Amphenol Corporation
MX ˙ BMV ˙ US0320951017
SecurityMX:APH / Amphenol Corporation
InstitutionGuardian Capital Lp
Latest Disclosed Ownership129,747 shares
Latest Disclosed Value $ 16,393,534
Guardian Capital Lp reports 563.77% increase in ownership of APH / Amphenol Corporation

On May 15, 2026 - Guardian Capital Lp filed a 13F-HR form disclosing ownership of 129,747 shares of Amphenol Corporation (MX:APH) valued at $16,393,534 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 19,547 shares of Amphenol Corporation. This represents a change in shares of 563.77% 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)
2026-05-15 2026-03-31 13F AMPHENOL CL A 032095101 129,747 110,200 563.77 16,394 520.71 0.2858
2026-02-18 2025-12-31 13F AMPHENOL CORP CL A 032095101 19,547 2,194 12.64 2,642 23.01 0.0783
2025-11-12 2025-09-30 13F AMPHENOL CORP CL A 032095101 17,353 3,934 29.32 2,147 62.04 0.0693
2025-08-07 2025-06-30 13F AMPHENOL CORP CL A 032095101 13,419 -111 -0.82 1,325 49.38 0.0468
2025-05-14 2025-03-31 13F AMPHENOL CORP CL A 032095101 13,530 274 2.07 887 -3.59 0.0349
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 13,256 744 5.95 921 12.88 0.0342
2024-11-12 2024-09-30 13F AMPHENOL CORP CL A 032095101 12,512 12,512 815 0.0299
2024-08-13 2024-06-30 13F AMPHENOL CORP CL A 032095101 0 -16,225 -100.00 0 -100.00
2024-05-14 2024-03-31 13F AMPHENOL CORP CL A 032095101 16,225 -160 -0.98 1,872 15.21 0.0652
2024-02-08 2023-12-31 13F AMPHENOL CORP CL A 032095101 16,385 -170 -1.03 1,624 16.83 0.0582
2023-11-13 2023-09-30 13F AMPHENOL CORP CL A 032095101 16,555 -1,500 -8.31 1,390 -9.33 0.0517
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A 032095101 18,055 3,300 22.37 1,534 27.22 0.0491
2023-05-15 2023-03-31 13F AMPHENOL CORP CL A 032095101 14,755 1,915 14.91 1,206 23.34 0.0384
2023-02-14 2022-12-31 13F AMPHENOL CORP CL A 032095101 12,840 -2,925 -18.55 978 -7.48 0.0322
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 15,765 -220 -1.38 1,056 2.62 0.0363
2022-08-12 2022-06-30 13F AMPHENOL CORP CL A 032095101 15,985 1,145 7.72 1,029 -7.96 0.0315
2022-05-16 2022-03-31 13F AMPHENOL CORP CL A 032095101 14,840 945 6.80 1,118 -7.98 0.0217
2022-02-10 2021-12-31 13F AMPHENOL CORP CL A 032095101 13,895 0 0.00 1,215 19.35 0.0234
2021-11-15 2021-09-30 13F AMPHENOL CORP CL A 032095101 13,895 0 0.00 1,018 7.05 0.0211
2021-08-17 2021-06-30 13F AMPHENOL CORP CL A 032095101 13,895 -655 -4.50 951 -0.94 0.0187
2021-05-17 2021-03-31 13F AMPHENOL CORP CL A 032095101 14,550 6,490 80.52 960 -8.92 0.0161
2021-02-12 2020-12-31 13F AMPHENOL CORP CL A 032095101 8,060 320 4.13 1,054 25.78 0.0246
2020-11-16 2020-09-30 13F AMPHENOL CORP CL A 032095101 7,740 -1,080 -12.24 838 -0.83 0.0220
2020-08-13 2020-06-30 13F AMPHENOL CORP CL A 032095101 8,820 3,470 64.86 845 116.67 0.0219
2020-05-15 2020-03-31 13F AMPHENOL CORP CL A 032095101 5,350 0 0.00 390 -32.64 0.0116
2020-02-13 2019-12-31 13F AMPHENOL CORP CL A 032095101 5,350 0 0.00 579 12.21 0.0120
2019-11-14 2019-09-30 13F AMPHENOL CORP CL A 032095101 5,350 0 0.00 516 0.58 0.0103
2019-08-14 2019-06-30 13F AMPHENOL CORP CL A 032095101 5,350 1,150 27.38 513 29.22 0.0100
2019-05-15 2019-03-31 13F AMPHENOL CORP CL A 032095101 4,200 -225 -5.08 397 10.58 0.0073
2019-02-13 2018-12-31 13F AMPHENOL CORP CL A 032095101 4,425 4,425 359 0.0075
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.