Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionAdviser Investments LLC
Latest Disclosed Ownership32,865 shares
Latest Disclosed Value $ 4,152,498
Adviser Investments LLC reports 57.51% increase in ownership of APH / Amphenol Corporation

On May 13, 2026 - Adviser Investments LLC filed a 13F-HR form disclosing ownership of 32,865 shares of Amphenol Corporation (US:APH) valued at $4,152,493 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 20,866 shares of Amphenol Corporation. This represents a change in shares of 57.51% during the quarter. The current value of the position is $4,561,991 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)
2026-05-13 2026-03-31 13F AMPHENOL CL A 032095101 32,865 11,999 57.51 4,152 47.29 0.0251
2026-02-12 2025-12-31 13F AMPHENOL CORP CL A 032095101 20,866 80 0.38 2,820 9.60 0.0308
2025-11-10 2025-09-30 13F AMPHENOL CORP CL A 032095101 20,786 366 1.79 2,572 27.58 0.0292
2025-08-06 2025-06-30 13F AMPHENOL CORP CL A 032095101 20,420 371 1.85 2,016 53.31 0.0252
2025-05-13 2025-03-31 13F AMPHENOL CORP CL A 032095101 20,049 -168 -0.83 1,315 -6.34 0.0166
2025-02-12 2024-12-31 13F AMPHENOL CORP CL A 032095101 20,217 1,798 9.76 1,404 17.00 0.0173
2024-11-08 2024-09-30 13F AMPHENOL CORP CL A 032095101 18,419 3,413 22.74 1,200 18.81 0.0150
2024-08-12 2024-06-30 13F AMPHENOL CORP CL A 032095101 15,006 7,503 100.00 1,011 16.76 0.0133
2024-04-29 2024-03-31 13F AMPHENOL CORP CL A 032095101 7,503 -51 -0.68 865 15.64 0.0116
2024-02-01 2023-12-31 13F AMPHENOL CORP CL A 032095101 7,554 -209 -2.69 749 14.72 0.0107
2023-10-11 2023-09-30 13F AMPHENOL CORP CL A 032095101 7,763 0 0.00 652 -1.06 0.0142
2023-08-04 2023-06-30 13F AMPHENOL CORP CL A 032095101 7,763 0 0.00 659 3.94 0.0144
2023-04-26 2023-03-31 13F AMPHENOL CORP CL A 032095101 7,763 0 0.00 634 1.28 0.0152
2023-01-19 2022-12-31 13F AMPHENOL CORP CL A 032095101 7,763 -335 -4.14 626 15.50 0.0156
2022-10-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 8,098 2,800 52.85 542 58.94 0.0382
2022-07-14 2022-06-30 13F AMPHENOL CORP CL A 032095101 5,298 0 0.00 341 -14.54 0.0230
2022-05-04 2022-03-31 13F AMPHENOL CORP CL A 032095101 5,298 -27 -0.51 399 -14.38 0.0258
2022-01-31 2021-12-31 13F AMPHENOL CORP CL A 032095101 5,325 0 0.00 466 19.49 0.0313
2021-11-05 2021-09-30 13F AMPHENOL CORP CL A 032095101 5,325 0 0.00 390 7.14 0.0291
2021-07-09 2021-06-30 13F AMPHENOL CORP CL A 032095101 5,325 27 0.51 364 4.00 0.0272
2021-05-05 2021-03-31 13F AMPHENOL CORP CL A 032095101 5,298 2,379 81.50 350 -8.38 0.0282
2021-01-26 2020-12-31 13F AMPHENOL CORP CL A 032095101 2,919 0 0.00 382 20.89 0.0339
2020-11-13 2020-09-30 13F AMPHENOL CORP CL A 032095101 2,919 19 0.66 316 13.67 0.0332
2020-08-03 2020-06-30 13F AMPHENOL CORP CL A 032095101 2,900 2,900 278 0.0340
2018-11-13 2018-09-30 13F AMPHENOL CORP CL A 032095101 0 -500 -100.00 0 -100.00
2018-08-02 2018-06-30 13F AMPHENOL CORP CL A 032095101 500 0 0.00 44 2.33 0.0049
2018-05-14 2018-03-31 13F AMPHENOL CORP CL A 032095101 500 500 43 0.0055
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.