Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionM&t Bank Corp
Latest Disclosed Ownership219,443 shares
Latest Disclosed Value $ 27,726,623
M&t Bank Corp reports 11.38% decrease in ownership of APH / Amphenol Corporation

On May 12, 2026 - M&t Bank Corp filed a 13F-HR form disclosing ownership of 219,443 shares of Amphenol Corporation (US:APH) valued at $27,726,623 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on January 30, 2026 disclosing 247,629 shares of Amphenol Corporation. This represents a change in shares of -11.38% during the quarter. The current value of the position is $32,216,427 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 219,443 -28,186 -11.38 27,727 -17.15 0.0225
2026-01-30 2025-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 247,629 3,848 1.58 33,465 10.93 0.1074
2026-01-28 2025-12-31 13F AMPHENOL CORP CL A 032095101 47,760 -196,021 2,257 0.0013
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A 032095101 243,781 8,380 3.56 30,167 29.78 0.1014
2025-08-13 2025-06-30 13F AMPHENOL CORP CL A 032095101 235,401 -6,915 -2.85 23,246 46.26 0.0799
2025-04-30 2025-03-31 13F AMPHENOL CORP CL A 032095101 242,316 -41,900 -14.74 15,894 -19.48 0.0579
2025-02-06 2024-12-31 13F AMPHENOL CORP CL A 032095101 284,216 -5,161 -1.78 19,738 4.68 0.0662
2024-11-19 2024-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 289,377 -113,133 -28.11 18,856 -30.47 0.0620
2024-11-15 2024-09-30 13F AKAMAI TECHNOLOGIES COM 032095101 300,336 -102,174 19,820 0.0119
2024-07-31 2024-06-30 13F AMPHENOL CORP CL A 032095101 402,510 176,035 77.73 27,117 3.80 0.0925
2024-05-07 2024-03-31 13F AMPHENOL CORP CL A 032095101 226,475 -33,701 -12.95 26,124 1.29 0.0909
2024-02-06 2023-12-31 13F AMPHENOL CORP CL A 032095101 260,176 -14,645 -5.33 25,791 11.74 0.0947
2023-11-02 2023-09-30 13F AMPHENOL CORP CL A 032095101 274,821 -11,374 -3.97 23,082 -5.06 0.0921
2023-08-09 2023-06-30 13F AMPHENOL CORP CL A 032095101 286,195 -18,859 -6.18 24,313 -2.48 0.0908
2023-05-11 2023-03-31 13F AMPHENOL CORP CL A 032095101 305,054 16,495 5.72 24,930 13.47 0.0965
2023-02-13 2022-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 288,559 -12,510 -4.16 21,971 8.98 0.0884
2023-02-13 2022-12-31 13F AMKOR TECHNOLOGY COM 032095101 295,723 -5,346 22,045 0.0887
2022-11-17 2022-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 301,069 -7,820 -2.53 20,160 3.53 0.0896
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 301,069 -7,820 20,159 0.0172
2022-08-05 2022-06-30 13F AMPHENOL CORP CL A 032095101 308,889 7,019 2.33 19,472 -14.39 0.0917
2022-05-09 2022-03-31 13F AMPHENOL CORP CL A 032095101 301,870 -29,832 -8.99 22,744 -21.60 0.1005
2022-02-07 2021-12-31 13F AMPHENOL CORP CL A 032095101 331,702 17,357 5.52 29,012 26.02 0.1219
