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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
Man Group
51
Man Group
United Kingdom
$148M +$116M +631,649 +412%
PAM
52
Panagora Asset Management
Massachusetts
$144M +$40.2M +218,284 +40%
Voloridge Investment Management
53
Voloridge Investment Management
Florida
$133M -$13.1M -71,084 -9%
Wellington Management Group
54
Wellington Management Group
Massachusetts
$131M -$36.7M -199,533 -22%
Two Sigma Investments
55
Two Sigma Investments
New York
$127M +$31.2M +169,523 +33%
Swiss National Bank
56
Swiss National Bank
Switzerland
$125M -$6.05M -32,900 -5%
CLOS
57
Compagnie Lombard Odier SCmA
Switzerland
$118M +$116M +629,316 New
GI
58
GAMCO Investors
Connecticut
$117M -$2.31M -12,570 -2%
Arrowstreet Capital
59
Arrowstreet Capital
Massachusetts
$117M +$36.6M +199,113 +47%
JHP
60
James Hambro & Partners
United Kingdom
$116M -$8.09M -43,970 -7%
JFL
61
Jarislowsky, Fraser Ltd
Quebec, Canada
$116M -$1.79M -9,712 -2%
Bessemer Group
62
Bessemer Group
New Jersey
$112M +$2.76M +14,977 +3%
SAM
63
Silvercrest Asset Management
New York
$110M -$4.57M -24,861 -4%
Natixis Advisors
64
Natixis Advisors
Massachusetts
$109M +$27.3M +148,459 +34%
HPC
65
HM Payson & Co
Maine
$106M +$156K +850 +0.2%
Acadian Asset Management
66
Acadian Asset Management
Massachusetts
$102M +$54.5M +295,950 +120%
Sumitomo Mitsui Trust Group
67
Sumitomo Mitsui Trust Group
Japan
$101M +$2.45M +13,300 +3%
William Blair & Company
68
William Blair & Company
Illinois
$99.5M -$29.5M -160,587 -23%
Thrivent Financial for Lutherans
69
Thrivent Financial for Lutherans
Minnesota
$98.8M +$64.4M +350,205 +199%
Royal London Asset Management
70
Royal London Asset Management
United Kingdom
$97.1M +$9.98M +54,228 +12%
Ensign Peak Advisors
71
Ensign Peak Advisors
Utah
$96.4M -$8.88M -48,243 -9%
N
72
Nuveen
North Carolina
$91.6M -$5.72M -31,111 -6%
American Century Companies
73
American Century Companies
Missouri
$89.5M -$543K -2,951 -0.6%
FGP
74
Freestone Grove Partners
California
$89.5M +$47M +255,641 +116%
Mitsubishi UFJ Asset Management
75
Mitsubishi UFJ Asset Management
Japan
$86.2M +$3.35M +18,212 +4%