安費諾公司
MX ˙ BMV ˙ US0320951017
SecurityMX:APH / Amphenol Corporation
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership1,187,029 shares
Latest Disclosed Value $ 149,981,114
Baird Financial Group, Inc. reports 1.97% increase in ownership of APH / Amphenol Corporation

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 1,187,029 shares of Amphenol Corporation (MX:APH) valued at $149,981,114 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,164,126 shares of Amphenol Corporation. This represents a change in shares of 1.97% during the quarter.

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)
2026-05-14 2026-03-31 13F AMPHENOL CL A 032095101 1,187,029 22,903 1.97 149,981 -4.66 0.1261
2026-02-13 2025-12-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 1,164,126 24,626 2.16 157,320 11.56 0.2452
2025-11-13 2025-09-30 13F AMPHENOL CORP CL A COMMON 032095101 1,139,500 86,968 8.26 141,013 35.67 0.2268
2025-08-13 2025-06-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 1,052,532 64,252 6.50 103,938 60.34 0.1822
2025-05-15 2025-03-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 988,280 261,691 36.02 64,821 28.46 0.1248
2025-02-14 2024-12-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 726,589 8,294 1.15 50,462 7.81 0.0965
2024-11-14 2024-09-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 718,295 -16,306 -2.22 46,804 -5.43 0.0909
2024-08-14 2024-06-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 734,601 331,942 82.44 49,490 6.55 0.1027
2024-05-14 2024-03-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 402,659 -12,913 -3.11 46,447 12.75 0.0974
2024-02-14 2023-12-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 415,572 128,785 44.91 41,196 71.03 0.0939
2023-11-13 2023-09-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 286,787 106,059 58.68 24,087 56.90 0.0657
2023-08-11 2023-06-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 180,728 47,629 35.78 15,353 41.15 0.0405
2023-05-15 2023-03-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 133,099 4,714 3.67 10,877 120,744.44 0.0268
2023-02-13 2022-12-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 128,385 12,174 10.48 10 -99.88 0.0257
2022-11-15 2022-09-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 116,211 565 0.49 7,781 4.50 0.0229
2022-08-08 2022-06-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 115,646 3,108 2.76 7,446 -12.19 0.0207
2022-05-13 2022-03-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 112,538 5,525 5.16 8,480 -9.39 0.0210
2022-02-09 2021-12-31 13F AMPHENOL CORP CL A COMMON 032095101 107,013 82,878 343.39 9,359 429.36 0.0219
2021-11-12 2021-09-30 13F AMPHENOL CORP CL A COMMON 032095101 24,135 2,333 10.70 1,768 18.58 0.0045
2021-08-11 2021-06-30 13F AMPHENOL CORP CL A COMMON 032095101 21,802 0 0.00 1,491 3.69 0.0039
2021-05-13 2021-03-31 13F AMPHENOL CORP CL A COMMON 032095101 21,802 18,391 539.17 1,438 222.42 0.0040
2021-02-11 2020-12-31 13F AMPHENOL CORP CL A COMMON 032095101 3,411 -78 -2.24 446 18.30 0.0013
2020-11-12 2020-09-30 13F AMPHENOL CORP CL A COMMON 032095101 3,489 3,489 377 0.0013
2016-05-12 2016-03-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 0 -16,348 -100.00 0 -100.00
2016-02-11 2015-12-31 13F AMPHENOL CORP NEW CL A COMMON 032095101 16,348 -3,598 -18.04 854 -15.94 0.0085
2015-11-12 2015-09-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 19,946 -26,272 -56.84 1,016 -62.08 0.0108
2015-08-14 2015-06-30 13F AMPHENOL CORP NEW CL A COMMON 032095101 46,218 46,218 2,679 0.0264
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.