1,146 hedge funds and large institutions have $43B invested in Ametek in 2026 Q1 according to their latest regulatory filings, with 137 funds opening new positions, 461 increasing their positions, 367 reducing their positions, and 92 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
1,146
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
22
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$99M
Puts
$46.3M
Net Calls
Net Calls Change

Top Buyers

1 +$247M
2 +$168M
3 +$143M
4
Two Sigma Investments
Two Sigma Investments
New York
+$138M
5
JP Morgan Chase
JP Morgan Chase
New York
+$122M

Top Sellers

1 -$256M
2 -$232M
3 -$215M
4
BlackRock
BlackRock
New York
-$183M
5
ATO
Alecta Tjanstepension Omsesidigt
Sweden
-$165M
Name Holding Trade Value Shares
Change
Change in
Stake
AllianceBernstein
126
AllianceBernstein
Tennessee
$53.5M
Robeco Institutional Asset Management
127
Robeco Institutional Asset Management
Netherlands
$52.7M
SPI
128
Santori & Peters Inc
Pennsylvania
$52.6M
AAP
129
Aristotle Atlantic Partners
Florida
$52.2M
KBC Group
130
KBC Group
Belgium
$50.6M
Caisse de Depot et Placement du Quebec (CDPQ)
131
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
$50.5M
PAM
132
Panagora Asset Management
Massachusetts
$49.7M
Bank of Montreal
133
Bank of Montreal
Ontario, Canada
$49.6M
Aberdeen Group
134
Aberdeen Group
United Kingdom
$48M
NAM
135
Nissay Asset Management
Japan
$47.8M
EGM
136
Engineers Gate Manager
New York
$47.2M
FMI
137
Factory Mutual Insurance
Massachusetts
$46.6M
TCM
138
TimesSquare Capital Management
New York
$45.4M
Adage Capital Partners
139
Adage Capital Partners
Massachusetts
$44.2M
GAM
140
Guinness Asset Management
United Kingdom
$43.9M
SP
141
Sarasin & Partners
United Kingdom
$43.3M
JAM
142
Jupiter Asset Management
United Kingdom
$42.9M
Mawer Investment Management
143
Mawer Investment Management
Alberta, Canada
$42.6M
State Board of Administration of Florida Retirement System
144
State Board of Administration of Florida Retirement System
Florida
$42.2M
TD Asset Management
145
TD Asset Management
Ontario, Canada
$41.9M
PNC Financial Services Group
146
PNC Financial Services Group
Pennsylvania
$41.5M
Zurich Cantonal Bank
147
Zurich Cantonal Bank
Switzerland
$41.5M
Aviva
148
Aviva
United Kingdom
$40.7M
Citigroup
149
Citigroup
New York
$40.1M
FDCDDQ
150
Federation des caisses Desjardins du Quebec
Quebec, Canada
$39.1M