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Aspen Aerogels

204 hedge funds and large institutions have $497M invested in Aspen Aerogels in 2025 Q3 according to their latest regulatory filings, with 51 funds opening new positions, 63 increasing their positions, 56 reducing their positions, and 28 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
204
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
3
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$11.6M
Puts
$3.28M
Net Calls
Net Calls Change

Top Sellers

1 -$10.4M
2 -$5.51M
3 -$3.14M
4
Renaissance Technologies
Renaissance Technologies
New York
-$3.05M
5
HF
HRT Financial
New York
-$3.02M
Name Holding Trade Value Shares
Change
Change in
Stake
26
$4.18M
27
$3.99M
28
$3.94M
29
$3.74M
30
$3.6M
31
$3.39M
32
$3.28M
33
$2.76M
34
$2.71M
35
$2.69M
36
$2.54M
37
$2.37M
38
$2.17M
39
$2.02M
40
$1.81M
41
$1.79M
42
$1.72M
43
$1.53M
44
$1.5M
45
$1.47M
46
$1.39M
47
$1.36M
48
$1.32M
49
$1.28M
50
$1.24M