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Amphenol
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Overview Fund Activity

1,410 hedge funds and large institutions have $74.1B invested in Amphenol in 2025 Q1 according to their latest regulatory filings, with 184 funds opening new positions, 593 increasing their positions, 463 reducing their positions, and 137 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
1,410
Holders Change
+22
Holders Change %
+1.59%
% of All Funds
19.16%
Holding in Top 10
46
Holding in Top 10 Change
-4
Holding in Top 10 Change %
-8%
% of All Funds
0.63%
New
184
Increased
593
Reduced
463
Closed
137
Calls
$259M
Puts
$179M
Net Calls
+$79.2M
Net Calls Change
+$60.6M

Top Buyers

1
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
$1.1B
2
UBS AM
UBS AM
Illinois
$574M
3
Wellington Management Group
Wellington Management Group
Massachusetts
$798M
4
Franklin Resources
Franklin Resources
California
$725M
5
BlackRock
BlackRock
New York
$6.68B

Top Sellers

1
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
$2.76B
2
Citadel Advisors
Citadel Advisors
Florida
$77M
3
Winslow Capital Management
Winslow Capital Management
Minnesota
$250K
4
Balyasny Asset Management
Balyasny Asset Management
Illinois
$38.9M
5
Mawer Investment Management
Mawer Investment Management
Alberta, Canada
$582M
Name Holding Trade Value Shares
Change 		Shares
Change %
Impax Asset Management Group
76
Impax Asset Management Group
United Kingdom
$128M +$128M +1,951,265 New
California State Teachers Retirement System (CalSTRS)
77
California State Teachers Retirement System (CalSTRS)
California
$124M -$696K -10,605 -0.6%
SCM
78
Snyder Capital Management
California
$123M -$10.1M -154,675 -8%
BAMCO Inc
79
BAMCO Inc
New York
$122M +$150K +2,284 +0.1%
National Bank of Canada
80
National Bank of Canada
Quebec, Canada
$121M +$3.44M +52,507 +3%
Public Employees Retirement Association of Colorado
81
Public Employees Retirement Association of Colorado
Colorado
$121M -$200K -3,042 -0.2%
Caisse de Depot et Placement du Quebec (CDPQ)
82
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
$120M -$26.6M -406,284 -18%
Citigroup
83
Citigroup
New York
$116M +$46.6M +709,827 +67%
ECU
84
Egerton Capital (UK)
United Kingdom
$116M +$116M +1,762,623 New
GT
85
Glenmede Trust
Pennsylvania
$109M +$4.56M +69,522 +4%
MC
86
Maren Capital
Illinois
$108M +$15.6M +237,395 +17%
Russell Investments Group
87
Russell Investments Group
United Kingdom
$107M +$3.3M +50,211 +3%
New York State Common Retirement Fund
88
New York State Common Retirement Fund
New York
$106M -$19.3M -294,581 -15%
TIA
89
Tandem Investment Advisors
South Carolina
$105M +$28.4M +433,063 +37%
Universal-Beteiligungs- und Servicegesellschaft
90
Universal-Beteiligungs- und Servicegesellschaft
Germany
$97.6M +$2.49M +37,939 +3%
RMDI
91
R.M. Davis Inc
Maine
$96.7M +$455K +6,930 +0.5%
HL
92
Harding Loevner
New Jersey
$92.9M +$92.9M +1,416,441 New
ACP
93
Atalan Capital Partners
New York
$91.5M – – –
CIC
94
Chilton Investment Company
Connecticut
$90.6M +$86.4M +1,316,880 +2,032%
NC
95
NZS Capital
Colorado
$90.2M +$26.4M +402,630 +41%
Adage Capital Partners
96
Adage Capital Partners
Massachusetts
$90M +$6.81M +103,900 +8%
Cerity Partners
97
Cerity Partners
New York
$89M +$12.6M +191,520 +16%
First Trust Advisors
98
First Trust Advisors
Illinois
$85.3M +$3.61M +55,052 +4%
Zurich Cantonal Bank
99
Zurich Cantonal Bank
Switzerland
$84.3M +$1.63M +24,846 +2%
Holocene Advisors
100
Holocene Advisors
New York
$84.2M +$42.3M +645,399 +101%
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