Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionMacquarie Group Ltd
Latest Disclosed Ownership616,949 shares
Latest Disclosed Value $ 77,951,506
Macquarie Group Ltd reports 24.35% decrease in ownership of APH / Amphenol Corporation

On May 15, 2026 - Macquarie Group Ltd filed a 13F-HR form disclosing ownership of 616,949 shares of Amphenol Corporation (US:APH) valued at $77,951,506 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 815,545 shares of Amphenol Corporation. This represents a change in shares of -24.35% during the quarter. The current value of the position is $91,074,011 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)
2026-05-15 2026-03-31 13F AMPHENOL CL A 032095101 616,949 -198,596 -24.35 77,952 -29.27 0.3630
2026-02-13 2025-12-31 13F AMPHENOL CORP CL A 032095101 815,545 -590,059 -41.98 110,213 -36.64 0.4817
2025-11-13 2025-09-30 13F AMPHENOL CORP CL A 032095101 1,405,604 1,028,175 272.42 173,943 366.71 0.2030
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A 032095101 377,429 -31,619 -7.73 37,271 38.92 0.0457
2025-08-14 2025-03-31 13F/A-1 AMPHENOL CORP CL A 032095101 409,048 158,189 63.06 26,829 89.27 0.0333
2025-05-15 2025-03-31 13F AMPHENOL CORP CL A 032095101 409,048 158,189 22,351 0.0183
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 250,859 119,602 91.12 14,175 65.75 0.0172
2024-11-14 2024-09-30 13F AMPHENOL CORP CL A 032095101 131,257 482 0.37 8,553 -2.93 0.0092
2024-08-09 2024-06-30 13F AMPHENOL CORP CL A 032095101 130,775 87,573 202.71 8,810 77.05 0.0101
2024-05-14 2024-03-31 13F AMPHENOL CORP CL A 032095101 43,202 -262 -0.60 4,977 15.51 0.0056
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A 032095101 43,464 9,395 27.58 4,308 50.58 0.0050
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 34,069 3,382 11.02 2,862 9.79 0.0036
2023-10-27 2023-06-30 13F/A-2 AMPHENOL CORP CL A 032095101 30,687 -257,819 -89.36 2,607 -88.95 0.0030
2023-10-12 2023-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 30,687 -257,819 2,607 0.0026
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A 032095101 30,687 -257,819 2,607 0.0026
2023-06-01 2023-03-31 13F/A-1 AMPHENOL CORP CL A 032095101 288,506 -2,128,087 -88.06 23,577 -87.19 0.0280
2023-05-15 2023-03-31 13F AMPHENOL CORP CL A 032095101 288,506 -2,128,087 23,577 0.0216
2023-02-21 2022-12-31 13F AMPHENOL CORP CL A 032095101 2,416,593 -370,136 -13.28 184,000 -1.39 0.2173
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 2,786,729 -161,030 -5.46 186,599 -1.67 0.2289
2022-08-17 2022-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 2,947,759 -198 -0.01 189,777 -14.56 0.2131
2022-08-15 2022-06-30 13F AMPHENOL CORP CL A 032095101 2,947,759 -198 189,777 0.0680
2022-05-16 2022-03-31 13F AMPHENOL CORP CL A 032095101 2,947,957 8,632 0.29 222,128 -13.59 0.1689
2022-02-11 2021-12-31 13F Amphenol CL A 032095101 2,939,325 -19,149 -0.65 257,073 18.66 0.2142
2021-11-12 2021-09-30 13F AMPHENOL CORP CL A 032095101 2,958,474 2,908,392 5,807.26 216,649 6,223.67 0.1846
2021-08-13 2021-06-30 13F AMPHENOL CORP CL A 032095101 50,082 2,749 5.81 3,426 9.74 0.0028
2021-05-14 2021-03-31 13F AMPHENOL CORP CL A 032095101 47,333 25,143 113.31 3,122 7.62 0.0044
2021-02-16 2020-12-31 13F AMPHENOL CORP CL A 032095101 22,190 -3,125 -12.34 2,901 5.84 0.0042
2020-11-13 2020-09-30 13F AMPHENOL CORP CL A 032095101 25,315 13,104 107.31 2,741 134.27 0.0046
