Amprius Technologies
AMPX
187 hedge funds and large institutions have $669M invested in Amprius Technologies in 2025 Q3 according to their latest regulatory filings, with 86 funds opening new positions, 63 increasing their positions, 27 reducing their positions, and 19 closing their positions.
360% more call options, than puts
Call options by funds: $59.5M | Put options by funds: $12.9M
353% more first-time investments, than exits
New positions opened: 86 | Existing positions closed: 19
317% more capital invested
Capital invested by funds: $160M → $669M (+$509M)
133% more repeat investments, than reductions
Existing positions increased: 63 | Existing positions reduced: 27
55% more funds holding
Funds holding: 121 → 187 (+66)
19.28% more ownership
Funds ownership: 31.58% → 50.86% (+19%)
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
+$24.3M |
| 2 |
Citadel Advisors
Miami,
Florida
|
+$17.5M |
| 3 |
BlackRock
New York
|
+$17.2M |
| 4 |
Deutsche Bank
Frankfurt Am Main Ge,
Germany
|
+$15.8M |
| 5 |
Voloridge Investment Management
Jupiter,
Florida
|
+$14.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$23.8M |
| 2 |
Renaissance Technologies
New York
|
-$10.5M |
| 3 |
Marshall Wace
London,
United Kingdom
|
-$8.46M |
| 4 |
JP Morgan Chase
New York
|
-$5.74M |
| 5 |
BOTOTLSJU
Board of Trustees of The Leland Stanford Junior University
Redwood City,
California
|
-$4.83M |
AMPX Hedge Fund Activity: Q3 2025 in Review
187 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Amprius Technologies (AMPX) for Q3 2025, worth a combined $669M — up 317% from $160M a quarter earlier.
Buyers outnumbered sellers: 86 funds opened new AMPX positions and 19 closed out — a net gain of 67 holders — while 63 added to existing stakes and 27 trimmed.
The largest buyer was Driehaus Capital Management, opening a new position worth an estimated $24.3M. The largest seller was Millennium Management, cutting an estimated $23.8M.
- 187 institutional investors held Amprius Technologies (AMPX) as of Q3 2025, up from 121 in Q2 2025.
- Funds reported $669M of Amprius Technologies stock for Q3 2025, up 317% quarter-over-quarter.
- 86 funds opened new Amprius Technologies positions in Q3 2025 and 19 closed out, a net change of +67 holders.
- The largest Amprius Technologies buyer in Q3 2025 was Driehaus Capital Management, an estimated $24.3M added.
- The largest Amprius Technologies seller in Q3 2025 was Millennium Management, an estimated $23.8M sold.
Based on aggregated 13F filings for Q3 2025.