Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionNational Asset Management, Inc.
Latest Disclosed Ownership7,751 shares
Latest Disclosed Value $ 923,577
National Asset Management, Inc. reports 48.50% decrease in ownership of APH / Amphenol Corporation

On April 24, 2026 - National Asset Management, Inc. filed a 13F-HR form disclosing ownership of 7,751 shares of Amphenol Corporation (US:APH) valued at $979,339 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,050 shares of Amphenol Corporation. This represents a change in shares of -48.50% during the quarter. The current value of the position is $1,075,916 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)
2026-04-24 2026-03-31 13F AMPHENOL CL A 032095101 7,751 -7,299 -48.50 924 -54.60 0.0585
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A 032095101 15,050 3,628 31.76 2,034 43.88 0.0938
2025-10-31 2025-09-30 13F AMPHENOL CORP CL A 032095101 11,422 2,530 28.45 1,414 60.93 0.0654
2025-08-19 2025-06-30 13F AMPHENOL CORP CL A 032095101 8,892 3,420 62.50 878 131.05 0.0412
2025-02-25 2024-12-31 13F AMPHENOL CORP CL A 032095101 5,472 -1,142 -17.27 381 -11.21 0.0125
2024-12-13 2024-09-30 13F AMPHENOL CORP CL A 032095101 6,614 -853 -11.42 428 -14.91 0.0119
2024-12-13 2024-09-30 13F AMPHENOL CORP CL A 032095101 6,614 428
2024-08-19 2024-06-30 13F AMPHENOL CORP CL A 032095101 7,467 -23,819 -76.13 504 -80.90 0.0128
2024-05-16 2024-03-31 13F AMPHENOL CORP CL A 032095101 31,286 80 0.26 2,634 -15.03 0.0712
2024-03-15 2023-12-31 13F AMPHENOL CORP CL A 032095101 31,206 -80 -0.26 3,100 17.69 0.0835
2023-12-01 2023-09-30 13F AMPHENOL CORP CL A 032095101 31,286 -47,287 -60.18 2,634 -60.57 0.0712
2023-07-27 2023-06-30 13F AMPHENOL CORP CL A 032095101 78,573 32,117 69.13 6,681 75.68 0.1499
2023-05-17 2023-03-31 13F AMPHENOL CORP CL A 032095101 46,456 -13,810 -22.92 3,804 -17.29 0.1013
2023-03-15 2022-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 60,266 14,394 31.38 4,599 49.63 0.1288
2023-02-21 2022-12-31 13F AMPHENOL CORP CL A 032095101 60,266 14,394 4,599 0.1157
2022-11-22 2022-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 45,872 26,361 135.11 3,073 144.47 0.0928
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 45,872 26,361 3,073 0.0446
2022-08-12 2022-06-30 13F AMPHENOL CORP CL A 032095101 19,511 -329 -1.66 1,257 -15.92 0.0529
2022-05-02 2022-03-31 13F AMPHENOL CORP CL A 032095101 19,840 1,505 8.21 1,495 -6.80 0.0489
2022-01-28 2021-12-31 13F AMPHENOL CORP CL A 032095101 18,335 328 1.82 1,604 21.61 0.0462
2021-11-16 2021-09-30 13F AMPHENOL CORP CL A 032095101 18,007 369 2.09 1,319 9.28 0.0420
2021-08-10 2021-06-30 13F AMPHENOL CORP CL A 032095101 17,638 -2,269 -11.40 1,207 -8.14 0.0392
2021-05-13 2021-03-31 13F AMPHENOL CORP CL A 032095101 19,907 13,208 197.16 1,314 49.83 0.0465
2021-02-04 2020-12-31 13F AMPHENOL CORP CL A 032095101 6,699 196 3.01 877 24.40 0.0469
2020-11-09 2020-09-30 13F AMPHENOL CORP CL A 032095101 6,503 280 4.50 705 18.09 0.0376
2020-07-31 2020-06-30 13F AMPHENOL CORP CL A 032095101 6,223 -1,783 -22.27 597 2.05 0.0399
2020-05-06 2020-03-31 13F AMPHENOL CORP CL A 032095101 8,006 8,006 585 0.0499
2020-02-10 2019-12-31 13F AMPHENOL CORP CL A 032095101 0 -5,996 -100.00 0 -100.00
2019-11-12 2019-09-30 13F AMPHENOL CORP CL A 032095101 5,996 723 13.71 580 14.40 0.0571
2019-08-05 2019-06-30 13F AMPHENOL CORP CL A 032095101 5,273 1,783 51.09 507 53.64 0.0556
2019-05-08 2019-03-31 13F AMPHENOL CORP CL A 032095101 3,490 3,490 330 0.0412
2015-05-14 2015-03-31 13F AMPHENOL CORP CL A 032095101 0 -235 -100.00 0 -100.00
2015-02-18 2014-12-31 13F AMPHENOL CORP CL A 032095101 235 235 13 0.0003
2014-11-14 2014-09-30 13F Amphenol Mid Core 032095101 0 -245 -100.00 0 -100.00
2014-08-14 2014-06-30 13F Amphenol Mid Core 032095101 245 245 24 0.0055
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.