Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionSivia Capital Partners, LLC
Latest Disclosed Ownership6,619 shares
Latest Disclosed Value $ 836,311
Sivia Capital Partners, LLC reports 27.30% decrease in ownership of APH / Amphenol Corporation

On May 12, 2026 - Sivia Capital Partners, LLC filed a 13F-HR form disclosing ownership of 6,619 shares of Amphenol Corporation (US:APH) valued at $836,311 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 9,104 shares of Amphenol Corporation. This represents a change in shares of -27.30% during the quarter. The current value of the position is $918,783 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)
2026-05-12 2026-03-31 13F AMPHENOL CL A 032095101 6,619 -2,485 -27.30 836 -32.03 0.1622
2026-02-10 2025-12-31 13F AMPHENOL CORP CL A 032095101 9,104 991 12.21 1,230 22.63 0.2491
2025-10-20 2025-09-30 13F AMPHENOL CORP CL A 032095101 8,113 141 1.77 1,004 27.45 0.2834
2025-09-24 2025-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 7,972 -155 -1.91 787 47.65 0.2679
2025-07-09 2025-06-30 13F AMPHENOL CORP CL A 032095101 7,972 -155 787 0.2359
2025-04-14 2025-03-31 13F AMPHENOL CORP CL A 032095101 8,127 3,108 61.92 533 53.16 0.2488
2025-01-13 2024-12-31 13F AMPHENOL CORP CL A 032095101 5,019 -47 -0.93 349 5.45 0.1733
2024-10-11 2024-09-30 13F AMPHENOL CORP CL A 032095101 5,066 -128 -2.46 330 -5.44 0.1950
2024-08-05 2024-06-30 13F AMPHENOL CORP CL A 032095101 5,194 2,695 107.84 350 21.18 0.2340
2024-04-19 2024-03-31 13F AMPHENOL CORP CL A 032095101 2,499 -28 -1.11 288 15.20 0.1959
2024-03-13 2023-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 2,527 2,527 250 0.1908
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A 032095101 2,527 2,527 250 0.1374
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.