Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionWetherby Asset Management Inc
Latest Disclosed Ownership28,900 shares
Latest Disclosed Value $ 3,576,375
Wetherby Asset Management Inc reports 1.99% decrease in ownership of APH / Amphenol Corporation

On November 14, 2025 - Wetherby Asset Management Inc filed a 13F-HR form disclosing ownership of 28,900 shares of Amphenol Corporation (US:APH) valued at $3,576,375 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 14, 2025 disclosing 29,488 shares of Amphenol Corporation. This represents a change in shares of -1.99% during the quarter. The current value of the position is $4,011,609 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)
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A 032095101 28,900 -588 -1.99 3,576 22.84 0.1460
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A 032095101 29,488 -1,552 -5.00 2,912 35.08 0.1296
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 31,040 -914 -2.86 2,156 3.51 0.1034
2024-11-14 2024-09-30 13F AMPHENOL CORP CL A 032095101 31,954 -1,568 -4.68 2,082 -7.79 0.0952
2024-08-14 2024-06-30 13F AMPHENOL CORP CL A 032095101 33,522 16,570 97.75 2,258 15.50 0.1065
2024-05-15 2024-03-31 13F AMPHENOL CORP CL A 032095101 16,952 -227 -1.32 1,955 14.86 0.0932
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A 032095101 17,179 -566 -3.19 1,703 14.23 0.0887
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 17,745 -412 -2.27 1,490 -3.37 0.0845
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A 032095101 18,157 -370 -2.00 1,542 1.85 0.0831
2023-05-12 2023-03-31 13F AMPHENOL CORP CL A 032095101 18,527 -396 -2.09 1,514 5.14 0.0886
2023-02-14 2022-12-31 13F AMPHENOL CORP CL A 032095101 18,923 826 4.56 1,441 18.81 0.0925
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 18,097 347 1.95 1,212 6.13 0.0855
2022-08-15 2022-06-30 13F AMPHENOL CORP CL A 032095101 17,750 -129 -0.72 1,142 -15.22 0.0780
2022-05-16 2022-03-31 13F AMPHENOL CORP CL A 032095101 17,879 617 3.57 1,347 -10.79 0.0772
2022-02-14 2021-12-31 13F AMPHENOL CORP CL A 032095101 17,262 -83 -0.48 1,510 18.90 0.0848
2021-11-15 2021-09-30 13F AMPHENOL CORP CL A 032095101 17,345 -25 -0.14 1,270 6.81 0.0784
2021-08-16 2021-06-30 13F AMPHENOL CORP CL A 032095101 17,370 6,283 56.67 1,189 62.43 0.0725
2021-05-14 2021-03-31 13F AMPHENOL CORP CL A 032095101 11,087 2,378 27.31 732 -35.73 0.0558
2021-02-11 2020-12-31 13F AMPHENOL CORP CL A 032095101 8,709 8,107 1,346.68 1,139 1,652.31 0.0772
2020-12-16 2020-09-30 13F/A-01 AMPHENOL CORP CL A 032095101 5,001 -404 541 0.0496
2020-12-16 2020-09-30 13F/A-02 AMPHENOL CORP CL A 032095101 602 -4,803 -88.86 65 -87.45 0.1953
2020-11-13 2020-09-30 13F AMPHENOL CORP CL A 032095101 8,814 3,409 954 60,682.7767
2020-08-14 2020-06-30 13F AMPHENOL CORP CL A 032095101 5,405 -323 -5.64 518 23.92 0.0491
2020-05-06 2020-03-31 13F AMPHENOL CORP CL A 032095101 5,728 469 8.92 418 -26.54 0.0469
2020-01-28 2019-12-31 13F AMPHENOL CORP CL A 032095101 5,259 -129 -2.39 569 9.63 0.0560
2019-10-31 2019-09-30 13F AMPHENOL CORP CL A 032095101 5,388 496 10.14 519 10.66 0.0542
2019-07-25 2019-06-30 13F AMPHENOL CORP CL A 032095101 4,892 51 1.05 469 2.63 0.0513
2019-07-25 2019-03-31 13F/A-1 AMPHENOL CORP CL A 032095101 4,841 60 1.25 457 18.09 0.0569
2019-05-09 2019-03-31 13F AMPHENOL CORP CL A 032095101 4,841 60 457
2019-01-30 2018-12-31 13F AMPHENOL CORP CL A 032095101 4,781 76 1.62 387 -12.44 0.0547
2018-11-07 2018-09-30 13F AMPHENOL CORP CL A 032095101 4,705 142 3.11 442 11.06 0.0546
2018-07-24 2018-06-30 13F AMPHENOL CORP CL A 032095101 4,563 -157 -3.33 398 -2.21 0.0539
2018-05-04 2018-03-31 13F AMPHENOL CORP CL A 032095101 4,720 354 8.11 407 6.27 0.0562
2018-02-09 2017-12-31 13F AMPHENOL CORP CL A 032095101 4,366 305 7.51 383 11.34 0.0531
2017-11-13 2017-09-30 13F AMPHENOL CORP CL A 032095101 4,061 71 1.78 344 17.01 0.0512
2017-08-01 2017-06-30 13F AMPHENOL CORP CL A 032095101 3,990 752 23.22 294 27.27 0.0500
2017-04-27 2017-03-31 13F AMPHENOL CORP CL A 032095101 3,238 3,238 231 0.0415
2017-02-08 2016-12-31 13F AMPHENOL CORP CL A 032095101 0 -3,283 -100.00 0 -100.00
2016-11-14 2016-09-30 13F AMPHENOL CORP CL A 032095101 3,283 3,283 213 0.0431
2016-05-10 2016-03-31 13F AMPHENOL CORP CL A 032095101 0 0 0 0.0000
2016-02-08 2015-12-31 13F AMPHENOL CORP CL A 032095101 0 0 0 0.0000
2015-11-12 2015-09-30 13F AMPHENOL CORP CL A 032095101 0 -3,442 -100.00 0 -100.00
2015-08-12 2015-06-30 13F AMPHENOL CORP CL A 032095101 3,442 -96 -2.71 200 -4.31 0.0481
2015-05-08 2015-03-31 13F AMPHENOL CORP CL A 032095101 3,538 3,538 209 0.0509
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.