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Aspen Aerogels

181 hedge funds and large institutions have $424M invested in Aspen Aerogels in 2025 Q2 according to their latest regulatory filings, with 25 funds opening new positions, 76 increasing their positions, 53 reducing their positions, and 65 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more ownership

Funds ownership:

more funds holding in top 10

Funds holding in top 10:

7% less capital invested

Capital invested by funds: $458M → $424M (-$34.3M)

18% less funds holding

Funds holding: 221181 (-40)

62% less first-time investments, than exits

New positions opened: 25 | Existing positions closed: 65

Holders
181
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
$4.93M
Puts
$2.51M
Net Calls
Net Calls Change

Top Sellers

1 -$6.03M
2 -$5.83M
3 -$4.14M
4
DC
Dendur Capital
New York
-$4.12M
5
Millennium Management
Millennium Management
New York
-$3.98M
Name Holding Trade Value Shares
Change
Change in
Stake
76
$480K
77
$469K
78
$467K
79
$456K
80
$429K
81
$420K
82
$415K
83
$404K
84
$397K
85
$396K
86
$350K
87
$335K
88
$335K
89
$330K
90
$324K
91
$304K
92
$264K
93
$259K
94
$259K
95
$239K
96
$237K
97
$236K
98
$229K
99
$224K
100
$211K