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Amtech Systems
ASYS

65 hedge funds and large institutions have $77.2M invested in Amtech Systems in 2025 Q4 according to their latest regulatory filings, with 23 funds opening new positions, 23 increasing their positions, 14 reducing their positions, and 11 closing their positions.

New
Increased
Maintained
Reduced
Closed

286% more call options, than puts

Call options by funds: $1.35M | Put options by funds: $350K

109% more first-time investments, than exits

New positions opened: 23 | Existing positions closed: 11

83% more capital invested

Capital invested by funds: $42.1M → $77.2M (+$35.1M)

64% more repeat investments, than reductions

Existing positions increased: 23 | Existing positions reduced: 14

20% more funds holding

Funds holding: 54 → 65 (+11)

11.07% more ownership

Funds ownership: 31.75% → 42.83% (+11%)

Holders
65
Holders Change
+11
Holders Change %
+20.37%
% of All Funds
0.79%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
23
Increased
23
Reduced
14
Closed
11
Calls
$1.35M
Puts
$350K
Net Calls
+$1M
Net Calls Change
+$532K

Top Buyers

1
Marshall Wace
Marshall Wace
United Kingdom
+$2.23M
2
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
+$1.48M
3
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$1.37M
4
Jane Street
Jane Street
New York
+$1.35M
5
Renaissance Technologies
Renaissance Technologies
New York
+$1.14M

Top Sellers

1
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
-$1.6M
2
Vanguard Group
Vanguard Group
Pennsylvania
-$397K
3
EFI
EHP Funds Inc
Canada
-$234K
4
WA
WealthTrust Axiom
Pennsylvania
-$221K
5
GS
GWN Securities
Florida
-$189K
Name Holding Trade Value Shares
Change 		Change in
Stake
Qube Research & Technologies (QRT)
26
Qube Research & Technologies (QRT)
United Kingdom
$527K +$378K +41,978 New
RWM
27
Ritholtz Wealth Management
New York
$497K +$357K +39,572 New
Northern Trust
28
Northern Trust
Illinois
$492K +$22.3K +2,474 +7%
EIM
29
Essex Investment Management
Massachusetts
$475K – – –
MFG
30
Merit Financial Group
Georgia
$464K +$333K +37,000 New
GCP
31
GSA Capital Partners
United Kingdom
$386K -$27.6K -3,069 -9%
Janney Montgomery Scott
32
Janney Montgomery Scott
Pennsylvania
$386K +$36.6K +4,060 +15%
QC
33
Quadrature Capital
United Kingdom
$383K +$275K +30,542 New
JF
34
Jump Financial
Illinois
$380K +$273K +30,300 New
IIM
35
Ironwood Investment Management
Massachusetts
$346K -$487 -54 -0.2%
BNP Paribas Financial Markets
36
BNP Paribas Financial Markets
France
$333K +$239K +26,568 New
Millennium Management
37
Millennium Management
New York
$285K +$97.3K +10,802 +90%
KA
38
Kovack Advisors
Florida
$276K -$91.4K -10,150 -32%
CC
39
Centiva Capital
New York
$274K +$197K +21,815 New
Hudson Bay Capital Management
40
Hudson Bay Capital Management
Connecticut
$270K +$194K +21,553 New
OQS
41
Occudo Quantitative Strategies
Florida
$267K +$192K +21,293 New
American Century Companies
42
American Century Companies
Missouri
$259K +$90.5K +10,043 +95%
SDJVC
43
St. Denis J. Villere & Co
Louisiana
$251K – – –
Squarepoint
44
Squarepoint
New York
$209K +$150K +16,677 New
OAC
45
OMERS Administration Corp
Ontario, Canada
$208K +$150K +16,600 New
AA
46
Ancora Advisors
Ohio
$204K -$171K -19,000 -54%
SFS
47
Sowell Financial Services
Arkansas
$203K +$146K +16,156 New
JIR
48
James Investment Research
Ohio
$183K – – –
NA
49
NewEdge Advisors
Louisiana
$183K – – –
Morgan Stanley
50
Morgan Stanley
New York
$166K +$49.3K +5,473 +71%
1
2
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ASYS Hedge Fund Activity: Q4 2025 in Review

65 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Amtech Systems (ASYS) for Q4 2025, worth a combined $77.2M — up 83% from $42.1M a quarter earlier.

Buyers outnumbered sellers: 23 funds opened new ASYS positions and 11 closed out — a net gain of 12 holders — while 23 added to existing stakes and 14 trimmed.

The largest buyer was Marshall Wace, adding an estimated $2.23M. The largest seller was Dimensional Fund Advisors, cutting an estimated $1.6M.

  • 65 institutional investors held Amtech Systems (ASYS) as of Q4 2025, up from 54 in Q3 2025.
  • Funds reported $77.2M of Amtech Systems stock for Q4 2025, up 83% quarter-over-quarter.
  • 23 funds opened new Amtech Systems positions in Q4 2025 and 11 closed out, a net change of +12 holders.
  • The largest Amtech Systems buyer in Q4 2025 was Marshall Wace, an estimated $2.23M added.
  • The largest Amtech Systems seller in Q4 2025 was Dimensional Fund Advisors, an estimated $1.6M sold.

Based on aggregated 13F filings for Q4 2025.