Aspen Aerogels
ASPN
231 hedge funds and large institutions have $868M invested in Aspen Aerogels in 2024 Q4 according to their latest regulatory filings, with 64 funds opening new positions, 99 increasing their positions, 42 reducing their positions, and 70 closing their positions.
136% more repeat investments, than reductions
Existing positions increased: 99 | Existing positions reduced: 42
85% more call options, than puts
Call options by funds: $46.5M | Put options by funds: $25.1M
9% less first-time investments, than exits
New positions opened: 64 | Existing positions closed: 70
2.01% less ownership
Funds ownership: 91.03% → 89.02% (-2%)
5% less funds holding
Funds holding: 243 → 231 (-12)
38% less funds holding in top 10
Funds holding in top 10: 8 → 5 (-3)
55% less capital invested
Capital invested by funds: $1.93B → $868M (-$1.06B)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$27.1M |
| 2 |
CSS
Cubist Systematic Strategies
Stamford,
Connecticut
|
+$23.7M |
| 3 |
Point72 Asset Management
Stamford,
Connecticut
|
+$18.8M |
| 4 |
Alyeska Investment Group
Chicago,
Illinois
|
+$13.6M |
| 5 |
DC
Dendur Capital
New York
|
+$13.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
-$70.6M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$48.2M |
| 3 |
ECA
Encompass Capital Advisors
New York
|
-$47.2M |
| 4 |
Loomis, Sayles & Company
Boston,
Massachusetts
|
-$44.8M |
| 5 |
Macquarie Group
Sydney, NSW 2000,
Australia
|
-$15.2M |
ASPN Hedge Fund Activity: Q4 2024 in Review
231 of the 7,607 institutional investors tracked by Wall St. Rank reported a position in Aspen Aerogels (ASPN) for Q4 2024, worth a combined $868M — down 55% from $1.93B a quarter earlier.
Sellers outnumbered buyers: 70 funds closed out of ASPN and 64 opened new positions — a net loss of 6 holders — while 42 trimmed existing stakes and 99 added.
The largest buyer was Millennium Management, adding an estimated $27.1M. The largest seller was Driehaus Capital Management, exiting entirely with an estimated $70.6M sold.
- 231 institutional investors held Aspen Aerogels (ASPN) as of Q4 2024, down from 243 in Q3 2024.
- Funds reported $868M of Aspen Aerogels stock for Q4 2024, down 55% quarter-over-quarter.
- 64 funds opened new Aspen Aerogels positions in Q4 2024 and 70 closed out, a net change of -6 holders.
- The largest Aspen Aerogels buyer in Q4 2024 was Millennium Management, an estimated $27.1M added.
- The largest Aspen Aerogels seller in Q4 2024 was Driehaus Capital Management, an estimated $70.6M sold.
Based on aggregated 13F filings for Q4 2024.