We are live on ! Find out more
AMPX icon

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.

New
Increased
Maintained
Reduced
Closed

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)

Holders
187
Holders Change
+66
Holders Change %
+54.55%
% of All Funds
2.45%
Holding in Top 10
1
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-50%
% of All Funds
0.01%
New
86
Increased
63
Reduced
27
Closed
19
Calls
$59.5M
Puts
$12.9M
Net Calls
+$46.5M
Net Calls Change
+$37.8M

Top Buyers

Rank Fund Capital Flow
1
DCM
Driehaus Capital Management
Illinois
+$24.3M
2
Citadel Advisors
Citadel Advisors
Florida
+$17.5M
3
BlackRock
BlackRock
New York
+$17.2M
4
Deutsche Bank
Deutsche Bank
Germany
+$15.8M
5
Voloridge Investment Management
Voloridge Investment Management
Florida
+$14.8M

Top Sellers

Rank Fund Capital Flow
1
Millennium Management
Millennium Management
New York
-$23.8M
2
Renaissance Technologies
Renaissance Technologies
New York
-$10.5M
3
Marshall Wace
Marshall Wace
United Kingdom
-$8.46M
4
JP Morgan Chase
JP Morgan Chase
New York
-$5.74M
5
BOTOTLSJU
Board of Trustees of The Leland Stanford Junior University
California
-$4.83M
Name Holding Trade Value Shares
Change 		Change in
Stake
QC
51
Quadrature Capital
United Kingdom
$1.9M +$1.42M +180,197 New
Swiss National Bank
52
Swiss National Bank
Switzerland
$1.84M +$1.38M +175,300 New
CSS
53
Cubist Systematic Strategies
Connecticut
$1.84M +$34.3K +4,354 +3%
XT
54
XTX Topco
Cayman Islands
$1.82M +$1.28M +162,585 +1,560%
Calamos Advisors
55
Calamos Advisors
Illinois
$1.8M +$1.35M +171,052 New
LPL Financial
56
LPL Financial
California
$1.74M +$312K +39,687 +32%
HA
57
Huntleigh Advisors
Missouri
$1.64M +$79.9K +10,152 +7%
HF
58
HRT Financial
New York
$1.58M -$512K -65,069 -30%
AA
59
ALPS Advisors
Colorado
$1.57M +$1.17M +148,780 New
Barclays
60
Barclays
United Kingdom
$1.4M -$269K -34,169 -20%
QT
61
Quantbot Technologies
New York
$1.39M +$1.04M +131,922 New
AQR Capital Management
62
AQR Capital Management
Connecticut
$1.38M +$405K +51,509 +64%
Capital Fund Management (CFM)
63
Capital Fund Management (CFM)
France
$1.38M +$1.03M +131,411 New
Prudential Financial
64
Prudential Financial
New Jersey
$1.38M +$947K +120,445 +1,118%
Walleye Capital
65
Walleye Capital
New York
$1.38M +$1.03M +130,775 New
RhumbLine Advisers
66
RhumbLine Advisers
Massachusetts
$1.37M +$52.9K +6,731 +5%
Royal Bank of Canada
67
Royal Bank of Canada
Ontario, Canada
$1.34M +$879K +111,701 +712%
AllianceBernstein
68
AllianceBernstein
Tennessee
$1.3M -$316K -40,200 -25%
FIA
69
Foundations Investment Advisors
Arizona
$1.27M +$226K +28,718 +31%
SH
70
SLT Holdings
Arizona
$1.27M +$225K +28,550 +31%
UBS AM
71
UBS AM
Illinois
$1.23M +$916K +116,484 New
GCP
72
GSA Capital Partners
United Kingdom
$1.06M +$220K +28,018 +38%
Citigroup
73
Citigroup
New York
$1.02M +$491K +62,374 +182%
Federated Hermes
74
Federated Hermes
Pennsylvania
$966K +$722K +91,803 New
ET
75
Entropy Technologies
New York
$948K +$709K +90,101 New
1 2
3
4 5

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.