2021-10-28 2021-09-30 13F AMPHENOL CORP CL A 032095101 314,345 32,382 11.48 23,021 19.34 0.1037
2021-08-13 2021-06-30 13F AMPHENOL CORP CL A 032095101 281,963 21,073 8.08 19,290 12.08 0.0847
2021-05-06 2021-03-31 13F AMPHENOL CORP CL A 032095101 260,890 133,418 104.66 17,211 3.25 0.0743
2021-02-12 2020-12-31 13F AMPHENOL CORP CL A 032095101 127,472 6,228 5.14 16,669 26.97 0.0731
2020-11-06 2020-09-30 13F AMPHENOL CORP CL A 032095101 121,244 8,332 7.38 13,128 21.33 0.0644
2020-07-29 2020-06-30 13F AMPHENOL CORP CL A 032095101 112,912 25,353 28.96 10,820 69.57 0.0580
2020-05-14 2020-03-31 13F AMPHENOL CORP CL A 032095101 87,559 674 0.78 6,381 -32.15 0.0377
2020-02-07 2019-12-31 13F AMPHENOL CORP CL A 032095101 86,885 -244 -0.28 9,404 11.83 0.0442
2019-11-12 2019-09-30 13F AMPHENOL CORP CL A 032095101 87,129 11,566 15.31 8,409 15.97 0.0420
2019-08-12 2019-06-30 13F AMPHENOL CORP CL A 032095101 75,563 10,305 15.79 7,251 17.62 0.0379
2019-05-15 2019-03-31 13F AMPHENOL CORP CL A 032095101 65,258 5,744 9.65 6,165 27.83 0.0322
2019-02-01 2018-12-31 13F AMPHENOL CORP CL A 032095101 59,514 6,840 12.99 4,823 -2.61 0.0277
2018-11-09 2018-09-30 13F AMPHENOL CORP CL A 032095101 52,674 4,913 10.29 4,952 18.98 0.0248
2018-08-10 2018-06-30 13F AMPHENOL CORP CL A 032095101 47,761 1,911 4.17 4,162 5.39 0.0224
2018-05-04 2018-03-31 13F AMPHENOL CORP CL A 032095101 45,850 -5,768 -11.17 3,949 -12.84 0.0212
2018-02-06 2017-12-31 13F AMPHENOL CORP CL A 032095101 51,618 -7,264 -12.34 4,531 -9.11 0.0237
2017-11-13 2017-09-30 13F AMPHENOL CORP CL A 032095101 58,882 1,767 3.09 4,985 18.21 0.0270
2017-08-11 2017-06-30 13F AMPHENOL CORP CL A 032095101 57,115 -3,274 -5.42 4,217 -1.88 0.0249
2017-05-10 2017-03-31 13F AMPHENOL CORP CL A 032095101 60,389 -457 -0.75 4,298 5.11 0.0260
2017-02-14 2016-12-31 13F AMPHENOL CORP CL A 032095101 60,846 1,152 1.93 4,089 5.50 0.0255
2016-11-04 2016-09-30 13F AMPHENOL CORP CL A 032095101 59,694 -11,574 -16.24 3,876 -5.14 0.0247
2016-08-04 2016-06-30 13F AMPHENOL CORP CL A 032095101 71,268 10,411 17.11 4,086 16.15 0.0275
2016-05-11 2016-03-31 13F AMPHENOL CORP CL A 032095101 60,857 33,768 124.66 3,518 148.62 0.0238
2016-02-12 2015-12-31 13F AMPHENOL CORP CL A 032095101 27,089 3,010 12.50 1,415 15.32 0.0094
2015-11-13 2015-09-30 13F AMPHENOL CORP CL A 032095101 24,079 -404 -1.65 1,227 -13.53 0.0084
2015-08-14 2015-06-30 13F AMPHENOL CORP CL A 032095101 24,483 -719 -2.85 1,419 -4.44 0.0086
2015-05-14 2015-03-31 13F AMPHENOL CORP CL A 032095101 25,202 -8,256 -24.68 1,485 -17.55 0.0093
2015-02-12 2014-12-31 13F AMPHENOL CORP CL A 032095101 33,458 17,297 107.03 1,801 11.66 0.0113
2014-11-14 2014-09-30 13F AMPHENOL CORP CL A 032095101 16,161 16,161 1,613 0.0113
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.