Amphenol Corporation
MX ˙ BMV ˙ US0320951017
SecurityMX:APH / Amphenol Corporation
InstitutionCarderock Capital Management Inc
Latest Disclosed Ownership113,454 shares
Latest Disclosed Value $ 14,334,913
Carderock Capital Management Inc reports 8.34% decrease in ownership of APH / Amphenol Corporation

On April 10, 2026 - Carderock Capital Management Inc filed a 13F-HR form disclosing ownership of 113,454 shares of Amphenol Corporation (MX:APH) valued at $14,334,913 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 123,775 shares of Amphenol Corporation. This represents a change in shares of -8.34% during the quarter.

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)
2026-04-10 2026-03-31 13F AMPHENOL CORP CL A 032095101 113,454 -10,321 -8.34 14,335 -14.30 3.5412
2026-01-09 2025-12-31 13F AMPHENOL CORP CL A 032095101 123,775 -10,218 -7.63 16,727 0.87 4.0527
2025-10-17 2025-09-30 13F Amphenol COM 032095101 133,993 -3,288 -2.40 16,582 22.31 4.0316
2025-07-10 2025-06-30 13F Amphenol COM 032095101 137,281 -18,784 -12.04 13,556 32.43 3.4729
2025-05-27 2025-03-31 13F Amphenol COM 032095101 156,065 -9,900 -5.97 10,236 -11.19 2.7129
2025-01-15 2024-12-31 13F Amphenol COM 032095101 165,965 -6,153 -3.57 11,526 2.77 2.8911
2024-10-16 2024-09-30 13F Amphenol COM 032095101 172,118 -441 -0.26 11,215 -3.53 2.6478
2024-07-22 2024-06-30 13F Amphenol COM 032095101 172,559 87,909 103.85 11,625 19.06 3.0420
2024-04-23 2024-03-31 13F Amphenol COM 032095101 84,650 -3,837 -4.34 9,764 11.32 2.7370
2024-01-23 2023-12-31 13F Amphenol COM 032095101 88,487 5,327 6.41 8,772 25.59 2.4221
2023-10-23 2023-09-30 13F Amphenol COM 032095101 83,160 -1,286 -1.52 6,985 99,671.43 2.3439
2023-07-25 2023-06-30 13F Amphenol COM 032095101 84,446 3,843 4.77 7 -99.89 2.2244
2023-04-19 2023-03-31 13F Amphenol COM 032095101 80,603 -1,537 -1.87 6,587 109,666.67 2.2956
2023-01-20 2022-12-31 13F Amphenol COM 032095101 82,140 -471 -0.57 6 -99.89 2.5935
2022-11-04 2022-09-30 13F/A-1 Amphenol COM 032095101 82,611 -2,154 -2.54 5,532 1.37 2.8233
2022-10-21 2022-09-30 13F Amphenol COM 032095101 84,765 0 5,457 2.2792
2022-07-21 2022-06-30 13F Amphenol COM 032095101 84,765 1,815 2.19 5,457 -12.69 2.2792
2022-04-28 2022-03-31 13F Amphenol COM 032095101 82,950 -34,370 -29.30 6,250 -39.09 2.0183
2022-01-31 2021-12-31 13F Amphenol COM 032095101 117,320 -1,687 -1.42 10,261 17.74 2.4641
2021-10-29 2021-09-30 13F Amphenol COM 032095101 119,007 -782 -0.65 8,715 6.35 2.4559
2021-07-30 2021-06-30 13F Amphenol COM 032095101 119,789 103 0.09 8,195 3.79 2.2471
2021-05-07 2021-03-31 13F Amphenol COM 032095101 119,686 59,368 98.43 7,896 0.10 2.3589
2021-02-05 2020-12-31 13F Amphenol COM 032095101 60,318 618 1.04 7,888 22.03 2.3809
