Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionCommerce Bank
Latest Disclosed Ownership115,247 shares
Latest Disclosed Value $ 14,561,459
Commerce Bank reports 1.84% decrease in ownership of APH / Amphenol Corporation

On May 11, 2026 - Commerce Bank filed a 13F-HR form disclosing ownership of 115,247 shares of Amphenol Corporation (US:APH) valued at $14,561,458 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 117,406 shares of Amphenol Corporation. This represents a change in shares of -1.84% during the quarter. The current value of the position is $17,012,762 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)
2026-05-11 2026-03-31 13F AMPHENOL CL A 032095101 115,247 -2,159 -1.84 14,561 -8.23 0.0300
2026-02-13 2025-12-31 13F AMPHENOL CL A 032095101 117,406 -8,254 -6.57 15,866 2.03 0.0876
2025-11-12 2025-09-30 13F AMPHENOL CORP CL A 032095101 125,660 -13,147 -9.47 15,550 13.45 0.0865
2025-08-07 2025-06-30 13F AMPHENOL CORP CL A 032095101 138,807 -34,016 -19.68 13,707 20.93 0.0809
2025-05-08 2025-03-31 13F AMPHENOL CORP CL A 032095101 172,823 2,935 1.73 11,335 -3.92 0.0724
2025-02-13 2024-12-31 13F AMPHENOL CORP CL A 032095101 169,888 -14,824 -8.03 11,799 -1.97 0.0727
2024-11-08 2024-09-30 13F AMPHENOL CORP CL A 032095101 184,712 8,744 4.97 12,036 1.53 0.0738
2024-08-12 2024-06-30 13F AMPHENOL CORP CL A 032095101 175,968 76,179 76.34 11,855 2.99 0.0768
2024-05-03 2024-03-31 13F AMPHENOL CORP CL A 032095101 99,789 -9,288 -8.52 11,511 6.46 0.0761
2024-02-09 2023-12-31 13F AMPHENOL CORP CL A 032095101 109,077 -5,900 -5.13 10,813 11.97 0.0769
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 114,977 -9,614 -7.72 9,657 -8.77 0.0761
2023-08-08 2023-06-30 13F AMPHENOL CORP CL A 032095101 124,591 -5,023 -3.88 10,584 -0.08 0.0792
2023-05-04 2023-03-31 13F AMPHENOL CORP CL A 032095101 129,614 6,299 5.11 10,592 12.81 0.0830
2023-02-10 2022-12-31 13F AMPHENOL CORP CL A 032095101 123,315 -7,779 -5.93 9,389 6.96 0.0763
2022-11-04 2022-09-30 13F AMPHENOL CORP CL A 032095101 131,094 -10,938 -7.70 8,778 -4.00 0.0763
2022-08-12 2022-06-30 13F AMPHENOL CORP CL A 032095101 142,032 -23,617 -14.26 9,144 -26.74 0.0745
2022-05-09 2022-03-31 13F AMPHENOL CORP CL A 032095101 165,649 6,960 4.39 12,482 -10.07 0.0855
2022-02-14 2021-12-31 13F AMPHENOL CORP CL A 032095101 158,689 -19,497 -10.94 13,879 6.37 0.0907
2021-11-09 2021-09-30 13F AMPHENOL CORP CL A 032095101 178,186 -9,153 -4.89 13,048 1.81 0.0923
2021-08-09 2021-06-30 13F AMPHENOL CORP CL A 032095101 187,339 -5,053 -2.63 12,816 0.98 0.0910
2021-05-05 2021-03-31 13F AMPHENOL CORP CL A 032095101 192,392 91,740 91.15 12,692 -3.58 0.0965
2021-02-09 2020-12-31 13F AMPHENOL CORP CL A 032095101 100,652 -11,255 -10.06 13,163 8.64 0.1064
2020-11-06 2020-09-30 13F AMPHENOL CORP CL A 032095101 111,907 8,356 8.07 12,116 22.12 0.1096
2020-08-07 2020-06-30 13F AMPHENOL CORP CL A 032095101 103,551 2,905 2.89 9,921 35.26 0.0967
