Aspen Aerogels
ASPN
179 hedge funds and large institutions have $465M invested in Aspen Aerogels in 2026 Q2 according to their latest regulatory filings, with 37 funds opening new positions, 61 increasing their positions, 46 reducing their positions, and 22 closing their positions.
253% more call options, than puts
Call options by funds: $5.23M | Put options by funds: $1.48M
96% more capital invested
Capital invested by funds: $237M → $465M (+$228M)
68% more first-time investments, than exits
New positions opened: 37 | Existing positions closed: 22
33% more repeat investments, than reductions
Existing positions increased: 61 | Existing positions reduced: 46
8% more funds holding
Funds holding: 166 → 179 (+13)
4.92% more ownership
Funds ownership: 83.67% → 88.59% (+4.9%)
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
American Century Companies
Kansas City,
Missouri
|
+$6.19M |
| 2 |
Jacobs Levy Equity Management
Florham Park,
New Jersey
|
+$4.12M |
| 3 |
AQR Capital Management
Greenwich,
Connecticut
|
+$3.68M |
| 4 |
Acadian Asset Management
Boston,
Massachusetts
|
+$3.36M |
| 5 |
BlackRock
New York
|
+$2.62M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
NIM
Needham Investment Management
New York
|
-$6.17M |
| 2 |
Invesco
Atlanta,
Georgia
|
-$3.33M |
| 3 |
HF
HRT Financial
New York
|
-$2.98M |
| 4 |
SM
Samjo Management
New York
|
-$2.21M |
| 5 |
Citadel Advisors
Miami,
Florida
|
-$1.68M |
ASPN Hedge Fund Activity: Q2 2026 in Review
179 of the 8,349 institutional investors tracked by Wall St. Rank reported a position in Aspen Aerogels (ASPN) for Q2 2026, worth a combined $465M — up 96% from $237M a quarter earlier.
Buyers outnumbered sellers: 37 funds opened new ASPN positions and 22 closed out — a net gain of 15 holders — while 61 added to existing stakes and 46 trimmed.
The largest buyer was American Century Companies, adding an estimated $6.19M. The largest seller was Needham Investment Management, cutting an estimated $6.17M.
- 179 institutional investors held Aspen Aerogels (ASPN) as of Q2 2026, up from 166 in Q1 2026.
- Funds reported $465M of Aspen Aerogels stock for Q2 2026, up 96% quarter-over-quarter.
- 37 funds opened new Aspen Aerogels positions in Q2 2026 and 22 closed out, a net change of +15 holders.
- The largest Aspen Aerogels buyer in Q2 2026 was American Century Companies, an estimated $6.19M added.
- The largest Aspen Aerogels seller in Q2 2026 was Needham Investment Management, an estimated $6.17M sold.
Based on aggregated 13F filings for Q2 2026.