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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
LFG
201
Larson Financial Group
Missouri
$118 +$171 +15 New
IA
202
IFP Advisors
Florida
$71 +$103 +9 New
AAP
203
Arax Advisory Partners
Colorado
$47 -$4.5K -394 -99%
CIBC Private Wealth Group
204
CIBC Private Wealth Group
Georgia
$8 +$11 +1 New
Tudor Investment Corp
205
Tudor Investment Corp
Connecticut
– -$7.53M -715,736 Closed
CLGM
206
Capitolis Liquid Global Markets
New York
– -$7.16M -680,600 Closed
Arrowstreet Capital
207
Arrowstreet Capital
Massachusetts
– -$4.96M -471,791 Closed
NCGI
208
Next Century Growth Investors
Minnesota
– -$2.41M -228,628 Closed
QC
209
Quadrature Capital
United Kingdom
– -$1.9M -180,197 Closed
XT
210
XTX Topco
Cayman Islands
– -$1.82M -173,005 Closed
HF
211
HRT Financial
New York
– -$1.58M -150,564 Closed
QT
212
Quantbot Technologies
New York
– -$1.39M -131,922 Closed
ET
213
Entropy Technologies
New York
– -$948K -90,101 Closed
PMAM
214
Picton Mahoney Asset Management
Ontario, Canada
– -$746K -70,981 Closed
BHCM
215
Brevan Howard Capital Management
Jersey
– -$734K -69,792 Closed
SSA
216
Schonfeld Strategic Advisors
New York
– -$688K -65,386 Closed
OAC
217
OMERS Administration Corp
Ontario, Canada
– -$677K -64,400 Closed
DTL
218
Dynamic Technology Lab
Singapore
– -$542K -51,550 Closed
HCA
219
Harbour Capital Advisors
Virginia
– -$511K -40,315 Closed
State of Wisconsin Investment Board
220
State of Wisconsin Investment Board
Wisconsin
– -$336K -31,944 Closed
DC
221
Diametric Capital
Massachusetts
– -$334K -31,740 Closed
Marshall Wace
222
Marshall Wace
United Kingdom
– -$319K -30,368 Closed
Group One Trading
223
Group One Trading
Illinois
– -$330K -28,891 Closed
AIM
224
Aigen Investment Management
New York
– -$286K -27,190 Closed
Zurich Cantonal Bank
225
Zurich Cantonal Bank
Switzerland
– -$282K -24,680 Closed
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.