Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionWatchman Group, Inc.
Latest Disclosed Ownership45,353 shares
Latest Disclosed Value $ 5,730,352
Watchman Group, Inc. reports 9.92% decrease in ownership of APH / Amphenol Corporation

On April 20, 2026 - Watchman Group, Inc. filed a 13F-HR form disclosing ownership of 45,353 shares of Amphenol Corporation (US:APH) valued at $5,730,352 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 50,348 shares of Amphenol Corporation. This represents a change in shares of -9.92% during the quarter. The current value of the position is $6,695,010 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)
2026-04-20 2026-03-31 13F AMPHENOL CL A 032095101 45,353 -4,995 -9.92 5,730 -15.78 1.3867
2026-02-06 2025-12-31 13F AMPHENOL CORP CL A 032095101 50,348 -5,409 -9.70 6,804 -1.38 1.6242
2025-11-13 2025-09-30 13F AMPHENOL CORP CL A 032095101 55,757 -5,240 -8.59 6,900 14.54 1.6703
2025-08-12 2025-06-30 13F AMPHENOL CORP CL A 032095101 60,997 -2,027 -3.22 6,023 45.73 1.5704
2025-05-13 2025-03-31 13F AMPHENOL CORP COM 032095101 63,024 -3,472 -5.22 4,134 -10.50 1.1584
2025-02-12 2024-12-31 13F AMPHENOL CORP CL A 032095101 66,496 -2,051 -2.99 4,618 3.40 1.2127
2024-11-12 2024-09-30 13F AMPHENOL CORP CL A 032095101 68,547 -2,145 -3.03 4,467 -6.22 1.1643
2024-08-14 2024-06-30 13F Amphenol CL A 032095101 70,692 34,724 96.54 4,763 14.80 1.5205
2024-05-09 2024-03-31 13F AMPHENOL CORP CL A 032095101 35,968 -13,617 -27.46 4,149 -15.61 1.2538
2024-02-13 2023-12-31 13F AMPHENOL CORP CL A 032095101 49,585 41 0.08 4,915 18.12 1.6199
2023-11-09 2023-09-30 13F Amphenol COM 032095101 49,544 410 0.83 4,161 -0.29 1.7674
2023-08-10 2023-06-30 13F Amphenol COM 032095101 49,134 219 0.45 4,174 4.40 2.0688
2023-05-11 2023-03-31 13F Amphenol COM 032095101 48,915 596 1.23 3,997 8.64 2.0855
2023-02-09 2022-12-31 13F Amphenol COM 032095101 48,319 451 0.94 3,679 14.79 2.0319
2022-11-15 2022-09-30 13F Amphenol COM 032095101 47,868 80 0.17 3,205 4.16 2.0158
2022-08-11 2022-06-30 13F Amphenol COM 032095101 47,788 285 0.60 3,077 -14.03 1.8969
2022-05-16 2022-03-31 13F Amphenol COM 032095101 47,503 891 1.91 3,579 -12.21 2.1223
2022-02-11 2021-12-31 13F Amphenol COM 032095101 46,612 -653 -1.38 4,077 17.80 2.1367
2021-11-09 2021-09-30 13F Amphenol COM 032095101 47,265 1,203 2.61 3,461 9.84 2.2302
2021-08-05 2021-06-30 13F Amphenol COM 032095101 46,062 377 0.83 3,151 4.55 1.8397
2021-05-05 2021-03-31 13F Amphenol COM 032095101 45,685 22,216 94.66 3,014 -1.79 1.8580
2021-02-01 2020-12-31 13F Amphenol COM 032095101 23,469 -735 -3.04 3,069 17.09 2.0367
2020-11-03 2020-09-30 13F Amphenol COM 032095101 24,204 -510 -2.06 2,621 10.73 1.9359
2020-07-07 2020-06-30 13F Amphenol COM 032095101 24,714 -235 -0.94 2,367 30.20 1.9657
2020-04-28 2020-03-31 13F Amphenol COM 032095101 24,949 -65 -0.26 1,818 -32.84 1.8731
2020-02-12 2019-12-31 13F Amphenol COM 032095101 25,014 25,014 2,707 2.0155
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.