Amphenol Corporation
MX ˙ BMV ˙ US0320951017
SecurityMX:APH / Amphenol Corporation
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership43,001 shares
Latest Disclosed Value $ 5,433,187
Quadrant Capital Group Llc reports 0.62% decrease in ownership of APH / Amphenol Corporation

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 43,001 shares of Amphenol Corporation (MX:APH) valued at $5,433,187 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 43,269 shares of Amphenol Corporation. This represents a change in shares of -0.62% 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)
2026-05-13 2026-03-31 13F/A-1 AMPHENOL CL A 032095101 43,001 -268 -0.62 5,433 -7.08 0.1624
2026-05-11 2026-03-31 13F AMPHENOL CL A 032095101 43,001 -268 49 0.0369
2026-02-12 2025-12-31 13F AMPHENOL CORP CL A 032095101 43,269 1,169 2.78 5,847 12.25 0.1767
2025-11-13 2025-09-30 13F AMPHENOL CORP CL A 032095101 42,100 768 1.86 5,210 27.64 0.1694
2025-08-13 2025-06-30 13F AMPHENOL CORP CL A 032095101 41,332 -1,768 -4.10 4,082 44.41 0.1469
2025-05-13 2025-03-31 13F AMPHENOL CORP CL A 032095101 43,100 17,283 66.94 2,827 57.70 0.1050
2025-02-13 2024-12-31 13F AMPHENOL CORP CL A 032095101 25,817 -1,223 -4.52 1,793 1.76 0.1234
2024-11-12 2024-09-30 13F AMPHENOL CORP CL A 032095101 27,040 1,243 4.82 1,762 1.38 0.1224
2024-08-12 2024-06-30 13F AMPHENOL CORP CL A 032095101 25,797 14,141 121.32 1,738 29.24 0.1290
2024-05-15 2024-03-31 13F AMPHENOL CORP CL A 032095101 11,656 -214 -1.80 1,345 14.29 0.1062
2024-02-08 2023-12-31 13F AMPHENOL CORP CL A 032095101 11,870 -138 -1.15 1,177 16.67 0.1011
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 12,008 688 6.08 1,009 4.89 0.1010
2023-08-10 2023-06-30 13F AMPHENOL CORP CL A 032095101 11,320 -1,850 -14.05 962 -10.69 0.0954
2023-05-11 2023-03-31 13F AMPHENOL CORP CL A 032095101 13,170 68 0.52 1,076 7.92 0.1121
2023-02-13 2022-12-31 13F AMPHENOL CORP CL A 032095101 13,102 2,818 27.40 998 44.70 0.1131
2022-11-10 2022-09-30 13F AMPHENOL CORP CL A 032095101 10,284 962 10.32 689 14.83 0.0911
2022-08-09 2022-06-30 13F AMPHENOL CORP CL A 032095101 9,322 -579 -5.85 600 -19.57 0.0806
2022-05-06 2022-03-31 13F AMPHENOL CORP CL A 032095101 9,901 366 3.84 746 -10.55 0.0903
2022-02-01 2021-12-31 13F AMPHENOL CORP CL A 032095101 9,535 2,398 33.60 834 59.46 0.0995
2021-11-12 2021-09-30 13F AMPHENOL CORP CL A 032095101 7,137 295 4.31 523 11.75 0.0730
2021-08-09 2021-06-30 13F AMPHENOL CORP CL A 032095101 6,842 274 4.17 468 8.08 0.0679
2021-05-12 2021-03-31 13F AMPHENOL CORP CL A 032095101 6,568 3,534 116.48 433 9.07 0.0703
2021-02-16 2020-12-31 13F AMPHENOL CORP CL A 032095101 3,034 39 1.30 397 22.53 0.0737
2020-11-13 2020-09-30 13F AMPHENOL CORP CL A 032095101 2,995 271 9.95 324 24.14 0.0706
2020-08-13 2020-06-30 13F AMPHENOL CORP CL A 032095101 2,724 -4,000 -59.49 261 -46.63 0.0578
2020-05-15 2020-03-31 13F Amphenol Corp Com 032095101 6,724 3,654 119.02 489 53.77 0.0819
2020-03-19 2019-12-31 13F/A-1 Amphenol Corp Com 032095101 3,070 255 9.06 318 21.37 0.0383
2020-02-03 2019-12-31 13F Amphenol Corp Com 032095101 3,070 255 318 1,074.5635
2019-10-24 2019-09-30 13F Amphenol Corp COM 032095101 2,815 -883 -23.88 262 -23.84 0.0403
2019-07-24 2019-06-30 13F Amphenol Corp COM 032095101 3,698 527 16.62 344 17.81 0.0544
2019-04-29 2019-03-31 13F Amphenol Corp COM 032095101 3,171 147 4.86 292 23.21 0.0513
2019-01-17 2018-12-31 13F AMPHENOL CORP COM 032095101 3,024 25 0.83 237 -14.13 0.0632
2018-10-29 2018-09-30 13F AMPHENOL CORP COM 032095101 2,999 0 0.00 276 8.24 0.0789
2018-08-08 2018-06-30 13F AMPHENOL CORP COM 032095101 2,999 15 0.50 255 3.24 0.0894
2018-05-10 2018-03-31 13F AMPHENOL CORP COM 032095101 2,984 76 2.61 247 -1.20 0.0896
2018-01-31 2017-12-31 13F AMPHENOL CORP CL A COM 032095101 2,908 0 0.00 250 4.60 0.0997
2017-10-13 2017-09-30 13F Amphenol Corp Cl A COM 032095101 2,908 0 0.00 239 15.46 0.0986
2017-08-14 2017-06-30 13F Amphenol Corp Cl A COM 032095101 2,908 -242 -7.68 207 -6.33 0.0915
2017-04-10 2017-03-31 13F Amphenol Corp Cl A COM 032095101 3,150 8 0.25 221 5.74 0.0971
2017-01-11 2016-12-31 13F Amphenol Corp Cl A COM 032095101 3,142 -73 -2.27 209 1.46 0.1048
2016-10-25 2016-09-30 13F Amphenol Corp Cl A COM 032095101 3,215 0 0.00 206 13.81 0.1344
2016-07-28 2016-06-30 13F Amphenol Corp Cl A COM 032095101 3,215 99 3.18 181 2.26 0.1245
2016-04-27 2016-03-31 13F Amphenol Corp Cl A COM 032095101 3,116 -397 -11.30 177 -1.67 0.1147
2016-01-28 2015-12-31 13F Amphenol Corp Cl A COM 032095101 3,513 -171 -4.64 180 -3.23 0.1246
2015-10-28 2015-09-30 13F Amphenol Corp Cl A COM 032095101 3,684 -22 -0.59 186 -12.68 0.1283
2015-08-12 2015-06-30 13F Amphenol Corp Cl A COM 032095101 3,706 3,706 213 0.1355
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.