Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionColdstream Capital Management Inc
Latest Disclosed Ownership56,643 shares
Latest Disclosed Value $ 7,156,809
Coldstream Capital Management Inc reports 94.69% increase in ownership of APH / Amphenol Corporation

On May 8, 2026 - Coldstream Capital Management Inc filed a 13F-HR form disclosing ownership of 56,643 shares of Amphenol Corporation (US:APH) valued at $7,156,843 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 29,094 shares of Amphenol Corporation. This represents a change in shares of 94.69% during the quarter. The current value of the position is $8,361,640 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)
2026-05-08 2026-03-31 13F AMPHENOL CL A 032095101 56,643 27,549 94.69 7,157 82.04 0.0768
2026-02-09 2025-12-31 13F AMPHENOL CORP CL A 032095101 29,094 -2,704 -8.50 3,932 -0.08 0.0507
2025-11-19 2025-09-30 13F AMPHENOL CORP CL A 032095101 31,798 457 1.46 3,935 27.15 0.0530
2025-08-12 2025-06-30 13F AMPHENOL CORP CL A 032095101 31,341 1,436 4.80 3,095 57.78 0.0506
2025-05-13 2025-03-31 13F AMPHENOL CORP CL A 032095101 29,905 774 2.66 1,961 -3.06 0.0418
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 29,131 3,574 13.98 2,023 20.70 0.0431
2024-11-18 2024-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 25,557 2,468 10.69 1,676 7.78 0.0362
2024-11-18 2024-09-30 13F AMPHENOL CORP CL A 032095101 25,557 1,676
2024-08-07 2024-06-30 13F AMPHENOL CORP CL A 032095101 23,089 10,956 90.30 1,555 11.15 0.0379
2024-05-14 2024-03-31 13F AMPHENOL CORP CL A 032095101 12,133 172 1.44 1,400 18.06 0.0355
2024-02-09 2023-12-31 13F AMPHENOL CORP CL A 032095101 11,961 3,695 44.70 1,186 70.75 0.0332
2023-11-02 2023-09-30 13F AMPHENOL CORP CL A 032095101 8,266 -86 -1.03 694 -2.12 0.0227
2023-08-03 2023-06-30 13F AMPHENOL CORP CL A 032095101 8,352 -452 -5.13 710 -1.39 0.0225
2023-05-15 2023-03-31 13F AMPHENOL CORP CL A 032095101 8,804 56 0.64 719 7.96 0.0242
2023-01-10 2022-12-31 13F AMPHENOL CORP CL A 032095101 8,748 1,165 15.36 666 36.20 0.0244
2022-08-08 2022-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 7,583 1,072 16.46 489 -0.41 0.0190
2022-08-08 2022-06-30 13F AMPHENOL CORP CL A 032095101 4,654 -1,857 300 0.0128
2022-05-11 2022-03-31 13F AMPHENOL CORP CL A 032095101 6,511 -517 -7.36 491 -20.16 0.0169
2022-02-11 2021-12-31 13F AMPHENOL CORP CL A 032095101 7,028 -4,075 -36.70 615 -48.84 0.0193
2021-11-12 2021-09-30 13F AMPHENOL CORP CL A 032095101 11,103 6,703 152.34 1,202 299.34 0.0583
2021-08-16 2021-06-30 13F AMPHENOL CORP CL A 032095101 4,400 224 5.36 301 9.06 0.0121
2021-06-16 2021-03-31 13F AMPHENOL CORP CL A 032095101 4,176 -6,629 -61.35 276 -80.47 0.0162
2021-02-16 2020-12-31 13F AMPHENOL CORP CL A 032095101 10,805 484 4.69 1,413 26.50 0.0852
2020-11-16 2020-09-30 13F AMPHENOL CORP CL A 032095101 10,321 -30 -0.29 1,117 12.71 0.0930
2020-08-12 2020-06-30 13F AMPHENOL CORP CL A 032095101 10,351 78 0.76 991 32.31 0.0890
2020-05-27 2020-03-31 13F AMPHENOL CORP CL A 032095101 10,273 1,249 13.84 749 -23.26 0.0819
2020-02-13 2019-12-31 13F AMPHENOL CORP CL A 032095101 9,024 -15 -0.17 976 11.93 0.0800
2019-11-15 2019-09-30 13F AMPHENOL CORP CL A 032095101 9,039 9,039 872 0.0734
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.