2020-05-08 2020-03-31 13F AMPHENOL CORP CL A 032095101 100,646 8,791 9.57 7,335 -26.21 0.0888
2020-02-14 2019-12-31 13F AMPHENOL CORP CL A 032095101 91,855 -4,488 -4.66 9,941 6.93 0.0947
2019-11-12 2019-09-30 13F AMPHENOL CORP CL A 032095101 96,343 62,439 184.16 9,297 185.80 0.0954
2019-08-07 2019-06-30 13F AMPHENOL CORP CL A 032095101 33,904 3,815 12.68 3,253 14.46 0.0365
2019-05-08 2019-03-31 13F AMPHENOL CORP CL A 032095101 30,089 -229 -0.76 2,842 15.72 0.0337
2019-02-11 2018-12-31 13F AMPHENOL CORP CL A 032095101 30,318 779 2.64 2,456 -11.59 0.0313
2018-11-02 2018-09-30 13F AMPHENOL CORP CL A 032095101 29,539 725 2.52 2,778 10.59 0.0331
2018-08-08 2018-06-30 13F AMPHENOL CORP CL A 032095101 28,814 -379 -1.30 2,512 -0.12 0.0319
2018-05-03 2018-03-31 13F AMPHENOL CORP CL A 032095101 29,193 3,342 12.93 2,515 10.79 0.0332
2018-02-12 2017-12-31 13F AMPHENOL CORP CL A 032095101 25,851 -370 -1.41 2,270 2.30 0.0295
2017-11-07 2017-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 26,221 -400 -1.50 2,219 12.93 0.0302
2017-11-07 2017-09-30 13F AMPHENOL CORP CL A 032095101 26,621 1,965
2017-08-08 2017-06-30 13F AMPHENOL CORP CL A 032095101 26,621 -100 -0.37 1,965 3.37 0.0276
2017-05-05 2017-03-31 13F AMPHENOL CORP CL A 032095101 26,721 4,684 21.26 1,901 28.36 0.0271
2017-02-08 2016-12-31 13F AMPHENOL CORP CL A 032095101 22,037 7,480 51.38 1,481 56.72 0.0221
2016-11-03 2016-09-30 13F AMPHENOL CORP CL A 032095101 14,557 -400 -2.67 945 10.27 0.0147
2016-08-09 2016-06-30 13F AMPHENOL CORP CL A 032095101 14,957 87 0.59 857 -0.23 0.0136
2016-04-27 2016-03-31 13F AMPHENOL CORP CL A 032095101 14,870 -512 -3.33 859 6.97 0.0143
2016-02-12 2015-12-31 13F AMPHENOL CORP CL A 032095101 15,382 -300 -1.91 803 0.50 0.0134
2015-11-10 2015-09-30 13F AMPHENOL CORP CL A 032095101 15,682 -194 -1.22 799 -13.25 0.0137
2015-08-03 2015-06-30 13F AMPHENOL CORP CL A 032095101 15,876 -182 -1.13 921 -2.64 0.0144
2015-05-06 2015-03-31 13F AMPHENOL CORP CL A 032095101 16,058 -464 -2.81 946 6.29 0.0147
2015-02-11 2014-12-31 13F AMPHENOL CORP CL A 032095101 16,522 8,543 107.07 890 11.81 0.0141
2014-11-06 2014-09-30 13F AMPHENOL CORP CL A 032095101 7,979 414 5.47 796 9.19 0.0131
2014-08-05 2014-06-30 13F AMPHENOL CORP CL A 032095101 7,565 2,475 48.62 729 56.44 0.0119
2014-05-09 2014-03-31 13F AMPHENOL CORP CL A 032095101 5,090 -1,559 -23.45 466 -21.42 0.0079
2014-02-14 2013-12-31 13F AMPHENOL CORP CL A 032095101 6,649 0 0.00 593 15.15 0.0103
2013-11-05 2013-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 6,649 0 515 0.0093
2013-11-05 2013-09-30 13F/A-2 AMPHENOL CORP CL A 032095101 6,649 0 0.00 515 -0.58 0.0093
2013-11-04 2013-09-30 13F AMPHENOL CORP CL A 032095101 6,649 515
2013-08-07 2013-06-30 13F AMPHENOL CORP CL A 032095101 6,649 -485 -6.80 518 -2.63 0.0096
2013-08-08 2013-03-31 13F/A-1 AMPHENOL CORP CL A 032095101 7,134 7,134 532 0.0104
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.