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1,033 hedge funds and large institutions have $37.4B invested in Ametek in 2025 Q3 according to their latest regulatory filings, with 120 funds opening new positions, 390 increasing their positions, 341 reducing their positions, and 74 closing their positions.

New
Increased
Maintained
Reduced
Closed

221% more call options, than puts

Call options by funds: $48.8M | Put options by funds: $15.2M

62% more first-time investments, than exits

New positions opened: 120 | Existing positions closed: 74

14% more repeat investments, than reductions

Existing positions increased: 390 | Existing positions reduced: 341

3% more funds holding

Funds holding: 1,0031,033 (+30)

2% more capital invested

Capital invested by funds: $36.8B → $37.4B (+$646M)

1.81% less ownership

Funds ownership: 88.14%86.33% (-1.8%)

7% less funds holding in top 10

Funds holding in top 10: 1514 (-1)

Holders
1,033
Holders Change
+30
Holders Change %
+2.99%
% of All Funds
13.56%
Holding in Top 10
14
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-6.67%
% of All Funds
0.18%
New
120
Increased
390
Reduced
341
Closed
74
Calls
$48.8M
Puts
$15.2M
Net Calls
+$33.6M
Net Calls Change
+$18.8M
Name Holding Trade Value Shares
Change
Change in
Stake
OQS
1051
Occudo Quantitative Strategies
Florida
-$1.67M -9,230 Closed
KM
1052
KP Management
Minnesota
-$1.5M -8,281 Closed
SRL
1053
Scientech Research LLC
New Jersey
-$1.36M -7,513 Closed
UOC
1054
UBS O'Connor
Illinois
-$1.1M -6,085 Closed
BCM
1055
Bayesian Capital Management
New York
-$976K -5,391 Closed
TSS
1056
Two Sigma Securities
New York
-$898K -4,961 Closed
TCM
1057
Teza Capital Management
Illinois
-$832K -4,598 Closed
SWM
1058
SeaCrest Wealth Management
New York
-$785K -4,338 Closed
FIM
1059
Freedom Investment Management
Connecticut
-$782K -4,322 Closed
SIG
1060
Sargent Investment Group
Maryland
-$784K -4,225 Closed
PC
1061
Promus Capital
Illinois
-$759K -4,196 Closed
Grantham, Mayo, Van Otterloo & Co (GMO)
1062
Grantham, Mayo, Van Otterloo & Co (GMO)
Massachusetts
-$651K -3,600 Closed
VT
1063
Volterra Technologies
New York
-$608K -3,358 Closed
ACS
1064
Archford Capital Strategies
Illinois
-$576K -3,183 Closed
CB
1065
Cooke & Bieler
Pennsylvania
-$574K -3,170 Closed
IMRF
1066
Illinois Municipal Retirement Fund
Illinois
-$538K -2,974 Closed
EC
1067
EntryPoint Capital
New York
-$493K -2,722 Closed
CIM
1068
Contravisory Investment Management
Massachusetts
-$463K -2,556 Closed
GCP
1069
GSA Capital Partners
United Kingdom
-$386K -2,134 Closed
HM
1070
Harvest Management
New York
-$362K -2,000 Closed
WAG
1071
Wallace Advisory Group
California
-$285K -1,656 Closed
TB
1072
Terril Brothers
Missouri
-$298K -1,645 Closed
PTC
1073
Petrus Trust Company
Texas
-$286K -1,578 Closed
Walleye Trading
1074
Walleye Trading
New York
-$270K -1,468 Closed
MPM
1075
MBB Public Markets
Illinois
-$265K -1,465 Closed