Aspen Aerogels
ASPN
183 hedge funds and large institutions have $199M invested in Aspen Aerogels in 2025 Q4 according to their latest regulatory filings, with 42 funds opening new positions, 46 increasing their positions, 64 reducing their positions, and 58 closing their positions.
445% more call options, than puts
Call options by funds: $6.04M | Put options by funds: $1.11M
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
1.83% less ownership
Funds ownership: 86.65% → 84.82% (-1.8%)
10% less funds holding
Funds holding: 204 → 183 (-21)
28% less first-time investments, than exits
New positions opened: 42 | Existing positions closed: 58
28% less repeat investments, than reductions
Existing positions increased: 46 | Existing positions reduced: 64
60% less capital invested
Capital invested by funds: $497M → $199M (-$298M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Invesco
Atlanta,
Georgia
|
+$15M |
| 2 |
Ameriprise
Minneapolis,
Minnesota
|
+$7.11M |
| 3 |
NIM
Needham Investment Management
New York
|
+$4.7M |
| 4 |
American Century Companies
Kansas City,
Missouri
|
+$3.54M |
| 5 |
State Street
Boston,
Massachusetts
|
+$2.87M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AIC
AWM Investment Company
New York
|
-$7.81M |
| 2 |
PCM
Penn Capital Management
Philadelphia,
Pennsylvania
|
-$7.23M |
| 3 |
PIM
Peregrine Investment Management
Toronto,
Ontario, Canada
|
-$4.18M |
| 4 |
TAM
Telemark Asset Management
Boston,
Massachusetts
|
-$4.09M |
| 5 |
GA
Gagnon Advisors
New York
|
-$3.94M |
ASPN Hedge Fund Activity: Q4 2025 in Review
183 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Aspen Aerogels (ASPN) for Q4 2025, worth a combined $199M — down 60% from $497M a quarter earlier.
Sellers outnumbered buyers: 58 funds closed out of ASPN and 42 opened new positions — a net loss of 16 holders — while 64 trimmed existing stakes and 46 added.
The largest buyer was Invesco, adding an estimated $15M. The largest seller was AWM Investment Company, cutting an estimated $7.81M.
- 183 institutional investors held Aspen Aerogels (ASPN) as of Q4 2025, down from 204 in Q3 2025.
- Funds reported $199M of Aspen Aerogels stock for Q4 2025, down 60% quarter-over-quarter.
- 42 funds opened new Aspen Aerogels positions in Q4 2025 and 58 closed out, a net change of -16 holders.
- The largest Aspen Aerogels buyer in Q4 2025 was Invesco, an estimated $15M added.
- The largest Aspen Aerogels seller in Q4 2025 was AWM Investment Company, an estimated $7.81M sold.
Based on aggregated 13F filings for Q4 2025.