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Amprius Technologies
AMPX

204 hedge funds and large institutions have $534M invested in Amprius Technologies in 2025 Q4 according to their latest regulatory filings, with 48 funds opening new positions, 85 increasing their positions, 53 reducing their positions, and 29 closing their positions.

New
Increased
Maintained
Reduced
Closed

184% more call options, than puts

Call options by funds: $56.2M | Put options by funds: $19.8M

66% more first-time investments, than exits

New positions opened: 48 | Existing positions closed: 29

60% more repeat investments, than reductions

Existing positions increased: 85 | Existing positions reduced: 53

9% more funds holding

Funds holding: 187 → 204 (+17)

1.01% more ownership

Funds ownership: 50.86% → 51.88% (+1%)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

20% less capital invested

Capital invested by funds: $669M → $534M (-$135M)

Holders
204
Holders Change
+17
Holders Change %
+9.09%
% of All Funds
2.48%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
48
Increased
85
Reduced
53
Closed
29
Calls
$56.2M
Puts
$19.8M
Net Calls
+$36.5M
Net Calls Change
-$10.1M

Top Buyers

1
BlackRock
BlackRock
New York
+$15.6M
2
Hudson Bay Capital Management
Hudson Bay Capital Management
Connecticut
+$12.6M
3
William Blair Investment Management
William Blair Investment Management
Illinois
+$11.3M
4
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT)
United Kingdom
+$9.99M
5
HRCM
Hood River Capital Management
Florida
+$9.26M

Top Sellers

1
Citadel Advisors
Citadel Advisors
Florida
-$23.5M
2
BNP Paribas Financial Markets
BNP Paribas Financial Markets
France
-$14.1M
3
Invesco
Invesco
Georgia
-$12.2M
4
DCM
Driehaus Capital Management
Illinois
-$7.97M
5
Tudor Investment Corp
Tudor Investment Corp
Connecticut
-$7.53M
Name Holding Trade Value Shares
Change 		Change in
Stake
ACM
126
Aquatic Capital Management
Illinois
$207K +$300K +26,218 New
Creative Planning
127
Creative Planning
Kansas
$195K +$22.1K +1,935 +8%
LOAMU
128
Lombard Odier Asset Management (USA)
New York
$189K +$274K +23,942 New
DS
129
DRW Securities
Illinois
$184K +$78.9K +6,897 +42%
Focus Partners Wealth
130
Focus Partners Wealth
Massachusetts
$174K -$50.8K -4,442 -17%
Commonwealth Equity Services
131
Commonwealth Equity Services
Massachusetts
$170K +$247K +21,577 New
AC
132
AXQ Capital
New Jersey
$167K +$43.4K +3,798 +22%
TI
133
Tidal Investments
Wisconsin
$166K +$400 +35 +0.2%
BC
134
Bridgefront Capital
Texas
$163K +$236K +20,609 New
ProShare Advisors
135
ProShare Advisors
Maryland
$159K +$48.3K +4,222 +26%
AWP
136
Abacus Wealth Partners
California
$158K – – –
EL
137
EWA LLC
Pennsylvania
$157K +$8.27K +723 +4%
VOYA Investment Management
138
VOYA Investment Management
Georgia
$153K +$28.5K +2,494 +15%
VPIM
139
Vanguard Personalized Indexing Management
California
$142K -$19.2K -1,682 -9%
MFG
140
MidWestOne Financial Group
Iowa
$134K -$14.8K -1,297 -7%
Pictet Asset Management
141
Pictet Asset Management
Switzerland
$127K – – –
Envestnet Asset Management
142
Envestnet Asset Management
Illinois
$126K -$69.6K -6,086 -28%
NS
143
NBC Securities
Alabama
$123K +$81.5K +7,132 +85%
Wealthfront Advisers
144
Wealthfront Advisers
California
$113K +$164K +14,352 New
HighTower Advisors
145
HighTower Advisors
Illinois
$111K -$32K -2,803 -17%
CPA
146
Capital Performance Advisors
California
$110K +$160K +13,974 New
VA
147
Vident Advisory
Georgia
$107K +$155K +13,564 New
DG
148
DMC Group
Alabama
$104K +$2.97K +260 +2%
Victory Capital Management
149
Victory Capital Management
Texas
$101K +$11.4K +1,000 +8%
SRL
150
Scientech Research LLC
New Jersey
$101K +$146K +12,810 New
4 5
6
7 8

AMPX Hedge Fund Activity: Q4 2025 in Review

204 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Amprius Technologies (AMPX) for Q4 2025, worth a combined $534M — down 20% from $669M a quarter earlier.

Buyers outnumbered sellers: 48 funds opened new AMPX positions and 29 closed out — a net gain of 19 holders — while 85 added to existing stakes and 53 trimmed.

The largest buyer was BlackRock, adding an estimated $15.6M. The largest seller was Citadel Advisors, cutting an estimated $23.5M.

  • 204 institutional investors held Amprius Technologies (AMPX) as of Q4 2025, up from 187 in Q3 2025.
  • Funds reported $534M of Amprius Technologies stock for Q4 2025, down 20% quarter-over-quarter.
  • 48 funds opened new Amprius Technologies positions in Q4 2025 and 29 closed out, a net change of +19 holders.
  • The largest Amprius Technologies buyer in Q4 2025 was BlackRock, an estimated $15.6M added.
  • The largest Amprius Technologies seller in Q4 2025 was Citadel Advisors, an estimated $23.5M sold.

Based on aggregated 13F filings for Q4 2025.