암페놀 주식회사
MX ˙ BMV ˙ US0320951017
SecurityMX:APH / Amphenol Corporation
InstitutionDuncker Streett & Co Inc
Latest Disclosed Ownership40,852 shares
Latest Disclosed Value $ 5,161,650
Duncker Streett & Co Inc reports 0.24% decrease in ownership of APH / Amphenol Corporation

On April 29, 2026 - Duncker Streett & Co Inc filed a 13F-HR form disclosing ownership of 40,852 shares of Amphenol Corporation (MX:APH) valued at $5,161,650 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 40,952 shares of Amphenol Corporation. This represents a change in shares of -0.24% during the quarter.

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)
2026-04-29 2026-03-31 13F AMPHENOL CL A 032095101 40,852 -100 -0.24 5,162 -6.74 0.9811
2026-01-27 2025-12-31 13F AMPHENOL CORP CL A 032095101 40,952 0 0.00 5,534 9.22 0.9835
2025-10-23 2025-09-30 13F AMPHENOL CORP CL A 032095101 40,952 -2,788 -6.37 5,068 17.32 0.8829
2025-07-28 2025-06-30 13F AMPHENOL CORP CL A 032095101 43,740 0 0.00 4,319 50.59 0.7882
2025-04-22 2025-03-31 13F AMPHENOL CORP CL A 032095101 43,740 -2,428 -5.26 2,869 -10.54 0.5684
2025-02-05 2024-12-31 13F AMPHENOL CORP CL A 032095101 46,168 0 0.00 3,206 6.58 0.5953
2024-11-12 2024-09-30 13F AMPHENOL CORP CL A 032095101 46,168 0 0.00 3,008 -3.28 0.5490
2024-07-31 2024-06-30 13F AMPHENOL CORP CL A 032095101 46,168 23,084 100.00 3,110 16.83 0.5980
2024-04-23 2024-03-31 13F AMPHENOL CORP CL A 032095101 23,084 -140 -0.60 2,663 15.64 0.5257
2024-01-30 2023-12-31 13F AMPHENOL CORP CL A 032095101 23,224 0 0.00 2,302 18.05 0.4860
2023-10-26 2023-09-30 13F AMPHENOL CORP CL A 032095101 23,224 0 0.00 1,951 -1.12 0.4540
2023-07-20 2023-06-30 13F AMPHENOL CORP CL A 032095101 23,224 -76 -0.33 1,973 3.57 0.4412
2023-04-24 2023-03-31 13F AMPHENOL CORP CL A 032095101 23,300 0 0.00 1,904 7.33 0.4535
2023-01-25 2022-12-31 13F AMPHENOL CORP CL A 032095101 23,300 152 0.66 1,774 14.45 0.4283
2022-11-04 2022-09-30 13F AMPHENOL CORP CL A 032095101 23,148 0 0.00 1,550 4.03 0.4020
2022-08-04 2022-06-30 13F AMPHENOL CORP CL A 032095101 23,148 -100 -0.43 1,490 -14.95 0.3571
2022-05-09 2022-03-31 13F AMPHENOL CORP CL A 032095101 23,248 -3,630 -13.51 1,752 -25.48 0.3484
2022-02-08 2021-12-31 13F AMPHENOL CORP CL A 032095101 26,878 -30 -0.11 2,351 19.34 0.4048
2021-11-03 2021-09-30 13F AMPHENOL CORP CL A 032095101 26,908 -2,300 -7.87 1,970 -1.40 0.3730
2021-07-27 2021-06-30 13F AMPHENOL CORP CL A 032095101 29,208 -90 -0.31 1,998 3.36 0.3684
2021-04-28 2021-03-31 13F AMPHENOL CORP CL A 032095101 29,298 1,949 7.13 1,933 -45.95 0.3686
2021-02-02 2020-12-31 13F AMPHENOL CORP CL A 032095101 27,349 -1,200 -4.20 3,576 15.69 0.6919
2020-10-28 2020-09-30 13F AMPHENOL CORP CL A 032095101 28,549 0 0.00 3,091 13.02 0.6748
