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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
GXJ
176
Global X Japan
Japan
$11.7K +$17K +1,487 New
TRCT
177
Tower Research Capital (TRC)
New York
$11.3K -$69.8K -6,109 -81%
Nisa Investment Advisors
178
Nisa Investment Advisors
Missouri
$9.33K -$5.22K -457 -28%
GI
179
GAMMA Investing
California
$6.04K +$7.88K +689 +895%
SCM
180
Sterling Capital Management
North Carolina
$5.69K +$5.66K +495 +219%
AP
181
Aspect Partners
Virginia
$3.75K -$915 -80 -14%
Rockefeller Capital Management
182
Rockefeller Capital Management
New York
$2.97K +$3.96K +346 +1,153%
Optiver Holding
183
Optiver Holding
Netherlands
$2.78K -$2.95K -258 -42%
FDCDDQ
184
Federation des caisses Desjardins du Quebec
Quebec, Canada
$2.37K +$3.43K +300 New
SPIA
185
Steward Partners Investment Advisory
New York
$2.15K +$572 +50 +23%
EP
186
Essential Partners
California
$1.95K +$23 +2 +0.8%
NL
187
NVWM LLC
Pennsylvania
$1.77K +$846 +74 +49%
DAM
188
Delta Asset Management
Tennessee
$1.62K +$57 +5 +3%
CFM
189
Cornerstone Financial Management
Massachusetts
$1.62K +$2.34K +205 New
FFA
190
Farther Finance Advisors
California
$1.4K +$1.16K +101 +131%
S
191
SignatureFD
Georgia
$1.36K +$1.97K +172 New
AAG
192
Armstrong Advisory Group
Massachusetts
$1.17K +$1.69K +148 New
OP
193
ORG Partners
Indiana
$946 +$1.37K +120 New
FFO
194
Fortitude Family Office
Arizona
$797 – – –
AF
195
Allworth Financial
California
$553 +$480 +42 +150%
TWD
196
True Wealth Design
Ohio
$482 – – –
QA
197
Quattro Advisors
Pennsylvania
$319 +$457 +40 New
HCM
198
Hollencrest Capital Management
California
$316 – – –
EWA
199
EverSource Wealth Advisors
Alabama
$158 – – –
DT
200
DV Trading
Illinois
$126 +$183 +16 New
6 7
8
9 10

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.