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Amprius Technologies
AMPX

121 hedge funds and large institutions have $160M invested in Amprius Technologies in 2025 Q2 according to their latest regulatory filings, with 40 funds opening new positions, 45 increasing their positions, 21 reducing their positions, and 17 closing their positions.

New
Increased
Maintained
Reduced
Closed

931% more call options, than puts

Call options by funds: $9.63M | Put options by funds: $934K

188% more capital invested

Capital invested by funds: $55.7M → $160M (+$105M)

135% more first-time investments, than exits

New positions opened: 40 | Existing positions closed: 17

114% more repeat investments, than reductions

Existing positions increased: 45 | Existing positions reduced: 21

22% more funds holding

Funds holding: 99 → 121 (+22)

13.95% more ownership

Funds ownership: 17.63% → 31.58% (+14%)

33% less funds holding in top 10

Funds holding in top 10: 3 → 2 (-1)

Holders
121
Holders Change
+22
Holders Change %
+22.22%
% of All Funds
1.59%
Holding in Top 10
2
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-33.33%
% of All Funds
0.03%
New
40
Increased
45
Reduced
21
Closed
17
Calls
$9.63M
Puts
$934K
Net Calls
+$8.7M
Net Calls Change
+$4.94M

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$11.8M
2
Millennium Management
Millennium Management
New York
+$6.25M
3
Morgan Stanley
Morgan Stanley
New York
+$4.92M
4
Renaissance Technologies
Renaissance Technologies
New York
+$3.75M
5
JP Morgan Chase
JP Morgan Chase
New York
+$2.84M

Top Sellers

Rank Fund Capital Flow
1
UBS Group
UBS Group
Switzerland
-$1.06M
2
BOTOTLSJU
Board of Trustees of The Leland Stanford Junior University
California
-$874K
3
Blackstone Inc
Blackstone Inc
New York
-$691K
4
ACA
Apis Capital Advisors
New York
-$298K
5
FIA
FNY Investment Advisers
New York
-$298K
Name Holding Trade Value Shares
Change 		Change in
Stake
PAMP
26
Polar Asset Management Partners
Ontario, Canada
$1.16M +$773K +274,788 New
N
27
Nuveen
North Carolina
$914K +$545K +193,878 +832%
HF
28
HRT Financial
New York
$907K +$336K +119,622 +125%
EI
29
EAM Investors
California
$889K +$594K +211,252 New
Bank of New York Mellon
30
Bank of New York Mellon
New York
$816K +$456K +162,194 +514%
Verition Fund Management
31
Verition Fund Management
Connecticut
$748K +$308K +109,354 +160%
CSS
32
Cubist Systematic Strategies
Connecticut
$717K +$479K +170,405 New
Barclays
33
Barclays
United Kingdom
$705K +$369K +131,328 +363%
AllianceBernstein
34
AllianceBernstein
Tennessee
$691K +$297K +105,600 +181%
HHAM
35
HITE Hedge Asset Management
Massachusetts
$680K – – –
BNP Paribas Financial Markets
36
BNP Paribas Financial Markets
France
$672K +$433K +153,867 +2,677%
HA
37
Huntleigh Advisors
Missouri
$614K +$410K +145,914 New
GCM
38
Graham Capital Management
Connecticut
$596K +$398K +141,545 New
BCM
39
Bridgeway Capital Management
Texas
$568K -$169K -60,000 -31%
Bank of America
40
Bank of America
North Carolina
$534K +$120K +42,625 +51%
LPL Financial
41
LPL Financial
California
$529K +$8.01K +2,847 +2%
RhumbLine Advisers
42
RhumbLine Advisers
Massachusetts
$519K +$303K +107,570 +686%
FIA
43
Foundations Investment Advisors
Arizona
$389K +$260K +92,416 New
SH
44
SLT Holdings
Arizona
$386K +$258K +91,750 New
KWA
45
Kingswood Wealth Advisors
California
$360K +$240K +85,408 New
AQR Capital Management
46
AQR Capital Management
Connecticut
$337K +$6.29K +2,238 +3%
GCP
47
GSA Capital Partners
United Kingdom
$307K +$205K +73,035 New
Los Angeles Capital Management
48
Los Angeles Capital Management
California
$297K +$199K +70,577 New
Squarepoint
49
Squarepoint
New York
$275K +$184K +65,382 New
Deutsche Bank
50
Deutsche Bank
Germany
$259K +$85.8K +30,507 +99%
1
2
3 4 5

AMPX Hedge Fund Activity: Q2 2025 in Review

121 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in Amprius Technologies (AMPX) for Q2 2025, worth a combined $160M — up 188% from $55.7M a quarter earlier.

Buyers outnumbered sellers: 40 funds opened new AMPX positions and 17 closed out — a net gain of 23 holders — while 45 added to existing stakes and 21 trimmed.

The largest buyer was BlackRock, adding an estimated $11.8M. The largest seller was UBS Group, cutting an estimated $1.06M.

  • 121 institutional investors held Amprius Technologies (AMPX) as of Q2 2025, up from 99 in Q1 2025.
  • Funds reported $160M of Amprius Technologies stock for Q2 2025, up 188% quarter-over-quarter.
  • 40 funds opened new Amprius Technologies positions in Q2 2025 and 17 closed out, a net change of +23 holders.
  • The largest Amprius Technologies buyer in Q2 2025 was BlackRock, an estimated $11.8M added.
  • The largest Amprius Technologies seller in Q2 2025 was UBS Group, an estimated $1.06M sold.

Based on aggregated 13F filings for Q2 2025.