2020-08-11 2020-06-30 13F AMPHENOL CORP CL A 032095101 12,211 500 4.27 1,170 37.16 0.0020
2020-05-15 2020-03-31 13F AMPHENOL CORP CL A 032095101 11,711 300 2.63 853 -30.93 0.0018
2020-03-18 2019-12-31 13F/A-2 AMPHENOL CORP CL A 032095101 11,411 1,670 17.14 1,235 31.38 0.0018
2020-02-28 2019-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 11,411 0 1,235 0.0018
2020-02-14 2019-12-31 13F AMPHENOL CORP CL A 032095101 11,411 1,670 1,235 1,549.8203
2019-11-14 2019-09-30 13F AMPHENOL CORP CL A 032095101 9,741 41 0.42 940 1.08 0.0016
2019-11-06 2019-06-30 13F/A-2 AMPHENOL CORP CL A 032095101 9,700 -287 -2.87 930 -1.38 0.0016
2019-09-24 2019-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 9,700 0 930 0.0016
2019-08-14 2019-06-30 13F AMPHENOL CORP CL A 032095101 9,700 -287 930
2019-05-15 2019-03-31 13F AMPHENOL CORP CL A 032095101 9,987 -800 -7.42 943 7.89 0.0016
2019-02-15 2018-12-31 13F AMPHENOL CORP CL A 032095101 10,787 -146 -1.34 874 -14.98 0.0017
2018-11-15 2018-09-30 13F AMPHENOL CORP CL A 032095101 10,933 -1,000 -8.38 1,028 -1.15 0.0017
2019-03-21 2018-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 11,933 -500 -4.02 1,040 -2.89 0.0018
2018-08-14 2018-06-30 13F ANALOG DEVICES COM 032095101 11,933 -500 1,040
2018-05-11 2018-03-31 13F AMPHENOL CORP CL A 032095101 12,433 -900 -6.75 1,071 -11.71 0.0020
2018-02-14 2017-12-31 13F AMPHENOL CORP CL A 032095101 13,333 -567 -4.08 1,213 3.15 0.0021
2017-11-08 2017-09-30 13F AMPHENOL CORP CL A 032095101 13,900 0 0.00 1,176 14.62 0.0021
2017-08-14 2017-06-30 13F AMPHENOL CORP CL A 032095101 13,900 -1,200 -7.95 1,026 -4.56 0.0019
2017-05-15 2017-03-31 13F Amphenol COM 032095101 15,100 -1,200 -7.36 1,075 -1.83 0.0020
2017-03-30 2016-12-31 13F/A-1 Amphenol Common Stock 032095101 16,300 6,500 66.33 1,095 72.17 0.0021
2017-02-15 2016-12-31 13F Amphenol Common Stock 032095101 16,300 1,095
2016-11-15 2016-09-30 13F Amphenol Common Stock 032095101 9,800 -42,734 -81.35 636 -78.88 0.0012
2016-09-14 2016-06-30 13F/A-1 Amphenol Common Stock 032095101 52,534 1,643 3.23 3,012 2.38 0.0059
2016-08-15 2016-06-30 13F Amphenol Common Stock 032095101 52,534 3,012
2016-05-16 2016-03-31 13F Amphenol Common Stock 032095101 50,891 45,891 917.82 2,942 1,027.20 0.0059
2016-02-16 2015-12-31 13F Amphenol Common Stock 032095101 5,000 0 0.00 261 2.35 0.0005
2015-11-16 2015-09-30 13F Amphenol Common Stock 032095101 5,000 -39,800 -88.84 255 -90.18 0.0005
2015-08-21 2015-06-30 13F/A-1 Amphenol Common Stock 032095101 44,800 -17,000 -27.51 2,597 -28.69 0.0051
2015-08-14 2015-06-30 13F Amphenol Common Stock 032095101 44,800 2,597
2015-05-18 2015-03-31 13F Amphenol Common Stock 032095101 61,800 0 0.00 3,642 9.53 0.0071
2015-02-17 2014-12-31 13F Amphenol Common Stock 032095101 61,800 30,900 100.00 3,325 12.29 0.0069
2014-11-14 2014-09-30 13F Amphenol Common Stock 032095101 30,900 0 0.00 2,961 -0.54 0.0064
2014-08-14 2014-06-30 13F AMPHENOL COMMON 032095101 30,900 -500 -1.59 2,977 3.44 0.0066
2014-05-15 2014-03-31 13F Amphenol Common Stock 032095101 31,400 0 0.00 2,878 2.75 0.0050
2014-02-14 2013-12-31 13F Amphenol Common Stock 032095101 31,400 1,300 4.32 2,801 20.21 0.0050
2013-11-14 2013-09-30 13F AMPHENOL Common Stock 032095101 30,100 0 0.00 2,330 -0.64 0.0046
2013-08-16 2013-06-30 13F/A-1 AMPHENOL COMMON 032095101 30,100 30,100 2,345 0.0051
2013-08-14 2013-06-30 13F AMPHENOL COMMON 032095101 30,100 2,345 0.0051
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.