Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership574,100 shares
Latest Disclosed Value $ 72,537,535
Renaissance Technologies Llc ownership in APH / Amphenol Corporation

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 574,100 shares of Amphenol Corporation (US:APH) valued at $72,537,535 USD as of March 31, 2026. The entity filed a previous 13F-HR on August 9, 2024 disclosing 0 shares of Amphenol Corporation. The current value of the position is $84,748,642 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 574,100 574,100 72,538 0.1135
2024-08-09 2024-06-30 13F AMPHENOL CORP CL A 032095101 0 -108,500 -100.00 0 -100.00
2024-05-13 2024-03-31 13F AMPHENOL CORP CL A 032095101 108,500 108,500 13 0.0197
2024-02-13 2023-12-31 13F AMPHENOL CORP CL A 032095101 0 -137,062 -100.00 0 -100.00
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 137,062 137,062 12 0.0196
2023-08-11 2023-06-30 13F AMPHENOL CORP CL A 032095101 0 -132,600 -100.00 0 -100.00
2023-05-12 2023-03-31 13F AMPHENOL CORP CL A 032095101 132,600 -130,000 -49.50 11 -47.37 0.0144
2023-02-13 2022-12-31 13F AMPHENOL CORP CL A 032095101 262,600 -601,900 -69.62 20 -99.97 0.0274
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 864,500 -1,357,600 -61.10 57,887 -59.54 0.0819
2022-08-12 2022-06-30 13F AMPHENOL CORP CL A 032095101 2,222,100 1,599,200 256.73 143,059 204.80 0.1694
2022-05-13 2022-03-31 13F AMPHENOL CORP CL A 032095101 622,900 622,900 46,936 0.0551
2021-08-13 2021-06-30 13F AMPHENOL CORP CL A 032095101 0 -328,900 -100.00 0 -100.00
2021-05-13 2021-03-31 13F AMPHENOL CORP CL A 032095101 328,900 328,900 21,698 0.0270
2020-11-13 2020-09-30 13F AMPHENOL CORP CL A 032095101 0 -19,600 -100.00 0 -100.00
2020-08-13 2020-06-30 13F AMPHENOL CORP CL A 032095101 19,600 -424,000 -95.58 1,878 -94.19 0.0016
2020-05-14 2020-03-31 13F AMPHENOL CORP CL A 032095101 443,600 401,200 946.23 32,330 604.51 0.0314
2020-02-13 2019-12-31 13F AMPHENOL CORP CL A 032095101 42,400 -35,100 -45.29 4,589 -38.64 0.0035
2019-11-13 2019-09-30 13F AMPHENOL CORP CL A 032095101 77,500 -510,900 -86.83 7,479 -86.75 0.0063
2019-08-12 2019-06-30 13F AMPHENOL CORP CL A 032095101 588,400 355,500 152.64 56,451 156.65 0.0497
2019-05-14 2019-03-31 13F AMPHENOL CORP CL A 032095101 232,900 -449,500 -65.87 21,995 -60.22 0.0200
2019-02-12 2018-12-31 13F AMPHENOL CORP CL A 032095101 682,400 682,400 55,288 0.0605
2018-11-13 2018-09-30 13F AMPHENOL CORP CL A 032095101 0 -108,227 -100.00 0 -100.00
2018-08-13 2018-06-30 13F AMPHENOL CORP CL A 032095101 108,227 0 0.00 9,322 0.00 0.0102
2018-05-14 2018-03-31 13F AMPHENOL CORP CL A 032095101 108,227 108,227 9,322 0.0102
2017-02-13 2016-12-31 13F AMPHENOL CORP CL A 032095101 0 -68,100 -100.00 0 -100.00
2016-11-14 2016-09-30 13F AMPHENOL CORP CL A 032095101 68,100 -358,000 -84.02 4,421 -81.90 0.0078
2016-08-12 2016-06-30 13F AMPHENOL CORP CL A 032095101 426,100 368,500 639.76 24,428 633.57 0.0465
2016-05-13 2016-03-31 13F AMPHENOL CORP CL A 032095101 57,600 -385,000 -86.99 3,330 -85.60 0.0063
2016-02-11 2015-12-31 13F AMPHENOL CORP CL A 032095101 442,600 23,220 5.54 23,117 8.16 0.0504
2015-11-12 2015-09-30 13F AMPHENOL CORP CL A 032095101 419,380 419,380 21,372 0.0510
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.