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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
BNP Paribas Financial Markets
26
BNP Paribas Financial Markets
France
$5.58M -$14.1M -1,236,826 -64%
TCM
27
Thames Capital Management
New Jersey
$4.16M – – –
EIM
28
Essex Investment Management
Massachusetts
$4.08M -$2.06M -180,622 -26%
Point72 Asset Management
29
Point72 Asset Management
Connecticut
$3.9M +$5.26M +459,946 +1,356%
Mirae Asset Global ETFs Holdings
30
Mirae Asset Global ETFs Holdings
Hong Kong
$3.87M -$224K -19,568 -4%
Two Sigma Advisers
31
Two Sigma Advisers
New York
$3.78M -$3.8M -332,500 -41%
Barclays
32
Barclays
United Kingdom
$3.71M +$3.85M +336,572 +252%
AIM
33
Artemis Investment Management
United Kingdom
$3.66M -$166K -14,489 -3%
Citadel Advisors
34
Citadel Advisors
Florida
$3.59M -$23.5M -2,051,945 -82%
OCM
35
Osterweis Capital Management
California
$3.59M +$3.06M +267,385 +143%
OC
36
Oppenheimer & Co
New York
$3.49M +$1.63M +142,751 +48%
SEI Investments
37
SEI Investments
Pennsylvania
$3.41M +$4.04M +353,066 +449%
EGM
38
Engineers Gate Manager
New York
$2.84M +$1.96M +171,577 +91%
SAM
39
Silvercrest Asset Management
New York
$2.84M +$4.11M +359,386 New
Bank of New York Mellon
40
Bank of New York Mellon
New York
$2.44M +$204K +17,810 +6%
Bank of America
41
Bank of America
North Carolina
$2.37M +$108K +9,485 +3%
Verition Fund Management
42
Verition Fund Management
Connecticut
$2.3M -$358K -31,347 -10%
Polen Capital Management
43
Polen Capital Management
Florida
$2.27M -$585K -51,137 -15%
Federated Hermes
44
Federated Hermes
Pennsylvania
$2.26M +$2.23M +194,855 +212%
Walleye Capital
45
Walleye Capital
New York
$2.13M +$1.58M +138,631 +106%
SG Americas Securities
46
SG Americas Securities
New York
$2.01M +$2.92M +255,252 New
EI
47
EAM Investors
California
$1.87M -$2.88M -251,720 -52%
Russell Investments Group
48
Russell Investments Group
United Kingdom
$1.85M -$801K -70,054 -23%
N
49
Nuveen
North Carolina
$1.84M -$104K -9,113 -4%
Raymond James Financial
50
Raymond James Financial
Florida
$1.77M -$178K -15,542 -6%
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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.