Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionUSA Financial Portformulas Corp
Latest Disclosed Ownership5,101 shares
Latest Disclosed Value $ 644,511
USA Financial Portformulas Corp reports 3.70% increase in ownership of APH / Amphenol Corporation

On April 14, 2026 - USA Financial Portformulas Corp filed a 13F-HR form disclosing ownership of 5,101 shares of Amphenol Corporation (US:APH) valued at $644,511 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 4,919 shares of Amphenol Corporation. This represents a change in shares of 3.70% during the quarter. The current value of the position is $708,070 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-14 2026-03-31 13F Amphenol - Ordinary Shares - CL A 032095101 5,101 182 3.70 645 -3.01 0.1215
2026-01-14 2025-12-31 13F Amphenol - Ordinary Shares - CL A 032095101 4,919 -2,523 -33.90 665 -27.83 0.1209
2025-10-10 2025-09-30 13F Amphenol - Ordinary Shares - CL A 032095101 7,442 7,442 921 0.1623
2025-07-18 2025-06-30 13F Amphenol - Ordinary Shares - CL A 032095101 0 -1,218 -100.00 0 -100.00
2025-04-15 2025-03-31 13F Amphenol - Ordinary Shares - CL A 032095101 1,218 -118 -8.83 80 -14.13 0.0132
2025-01-14 2024-12-31 13F Amphenol - Ordinary Shares - CL A 032095101 1,336 -20,469 -93.87 93 -93.52 0.0146
2024-10-08 2024-09-30 13F Amphenol - Ordinary Shares - CL A 032095101 21,805 2,978 15.82 1,421 11.99 0.2209
2024-07-12 2024-06-30 13F Amphenol - Ordinary Shares - CL A 032095101 18,827 9,209 95.75 1,268 14.34 0.2057
2024-04-30 2024-03-31 13F Amphenol Corp - Ordinary Shares - CL A 032095101 9,618 8,496 757.22 1,109 899.10 0.1799
2024-02-07 2023-12-31 13F AMPHENOL CORP CL A 032095101 1,122 1,075 2,287.23 111 3,600.00 0.0195
2023-11-27 2023-09-30 13F AMPHENOL CORP CL A 032095101 47 0 0.00 4 0.00 0.0059
2023-11-27 2023-06-30 13F AMPHENOL CORP CL A 032095101 47 0 0.00 4 0.00 0.0061
2023-11-27 2023-03-31 13F AMPHENOL CORP CL A 032095101 47 -5 -9.62 4 0.00 0.0062
2022-10-24 2022-09-30 13F AMPHENOL CORP CL A 032095101 52 42 420.00 3 200.00 0.0047
2022-08-15 2022-06-30 13F AMPHENOL CORP CL A 032095101 10 -64 -86.49 1 -83.33 0.0012
2022-08-16 2022-03-31 13F AMPHENOL CORP CL A 032095101 74 -15,902 -99.54 6 -99.57 0.0064
2022-02-10 2021-12-31 13F AMPHENOL CORP CL A 032095101 15,976 15,912 24,862.50 1,397 27,840.00 1.1983
2021-11-08 2021-09-30 13F AMPHENOL CORP CL A 032095101 64 0 0.00 5 25.00 0.0045
2021-07-29 2021-06-30 13F AMPHENOL CORP CL A 032095101 64 42 190.91 4 300.00 0.0033
2021-05-06 2021-03-31 13F AMPHENOL CORP CL A 032095101 22 9 69.23 1 -50.00 0.0008
2021-01-29 2020-12-31 13F AMPHENOL CORP CL A 032095101 13 0 0.00 2 100.00 0.0016
2020-10-09 2020-09-30 13F AMPHENOL CORP CL A 032095101 13 0 0.00 1 0.00 0.0008
2020-08-11 2020-06-30 13F AMPHENOL CORP CL A 032095101 13 13 1 0.0007
2018-04-03 2018-03-31 13F AMPHENOL CORP CL A 032095101 0 -42,480 -100.00 0 -100.00
2018-02-13 2017-12-31 13F AMPHENOL CORP CL A 032095101 42,480 6,500 18.07 3,730 22.50 0.8871
2017-11-02 2017-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 35,980 -14,424 -28.62 3,045 -18.17 0.7257
2017-10-11 2017-09-30 13F AMPHENOL CORP CL A 032095101 36,021 -14,383 3,049
2017-08-23 2017-06-30 13F AMPHENOL CORP CL A 032095101 50,404 9,513 23.26 3,721 27.87 0.8976
2017-05-15 2017-03-31 13F AMPHENOL CORP CL A 032095101 40,891 -5,436 -11.73 2,910 -6.52 0.7007
2017-03-03 2016-12-31 13F AMPHENOL CORP CL A 032095101 46,327 46,327 3,113 0.7740
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.