Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionRockefeller Capital Management L.P.
Latest Disclosed Ownership646,855 shares
Latest Disclosed Value $ 81,730,249
Rockefeller Capital Management L.P. reports 20.06% increase in ownership of APH / Amphenol Corporation

On May 14, 2026 - Rockefeller Capital Management L.P. filed a 13F-HR form disclosing ownership of 646,855 shares of Amphenol Corporation (US:APH) valued at $81,730,129 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 16, 2026 disclosing 538,772 shares of Amphenol Corporation. This represents a change in shares of 20.06% during the quarter. The current value of the position is $95,488,735 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.

Upgrade to unlock premium data and export to Excel .

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 646,855 108,083 20.06 81,730 12.25 0.1449
2026-03-16 2025-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 538,772 88,596 19.68 72,810 30.70 0.1311
2026-02-14 2025-12-31 13F AMPHENOL CORP CL A 032095101 538,503 88,327 72,788 0.0664
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A 032095101 450,176 -24,506 -5.16 55,710 18.85 0.1090
2025-08-14 2025-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 474,682 38,448 8.81 46,875 63.83 0.1028
2025-08-08 2025-06-30 13F AMPHENOL CORP CL A 032095101 474,682 38,448 46,875 0.0591
2025-05-14 2025-03-31 13F AMPHENOL CORP CL A 032095101 436,234 141,247 47.88 28,613 39.27 0.0706
2025-02-13 2024-12-31 13F AMPHENOL CORP CL A 032095101 294,987 82,375 38.74 20,545 47.63 0.0532
2024-11-14 2024-09-30 13F AMPHENOL CORP CL A 032095101 212,612 3,934 1.89 13,917 -1.43 0.0375
2024-08-12 2024-06-30 13F AMPHENOL CORP CL A 032095101 208,678 110,886 113.39 14,119 25.16 0.0401
2024-05-14 2024-03-31 13F AMPHENOL CORP CL A 032095101 97,792 12,046 14.05 11,280 32.71 0.0329
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A 032095101 85,746 343 0.40 8,500 18.50 0.0284
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 85,403 42,424 98.71 7,173 96.47 0.0277
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A 032095101 42,979 28,453 195.88 3,651 365,000.00 0.0141
2023-05-16 2023-03-31 13F AMPHENOL CORP CL A 032095101 14,526 -3,718 -20.38 1 -99.93 0.0051
2023-03-06 2022-12-31 13F AMPHENOL CORP CL A 032095101 18,244 -397 -2.13 1,389 11.39 0.0070
2022-11-02 2022-09-30 13F AMPHENOL CORP CL A 032095101 18,641 7,088 61.35 1,247 67.83 0.0064
2022-08-12 2022-06-30 13F AMPHENOL CORP CL A 032095101 11,553 -2,661 -18.72 743 -30.56 0.0039
2022-05-13 2022-03-31 13F AMPHENOL CORP CL A 032095101 14,214 2,303 19.34 1,070 2.79 0.0052
2022-02-14 2021-12-31 13F AMPHENOL CORP CL A 032095101 11,911 439 3.83 1,041 24.08 0.0049
2021-11-12 2021-09-30 13F AMPHENOL CORP CL A 032095101 11,472 -20 -0.17 839 6.88 0.0044
2021-08-10 2021-06-30 13F AMPHENOL CORP CL A 032095101 11,492 2,055 21.78 785 26.41 0.0044
2021-05-11 2021-03-31 13F AMPHENOL CORP CL A 032095101 9,437 5,035 114.38 621 8.00 0.0042
2021-02-12 2020-12-31 13F AMPHENOL CORP CL A 032095101 4,402 3,623 465.08 575 584.52 0.0044
2020-11-13 2020-09-30 13F AMPHENOL CORP CL A 032095101 779 243 45.34 84 64.71 0.0008
2020-08-12 2020-06-30 13F AMPHENOL CORP CL A 032095101 536 109 25.53 51 64.52 0.0005
2020-05-12 2020-03-31 13F AMPHENOL CORP CL A 032095101 427 -78 -15.45 31 -43.64 0.0004
2020-02-07 2019-12-31 13F AMPHENOL CORP CL A 032095101 505 -208 -29.17 55 -20.29 0.0007
2019-11-12 2019-09-30 13F AMPHENOL CORP CL A 032095101 713 608 579.05 69 590.00 0.0009
2019-08-09 2019-06-30 13F AMPHENOL CORP CL A 032095101 105 -953 -90.08 10 -89.90 0.0001
2019-05-10 2019-03-31 13F AMPHENOL CORP CL A 032095101 1,058 280 35.99 99 57.14 0.0014
2019-02-12 2018-12-31 13F AMPHENOL CORP CL A 032095101 778 0 0.00 63 -13.70 0.0011
2018-11-02 2018-09-30 13F Amphenol Corp Common 032095101 778 0 0.00 73 7.35 0.0011
2018-07-31 2018-06-30 13F Amphenol Corp Common 032095101 778 778 68 0.0011
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.