubist Systematic Strategies
Connecticut
$567K -$287K -48,476 -34%
Verition Fund Management
70
Verition Fund Management
Connecticut
$563K +$411K +69,427 +270%
LCM
71
Legato Capital Management
California
$554K +$316K +53,337 +132%
IMC Chicago
72
IMC Chicago
Illinois
$516K +$237K +40,041 +85%
AllianceBernstein
73
AllianceBernstein
Tennessee
$515K +$207K +34,910 +67%
Jane Street
74
Jane Street
New York
$502K +$419K +70,725 +500%
YIH
75
Y-Intercept (HK)
Hong Kong
$484K +$484K +81,684 New
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