Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionJohnson Financial Group, Inc.
Latest Disclosed Ownership57,330 shares
Latest Disclosed Value $ 7,257,735
Johnson Financial Group, Inc. reports 15.78% increase in ownership of APH / Amphenol Corporation

On May 7, 2026 - Johnson Financial Group, Inc. filed a 13F-HR form disclosing ownership of 57,330 shares of Amphenol Corporation (US:APH) valued at $7,243,646 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 49,517 shares of Amphenol Corporation. This represents a change in shares of 15.78% during the quarter. The current value of the position is $8,463,055 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)
2026-05-07 2026-03-31 13F AMPHENOL CL A 032095101 57,330 7,813 15.78 7,258 8.26 0.1882
2026-02-12 2025-12-31 13F AMPHENOL CORP CL A 032095101 49,517 -8,685 -14.92 6,704 -7.06 0.2509
2025-11-13 2025-09-30 13F AMPHENOL CORP CL A 032095101 58,202 10,300 21.50 7,212 52.22 0.2706
2025-08-13 2025-06-30 13F AMPHENOL CORP CL A 032095101 47,902 -2,017 -4.04 4,738 44.36 0.2132
2025-05-15 2025-03-31 13F AMPHENOL CORP CL A 032095101 49,919 961 1.96 3,282 -5.28 0.1606
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 48,958 3,765 8.33 3,465 17.38 0.1638
2024-11-13 2024-09-30 13F AMPHENOL CORP CL A 032095101 45,193 35,923 387.52 2,952 372.32 0.1349
2024-08-14 2024-06-30 13F AMPHENOL CORP CL A 032095101 9,270 4,438 91.85 626 12.01 0.0303
2024-05-14 2024-03-31 13F AMPHENOL CORP CL A 032095101 4,832 44 0.92 558 17.47 0.0300
2024-02-09 2023-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 4,788 -299 -5.88 476 10.98 0.0260
2024-02-09 2023-12-31 13F AMPHENOL CORP CL A 032095101 4,788 -299 476 0.0157
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 5,087 -195 -3.69 428 -4.68 0.0298
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A 032095101 5,282 2,118 66.94 449 74.03 0.0311
2023-05-12 2023-03-31 13F AMPHENOL CORP CL A 032095101 3,164 -46 -1.43 259 5.74 0.0184
2023-02-13 2022-12-31 13F AMPHENOL CORP CL A 032095101 3,210 586 22.33 244 22.61 0.0194
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 2,624 -341 -11.50 199 4.19 0.0184
2022-08-15 2022-06-30 13F AMPHENOL CORP CL A 032095101 2,965 582 24.42 191 6.11 0.0137
2022-05-16 2022-03-31 13F AMPHENOL CORP CL A 032095101 2,383 938 64.91 180 42.86 0.0127
2022-02-14 2021-12-31 13F AMPHENOL CORP CL A 032095101 1,445 99 7.36 126 27.27 0.0080
2021-11-12 2021-09-30 13F AMPHENOL CL A 032095101 1,346 -382 -22.11 99 -16.10 0.0067
2021-08-13 2021-06-30 13F AMPHENOL CORP CL A 032095101 1,728 -34 -1.93 118 1.72 0.0077
2021-05-14 2021-03-31 13F AMPHENOL CL A 032095101 1,762 520 41.87 116 -28.83 0.0078
2021-02-12 2020-12-31 13F AMPHENOL CORP CL A 032095101 1,242 189 17.95 163 42.98 0.0139
2020-11-12 2020-09-30 13F AMPHENOL CORP CL A 032095101 1,053 277 35.70 114 54.05 0.0117
2020-08-11 2020-06-30 13F AMPHENOL CL A 032095101 776 -4 -0.51 74 29.82 0.0079
2020-05-14 2020-03-31 13F AMPHENOL CL A 032095101 780 -23 -2.86 57 -34.48 0.0068
2020-02-14 2019-12-31 13F AMPHENOL CL A 032095101 803 -200 -19.94 87 -10.31 0.0079
2019-11-12 2019-09-30 13F AMPHENOL CL A 032095101 1,003 153 18.00 97 18.29 0.0089
2019-08-09 2019-06-30 13F AMPHENOL CL A 032095101 850 -40 -4.49 82 -2.38 0.0073
2019-05-13 2019-03-31 13F AMPHENOL CL A 032095101 890 65 7.88 84 25.37 0.0075
2019-02-11 2018-12-31 13F AMPHENOL CL A 032095101 825 825 67 0.0069
2018-05-07 2018-03-31 13F AMPHENOL CL A 032095101 0 -4,737 -100.00 0 -100.00
2018-02-12 2017-12-31 13F AMPHENOL CL A 032095101 4,737 0 0.00 416 3.74 0.0509
2017-11-09 2017-09-30 13F AMPHENOL CL A 032095101 4,737 0 0.00 401 14.57 0.0527
2017-08-10 2017-06-30 13F AMPHENOL CL A 032095101 4,737 -550 -10.40 350 -6.91 0.0503
2017-05-12 2017-03-31 13F AMPHENOL CL A 032095101 5,287 -510 -8.80 376 -3.34 0.0473
2017-02-07 2016-12-31 13F/A-1 AMPHENOL CL A 032095101 5,797 -96 -1.63 389 1.57 0.0536
2017-02-02 2016-12-31 13F AMPHENOL CL A 032095101 5,797 389
2016-11-14 2016-09-30 13F AMPHENOL CL A 032095101 5,893 -8 -0.14 383 13.31 0.0511
2016-08-12 2016-06-30 13F AMPHENOL CL A 032095101 5,901 4,696 389.71 338 382.86 0.0468
2016-05-09 2016-03-31 13F AMPHENOL CL A 032095101 1,205 24 2.03 70 14.75 0.0140
2016-02-08 2015-12-31 13F AMPHENOL CL A 032095101 1,181 71 6.40 61 7.02 0.0127
2015-11-02 2015-09-30 13F AMPHENOL CL A 032095101 1,110 354 46.83 57 29.55 0.0125
2015-08-11 2015-06-30 13F AMPHENOL CL A 032095101 756 0 0.00 44 -2.22 0.0091
2015-05-12 2015-03-31 13F AMPHENOL CL A 032095101 756 0 0.00 45 9.76 0.0097
2015-02-10 2014-12-31 13F AMPHENOL CL A 032095101 756 378 100.00 41 7.89 0.0095
2014-11-14 2014-09-30 13F AMPHENOL CL A 032095101 378 0 0.00 38 5.56 0.0099
2014-08-06 2014-06-30 13F AMPHENOL CORP CL A 032095101 378 0 0.00 36 2.86 0.0095
2014-05-14 2014-03-31 13F AMPHENOL CORP CL A 032095101 378 0 0.00 35 2.94 0.0102
2014-02-11 2013-12-31 13F AMPHENOL CORP CL A 032095101 378 0 0.00 34 17.24 0.0098
2013-11-14 2013-09-30 13F AMPHENOL CORP CL A 032095101 378 0 0.00 29 0.00 0.0088
2013-08-14 2013-06-30 13F AMPHENOL CORP CL A 032095101 378 378 29 0.0081
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.