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Amprius Technologies Warrants
AMPX.WS

14 hedge funds and large institutions have $25.8M invested in Amprius Technologies Warrants in 2025 Q4 according to their latest regulatory filings, with 1 funds opening new positions, 6 increasing their positions, 3 reducing their positions, and 5 closing their positions.

New
Increased
Maintained
Reduced
Closed

100% more repeat investments, than reductions

Existing positions increased: 6 | Existing positions reduced: 3

22% less funds holding

Funds holding: 18 → 14 (-4)

23% less capital invested

Capital invested by funds: $33.4M → $25.8M (-$7.63M)

80% less first-time investments, than exits

New positions opened: 1 | Existing positions closed: 5

Holders
14
Holders Change
-4
Holders Change %
-22.22%
% of All Funds
0.17%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
1
Increased
6
Reduced
3
Closed
5
Calls
$432K
Puts
–
Net Calls
+$432K
Net Calls Change
-$1.03M

Top Buyers

1
FBCM
Fort Baker Capital Management
California
+$1.25M
2
BFM
Boothbay Fund Management
New York
+$1.24M
3
Toronto Dominion Bank
Toronto Dominion Bank
Ontario, Canada
+$1.05M
4
Hudson Bay Capital Management
Hudson Bay Capital Management
Connecticut
+$509K
5
ZA
Zazove Associates
Nevada
+$279K

Top Sellers

1
MC
Meteora Capital
Florida
-$549K
2
CL
CSS LLC
Illinois
-$418K
3
AC
Aristeia Capital
Connecticut
-$259K
4
Janney Montgomery Scott
Janney Montgomery Scott
Pennsylvania
-$184K
5
WAM
Warberg Asset Management
Illinois
-$106K
Name Holding Trade Value Shares
Change 		Change in
Stake
LP
1
LMR Partners
United Kingdom
$11.2M +$119K +26,400 +0.6%
BFM
2
Boothbay Fund Management
New York
$3.71M +$1.24M +275,476 +142%
AC
3
Aristeia Capital
Connecticut
$2.34M -$259K -57,389 -6%
CM
4
Caption Management
Oklahoma
$1.75M – – –
Hudson Bay Capital Management
5
Hudson Bay Capital Management
Connecticut
$1.74M +$509K +112,727 +20%
FBCM
6
Fort Baker Capital Management
California
$1.06M +$1.25M +275,918 +200%
HCM
7
Highbridge Capital Management
New York
$979K – – –
Toronto Dominion Bank
8
Toronto Dominion Bank
Ontario, Canada
$969K +$1.05M +232,708 +161%
D.E. Shaw & Co
9
D.E. Shaw & Co
New York
$686K – – –
Janney Montgomery Scott
10
Janney Montgomery Scott
Pennsylvania
$614K -$184K -40,767 -15%
WAM
11
Wolverine Asset Management
Illinois
$556K +$33K +7,311 +3%
ZA
12
Zazove Associates
Nevada
$160K +$279K +61,891 New
Stifel Financial
13
Stifel Financial
Missouri
$55.3K -$51.9K -11,500 -35%
Cetera Investment Advisers
14
Cetera Investment Advisers
Illinois
$25.7K – – –
FFA
15
Farther Finance Advisors
California
$5 – – –
MC
16
Meteora Capital
Florida
– -$549K -150,000 Closed
CL
17
CSS LLC
Illinois
– -$418K -114,343 Closed
WAM
18
Warberg Asset Management
Illinois
– -$106K -29,000 Closed
CS
19
Clear Street
New York
– -$73.2K -20,000 Closed
UBS Group
20
UBS Group
Switzerland
– -$3.83K -1,046 Closed

AMPX.WS Hedge Fund Activity: Q4 2025 in Review

14 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Amprius Technologies Warrants (AMPX.WS) for Q4 2025, worth a combined $25.8M — down 23% from $33.4M a quarter earlier.

Sellers outnumbered buyers: 5 funds closed out of AMPX.WS and 1 opened new positions — a net loss of 4 holders — while 3 trimmed existing stakes and 6 added.

The largest buyer was Fort Baker Capital Management, adding an estimated $1.25M. The largest seller was Meteora Capital, exiting entirely with an estimated $549K sold.

  • 14 institutional investors held Amprius Technologies Warrants (AMPX.WS) as of Q4 2025, down from 18 in Q3 2025.
  • Funds reported $25.8M of Amprius Technologies Warrants stock for Q4 2025, down 23% quarter-over-quarter.
  • 1 fund opened new Amprius Technologies Warrants positions in Q4 2025 and 5 closed out, a net change of -4 holders.
  • The largest Amprius Technologies Warrants buyer in Q4 2025 was Fort Baker Capital Management, an estimated $1.25M added.
  • The largest Amprius Technologies Warrants seller in Q4 2025 was Meteora Capital, an estimated $549K sold.

Based on aggregated 13F filings for Q4 2025.