2020-07-22 2020-06-30 13F AMPHENOL CORP CL A 032095101 28,549 -940 -3.19 2,735 27.27 0.6508
2020-04-27 2020-03-31 13F AMPHENOL CORP CL A 032095101 29,489 -700 -2.32 2,149 -34.24 0.5738
2020-01-27 2019-12-31 13F AMPHENOL CORP CL A 032095101 30,189 -230 -0.76 3,268 11.35 0.6855
2019-10-31 2019-09-30 13F AMPHENOL CORP CL A 032095101 30,419 345 1.15 2,935 1.70 0.6824
2019-07-24 2019-06-30 13F AMPHENOL CORP CL A 032095101 30,074 1,075 3.71 2,886 5.37 0.6477
2019-04-29 2019-03-31 13F AMPHENOL CORP CL A 032095101 28,999 200 0.69 2,739 17.35 0.6311
2019-01-24 2018-12-31 13F AMPHENOL CORP CL A 032095101 28,799 8,350 40.83 2,334 21.44 0.6248
2018-10-22 2018-09-30 13F AMPHENOL CORP CL A 032095101 20,449 300 1.49 1,922 9.45 0.4365
2018-07-23 2018-06-30 13F AMPHENOL CORP CL A 032095101 20,149 0 0.00 1,756 1.15 0.4355
2018-04-26 2018-03-31 13F AMPHENOL CORP CL A 032095101 20,149 350 1.77 1,736 -0.12 0.4394
2018-01-23 2017-12-31 13F AMPHENOL CORP CL A 032095101 19,799 -85 -0.43 1,738 3.27 0.4468
2017-10-25 2017-09-30 13F AMPHENOL CORP CL A 032095101 19,884 0 0.00 1,683 14.65 0.5094
2017-07-21 2017-06-30 13F AMPHENOL CORP CL A 032095101 19,884 650 3.38 1,468 7.23 0.4578
2017-04-25 2017-03-31 13F AMPHENOL CORP CL A 032095101 19,234 -5,000 -20.63 1,369 -15.96 0.4292
2017-01-26 2016-12-31 13F AMPHENOL CORP CL A 032095101 24,234 0 0.00 1,629 3.56 0.5418
2016-10-20 2016-09-30 13F AMPHENOL CORP CL A 032095101 24,234 0 0.00 1,573 13.25 0.5449
2016-07-20 2016-06-30 13F AMPHENOL CORP CL A 032095101 24,234 200 0.83 1,389 -0.07 0.4940
2016-04-25 2016-03-31 13F AMPHENOL CORP CL A 032095101 24,034 -4,482 -15.72 1,390 -6.65 0.5145
2016-01-20 2015-12-31 13F AMPHENOL CORP CL A 032095101 28,516 -1,300 -4.36 1,489 -1.97 0.5580
2015-10-27 2015-09-30 13F AMPHENOL CORP CL A 032095101 29,816 600 2.05 1,519 -10.33 0.5906
2015-07-20 2015-06-30 13F AMPHENOL CORP CL A 032095101 29,216 0 0.00 1,694 -1.63 0.5904
2015-04-28 2015-03-31 13F AMPHENOL CORP CL A 032095101 29,216 0 0.00 1,722 9.54 0.5636
2015-01-22 2014-12-31 13F AMPHENOL CORP CL A 032095101 29,216 15,008 105.63 1,572 10.78 0.5154
2014-10-23 2014-09-30 13F AMPHENOL CORP CL A 032095101 14,208 -1,067 -6.99 1,419 -3.60 0.4837
2014-07-23 2014-06-30 13F AMPHENOL CORP CL A 032095101 15,275 441 2.97 1,472 8.24 0.4762
2014-04-23 2014-03-31 13F AMPHENOL CORP CL A 032095101 14,834 -3,800 -20.39 1,360 -18.17 0.4813
2014-01-22 2013-12-31 13F AMPHENOL CORP CL A 032095101 18,634 525 2.90 1,662 18.63 0.5982
2013-10-23 2013-09-30 13F AMPHENOL CORP CL A 032095101 18,109 -3,166 -14.88 1,401 -15.50 0.5673
2013-07-26 2013-06-30 13F AMPHENOL CORP CL A 032095101 21,275 21,275 1,658 0.6349
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.