Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionNissay Asset Management Corp /japan/ /adv
Latest Disclosed Ownership810,812 shares
Latest Disclosed Value $ 102,446,096
Nissay Asset Management Corp /japan/ /adv reports 28.87% decrease in ownership of APH / Amphenol Corporation

On May 15, 2026 - Nissay Asset Management Corp /japan/ /adv filed a 13F-HR form disclosing ownership of 810,812 shares of Amphenol Corporation (US:APH) valued at $102,446,096 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,139,882 shares of Amphenol Corporation. This represents a change in shares of -28.87% during the quarter. The current value of the position is $112,548,814 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 810,812 -329,070 -28.87 102,446 -33.50 0.5429
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A 032095101 1,139,882 -202,014 -15.05 154,044 -7.24 0.8012
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A 032095101 1,341,896 591,345 78.79 166,060 124.05 0.9171
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A 032095101 750,551 24,595 3.39 74,117 55.66 0.4338
2025-05-15 2025-03-31 13F AMPHENOL CORP CL A 032095101 725,956 129,246 21.66 47,615 12.80 0.3095
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 596,710 5,665 0.96 42,211 9.60 0.2574
2024-11-14 2024-09-30 13F AMPHENOL CORP CL A 032095101 591,045 3,854 0.66 38,512 -2.65 0.2439
2024-08-14 2024-06-30 13F AMPHENOL CORP CL A 032095101 587,191 280,435 91.42 39,559 11.80 0.2619
2024-05-15 2024-03-31 13F AMPHENOL CORP CL A 032095101 306,756 -6,400 -2.04 35,384 13.98 0.2452
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A 032095101 313,156 17,089 5.77 31,043 24.84 0.2497
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 296,067 -9,066 -2.97 24,867 -4.07 0.2204
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A 032095101 305,133 -28,116 -8.44 25,921 -4.82 0.2236
2023-05-15 2023-03-31 13F AMPHENOL CORP CL A 032095101 333,249 -13,200 -3.81 27,233 3.24 0.2433
2023-02-14 2022-12-31 13F AMPHENOL CORP CL A 032095101 346,449 -15,891 -4.39 26,379 8.72 0.2521
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 362,340 -3,382 -0.92 24,262 3.05 0.2548
2022-08-15 2022-06-30 13F AMPHENOL CORP CL A 032095101 365,722 18,470 5.32 23,545 -10.01 0.2344
2022-05-16 2022-03-31 13F AMPHENOL CORP CL A 032095101 347,252 17,810 5.41 26,165 -9.19 0.2279
2022-02-14 2021-12-31 13F AMPHENOL CORP CL A 032095101 329,442 44,457 15.60 28,813 38.07 0.2207
2021-11-10 2021-09-30 13F AMPHENOL CORP CL A 032095101 284,985 15,958 5.93 20,869 13.39 0.1769
2021-08-13 2021-06-30 13F AMPHENOL CORP CL A 032095101 269,027 -35,265 -11.59 18,404 -8.32 0.1616
2021-05-11 2021-03-31 13F AMPHENOL CORP CL A 032095101 304,292 131,624 76.23 20,074 -11.10 0.1979
2021-02-08 2020-12-31 13F AMPHENOL CORP CL A 032095101 172,668 -24,094 -12.25 22,580 5.99 0.3395
2020-10-20 2020-09-30 13F AMPHENOL CORP CL A 032095101 196,762 35,763 22.21 21,303 38.11 0.3599
2020-07-27 2020-06-30 13F AMPHENOL CORP CL A 032095101 160,999 7,187 4.67 15,425 37.60 0.2994
2020-05-05 2020-03-31 13F AMPHENOL CORP CL A 032095101 153,812 40,363 35.58 11,210 -8.71 0.2854
2020-02-14 2019-12-31 13F AMPHENOL CORP CL A 032095101 113,449 11,753 11.56 12,279 25.12 0.2729
2019-11-14 2019-09-30 13F AMPHENOL CORP CL A 032095101 101,696 4,484 4.61 9,814 5.22 0.2429
2019-08-07 2019-06-30 13F AMPHENOL CORP CL A 032095101 97,212 8,671 9.79 9,327 11.54 0.2358
2019-05-03 2019-03-31 13F AMPHENOL CORP CL A 032095101 88,541 22,739 34.56 8,362 56.86 0.2209
2019-02-06 2018-12-31 13F AMPHENOL CORP CL A 032095101 65,802 18,386 38.78 5,331 19.58 0.1625
2018-10-30 2018-09-30 13F AMPHENOL CORP CL A 032095101 47,416 397 0.84 4,458 8.78 0.1200
2018-08-08 2018-06-30 13F AMPHENOL CORP CL A 032095101 47,019 -2,554 -5.15 4,098 -4.03 0.1199
2018-05-14 2018-03-31 13F AMPHENOL CORP CL A 032095101 49,573 187 0.38 4,270 -1.52 0.1334
2018-02-14 2017-12-31 13F AMPHENOL CORP CL A 032095101 49,386 49,386 4,336 0.1320
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.