Amphenol Corporation
IT ˙ BIT ˙ US0320951017
122,50 € ↓ -7,00 (-5,41%)
2026-06-04
DEL PRIS
SecurityIT:1APH / Amphenol Corporation
InstitutionTcw Group Inc
Latest Disclosed Ownership204,115 shares
Latest Disclosed Value $ 25,789,931
Tcw Group Inc reports 7.48% decrease in ownership of 1APH / Amphenol Corporation

On May 14, 2026 - Tcw Group Inc filed a 13F-HR form disclosing ownership of 204,115 shares of Amphenol Corporation (IT:1APH) valued at $22,746,576 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 220,615 shares of Amphenol Corporation. This represents a change in shares of -7.48% during the quarter. The current value of the position is $25,004,088 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)
2026-05-14 2026-03-31 13F AMPHENOL CL A 032095101 204,115 -16,500 -7.48 25,790 -13.50 0.1940
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A 032095101 220,615 -28,112 -11.30 29,814 -3.14 0.2136
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A 032095101 248,727 -19,075 -7.12 30,780 16.39 0.2577
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A 032095101 267,802 380 0.14 26,445 50.77 0.2072
2025-05-07 2025-03-31 13F AMPHENOL CORP CL A 032095101 267,422 -7,010 -2.55 17,540 -7.97 0.1570
2025-02-04 2024-12-31 13F AMPHENOL CORP CL A 032095101 274,432 547 0.20 19,059 6.80 0.1600
2024-11-19 2024-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 273,885 -390 -0.14 17,846 -3.42 0.1560
2024-11-08 2024-09-30 13F AMPHENOL CORP CL A 032095101 273,885 -390 17,846 0.0802
2024-07-19 2024-06-30 13F AMPHENOL CORP CL A 032095101 274,275 137,689 100.81 18,478 17.28 0.1652
2024-05-10 2024-03-31 13F AMPHENOL CORP CL A 032095101 136,586 -1,347 -0.98 15,755 15.20 0.1595
2024-02-09 2023-12-31 13F AMPHENOL CORP CL A 032095101 137,933 41,058 42.38 13,676 68.09 0.1524
2023-11-15 2023-09-30 13F AMPHENOL CORP CL A 032095101 96,875 0 0.00 8,137 -1.13 0.1022
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A 032095101 96,875 -240 -0.25 8,230 3.69 0.0913
2023-05-15 2023-03-31 13F AMPHENOL CORP CL A 032095101 97,115 -154 -0.16 7,936 7.16 0.1015
2023-02-14 2022-12-31 13F AMPHENOL CORP CL A 032095101 97,269 -7,057 -6.76 7,406 6.01 0.1060
2022-10-27 2022-09-30 13F AMPHENOL CORP CL A 032095101 104,326 0 0.00 6,986 4.00 0.1022
2022-07-19 2022-06-30 13F AMPHENOL CORP CL A 032095101 104,326 7,057 7.26 6,717 -8.35 0.0879
2022-04-19 2022-03-31 13F AMPHENOL CORP CL A 032095101 97,269 -802 -0.82 7,329 -14.56 0.0699
2022-01-26 2021-12-31 13F AMPHENOL CORP CL A 032095101 98,071 21,225 27.62 8,578 52.44 0.0705
2021-10-26 2021-09-30 13F AMPHENOL CORP CL A 032095101 76,846 0 0.00 5,627 7.02 0.0145
2021-07-23 2021-06-30 13F AMPHENOL CORP CL A 032095101 76,846 -13,354 -14.80 5,258 -11.63 0.0456
2021-05-05 2021-03-31 13F AMPHENOL CORP CL A 032095101 90,200 45,100 100.00 5,950 0.88 0.0570
2021-02-02 2020-12-31 13F AMPHENOL CORP CL A 032095101 45,100 -181 -0.40 5,898 20.32 0.0513
2020-10-30 2020-09-30 13F AMPHENOL CORP CL A 032095101 45,281 20,485 82.61 4,902 106.31 0.0535
2020-08-05 2020-06-30 13F AMPHENOL CORP CL A 032095101 24,796 6,570 36.05 2,376 78.92 0.0277
2020-05-05 2020-03-31 13F AMPHENOL CORP CL A 032095101 18,226 119 0.66 1,328 -32.21 0.0184
2020-02-10 2019-12-31 13F AMPHENOL CORP CL A 032095101 18,107 0 0.00 1,959 12.14 0.0217
2019-11-13 2019-09-30 13F AMPHENOL CORP CL A 032095101 18,107 0 0.00 1,747 0.58 0.0199
2019-08-07 2019-06-30 13F AMPHENOL CORP CL A 032095101 18,107 -104 -0.57 1,737 0.99 0.0185
2019-05-13 2019-03-31 13F AMPHENOL CORP CL A 032095101 18,211 106 0.59 1,720 17.25 0.0165
2019-02-11 2018-12-31 13F AMPHENOL CORP CL A 032095101 18,105 18,105 1,467 0.0152
2017-05-11 2017-03-31 13F AMPHENOL CORP CL A 032095101 0 -22,750 -100.00 0 -100.00
2017-02-10 2016-12-31 13F AMPHENOL CORP CL A 032095101 22,750 -50 -0.22 1,529 3.31 0.0115
2016-11-14 2016-09-30 13F AMPHENOL CORP CL A 032095101 22,800 -1,975 -7.97 1,480 4.23 0.0112
2016-08-12 2016-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 24,775 850 3.55 1,420 2.68 0.0107
2016-08-11 2016-06-30 13F AMPHENOL CORP CL A 032095101 24,775 1,420
2016-05-16 2016-03-31 13F AMPHENOL CORP CL A 032095101 23,925 225 0.95 1,383 11.71 0.0101
2016-02-16 2015-12-31 13F AMPHENOL CORP CL A 032095101 23,700 250 1.07 1,238 3.60 0.0089
2015-11-13 2015-09-30 13F AMPHENOL CORP CL A 032095101 23,450 0 0.00 1,195 -12.07 0.0086
2015-08-12 2015-06-30 13F AMPHENOL CORP CL A 032095101 23,450 -66,700 -73.99 1,359 -74.42 0.0088
2015-05-13 2015-03-31 13F AMPHENOL CORP CL A 032095101 90,150 3,600 4.16 5,313 14.09 0.0255
2015-02-13 2014-12-31 13F AMPHENOL CORP CL A 032095101 86,550 9,700 12.62 4,657 -39.31 0.0195
2014-11-14 2014-09-30 13F AMPHENOL CORP CL A 032095101 76,850 -1,850 -2.35 7,674 1.21 0.0309
2014-08-14 2014-06-30 13F AMPHENOL CORP CL A 032095101 78,700 100 0.13 7,582 5.25 0.0312
2014-05-13 2014-03-31 13F AMPHENOL CORP CL A 032095101 78,600 350 0.45 7,204 3.24 0.0299
2014-02-18 2013-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 78,250 -350 -0.45 6,978 14.73 0.0294
2014-02-14 2013-12-31 13F AMPHENOL CORP CL A 032095101 6,978 78,250
2013-11-14 2013-09-30 13F AMPHENOL CORP CL A 032095101 78,600 250 0.32 6,082 -0.41 0.0281
2013-08-14 2013-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 78,350 78,350 6,107 0.0301
2013-08-14 2013-06-30 13F AMPHENOL CORP CL A 032095101 78,350 6,107
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.