2020-10-27 2020-09-30 13F Amphenol COM 032095101 59,700 976 1.66 6,464 14.90 2.1835
2020-08-04 2020-06-30 13F Amphenol COM 032095101 58,724 -18 -0.03 5,626 31.42 2.0738
2020-05-11 2020-03-31 13F Amphenol COM 032095101 58,742 -7,699 -11.59 4,281 -40.47 1.9633
2020-02-04 2019-12-31 13F Amphenol COM 032095101 66,441 726 1.10 7,191 13.40 2.4130
2019-10-23 2019-09-30 13F Amphenol COM 032095101 65,715 202 0.31 6,341 0.89 2.3338
2019-07-15 2019-06-30 13F Amphenol COM 032095101 65,513 -43 -0.07 6,285 1.52 2.3725
2019-04-23 2019-03-31 13F Amphenol COM 032095101 65,556 23 0.04 6,191 16.61 2.5253
2019-02-14 2018-12-31 13F Amphenol COM 032095101 65,533 -4,370 -6.25 5,309 -19.22 2.7422
2018-11-13 2018-09-30 13F Amphenol COM 032095101 69,903 -14 -0.02 6,572 7.86 2.5925
2018-07-16 2018-06-30 13F Amphenol COM 032095101 69,917 -1,129 -1.59 6,093 -0.42 2.6288
2018-04-27 2018-03-31 13F Amphenol COM 032095101 71,046 -1,499 -2.07 6,119 -3.93 2.7014
2018-01-25 2017-12-31 13F Amphenol COM 032095101 72,545 -2,212 -2.96 6,369 0.66 2.8066
2017-11-15 2017-09-30 13F Amphenol COM 032095101 74,757 -219 -0.29 6,327 14.31 2.8541
2017-08-09 2017-06-30 13F Amphenol COM 032095101 74,976 -171 -0.23 5,535 3.50 2.4970
2017-04-17 2017-03-31 13F Amphenol COM 032095101 75,147 -4,081 -5.15 5,348 0.45 2.4741
2017-02-08 2016-12-31 13F Amphenol COM 032095101 79,228 -955 -1.19 5,324 2.29 2.6554
2016-11-02 2016-09-30 13F Amphenol COM 032095101 80,183 4,748 6.29 5,205 20.35 2.6062
2016-08-15 2016-06-30 13F Amphenol COM 032095101 75,435 -2,227 -2.87 4,325 -3.67 2.2889
2016-05-03 2016-03-31 13F Amphenol COM 032095101 77,662 -627 -0.80 4,490 9.81 2.3047
2016-02-11 2015-12-31 13F Amphenol COM 032095101 78,289 545 0.70 4,089 3.21 2.1284
2015-11-04 2015-09-30 13F Amphenol Corp New Cl A COM 032095101 77,744 85 0.11 3,962 -11.99 2.2093
2015-07-31 2015-06-30 13F Amphenol Corp New Cl A COM 032095101 77,659 -40 -0.05 4,502 -1.68 2.2600
2015-04-28 2015-03-31 13F Amphenol Corp New Cl A COM 032095101 77,699 -3,702 -4.55 4,579 4.54 2.2178
2015-02-11 2014-12-31 13F Amphenol Corp New Cl A COM 032095101 81,401 41,096 101.96 4,380 8.82 2.1568
2014-11-06 2014-09-30 13F Amphenol Corp New Cl A COM 032095101 40,305 -597 -1.46 4,025 2.13 2.0658
2014-08-06 2014-06-30 13F Amphenol Corp New Cl A COM 032095101 40,902 -251 -0.61 3,941 4.48 2.0556
2014-05-09 2014-03-31 13F Amphenol Corp New Cl A COM 032095101 41,153 -14 -0.03 3,772 2.75 1.9171
2014-02-11 2013-12-31 13F Amphenol Corp New Cl A COM 032095101 41,167 -34 -0.08 3,671 15.15 1.9248
2013-11-14 2013-09-30 13F Amphenol Corp New Cl A COM 032095101 41,201 126 0.31 3,188 -0.41 1.8483
2013-08-02 2013-06-30 13F Amphenol Corp New Cl A COM 032095101 41,075 41,075 3,201 1.8907
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.