Aspen Aerogels
ASPN
221 hedge funds and large institutions have $458M invested in Aspen Aerogels in 2025 Q1 according to their latest regulatory filings, with 44 funds opening new positions, 83 increasing their positions, 67 reducing their positions, and 51 closing their positions.
284% more call options, than puts
Call options by funds: $14.3M | Put options by funds: $3.74M
24% more repeat investments, than reductions
Existing positions increased: 83 | Existing positions reduced: 67
2.16% less ownership
Funds ownership: 89.02% → 86.86% (-2.2%)
4% less funds holding
Funds holding: 231 → 221 (-10)
14% less first-time investments, than exits
New positions opened: 44 | Existing positions closed: 51
40% less funds holding in top 10
Funds holding in top 10: 5 → 3 (-2)
47% less capital invested
Capital invested by funds: $868M → $458M (-$410M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AIC
AWM Investment Company
New York
|
+$12M |
| 2 |
MIM
MetLife Investment Management
Whippany,
New Jersey
|
+$7.02M |
| 3 |
OCMI
Oaktop Capital Management II
Chatham,
New Jersey
|
+$6.31M |
| 4 |
PCM
Penn Capital Management
Philadelphia,
Pennsylvania
|
+$6.19M |
| 5 |
Goldman Sachs
New York
|
+$5.81M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Point72 Asset Management
Stamford,
Connecticut
|
-$13.1M |
| 2 |
CSS
Cubist Systematic Strategies
Stamford,
Connecticut
|
-$12M |
| 3 |
American Century Companies
Kansas City,
Missouri
|
-$11.9M |
| 4 |
UM
UniSuper Management
Melbourne, Victoria,
Australia
|
-$10.1M |
| 5 |
Alyeska Investment Group
Chicago,
Illinois
|
-$9.5M |
ASPN Hedge Fund Activity: Q1 2025 in Review
221 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in Aspen Aerogels (ASPN) for Q1 2025, worth a combined $458M — down 47% from $868M a quarter earlier.
Sellers outnumbered buyers: 51 funds closed out of ASPN and 44 opened new positions — a net loss of 7 holders — while 67 trimmed existing stakes and 83 added.
The largest buyer was AWM Investment Company, adding an estimated $12M. The largest seller was Point72 Asset Management, exiting entirely with an estimated $13.1M sold.
- 221 institutional investors held Aspen Aerogels (ASPN) as of Q1 2025, down from 231 in Q4 2024.
- Funds reported $458M of Aspen Aerogels stock for Q1 2025, down 47% quarter-over-quarter.
- 44 funds opened new Aspen Aerogels positions in Q1 2025 and 51 closed out, a net change of -7 holders.
- The largest Aspen Aerogels buyer in Q1 2025 was AWM Investment Company, an estimated $12M added.
- The largest Aspen Aerogels seller in Q1 2025 was Point72 Asset Management, an estimated $13.1M sold.
Based on aggregated 13F filings for Q1 2025.