Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionAssenagon Asset Management S.A.
Latest Disclosed Ownership29,581 shares
Latest Disclosed Value $ 3,737,559
Assenagon Asset Management S.A. reports 5.02% increase in ownership of APH / Amphenol Corporation

On April 20, 2026 - Assenagon Asset Management S.A. filed a 13F-HR form disclosing ownership of 29,581 shares of Amphenol Corporation (US:APH) valued at $3,737,559 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 28,168 shares of Amphenol Corporation. This represents a change in shares of 5.02% during the quarter. The current value of the position is $4,106,139 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)
2026-04-20 2026-03-31 13F AMPHENOL CL A 032095101 29,581 1,413 5.02 3,738 -1.81 0.0057
2026-01-09 2025-12-31 13F AMPHENOL CORP CL A 032095101 28,168 1,708 6.46 3,807 16.25 0.0052
2025-10-07 2025-09-30 13F AMPHENOL CORP CL A 032095101 26,460 -2,309 -8.03 3,274 15.28 0.0045
2025-07-11 2025-06-30 13F AMPHENOL CORP CL A 032095101 28,769 -33,151 -53.54 2,841 -30.07 0.0042
2025-04-15 2025-03-31 13F AMPHENOL CORP CL A 032095101 61,920 2,514 4.23 4,061 -1.55 0.0068
2025-01-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 59,406 -2,548 -4.11 4,126 2.21 0.0067
2024-10-23 2024-09-30 13F AMPHENOL CORP CL A 032095101 61,954 -1,255 -1.99 4,037 -5.21 0.0074
2024-07-18 2024-06-30 13F AMPHENOL CORP CL A 032095101 63,209 -37,421 -37.19 4,258 -63.32 0.0095
2024-04-24 2024-03-31 13F AMPHENOL CORP CL A 032095101 100,630 65,060 182.91 11,608 229.18 0.0275
2024-01-17 2023-12-31 13F AMPHENOL CORP CL A 032095101 35,570 -1,290 -3.50 3,526 13.93 0.0094
2023-11-06 2023-09-30 13F AMPHENOL CORP CL A 032095101 36,860 -1,338 -3.50 3,096 -4.59 0.0096
2023-07-25 2023-06-30 13F AMPHENOL CORP CL A 032095101 38,198 25,754 206.96 3,245 219.29 0.0112
2023-04-18 2023-03-31 13F AMPHENOL CORP CL A 032095101 12,444 -178,269 -93.48 1,017 7,157.14 0.0036
2023-01-12 2022-12-31 13F AMPHENOL CORP CL A 032095101 190,713 65,461 52.26 15 -99.83 0.0524
2022-10-27 2022-09-30 13F AMPHENOL CORP CL A 032095101 125,252 120,493 2,531.90 8,387 2,640.85 0.0322
2022-07-27 2022-06-30 13F AMPHENOL CORP CL A 032095101 4,759 -129 -2.64 306 -16.85 0.0011
2022-04-25 2022-03-31 13F AMPHENOL CORP CL A 032095101 4,888 -53 -1.07 368 -14.81 0.0010
2022-02-01 2021-12-31 13F AMPHENOL CORP CL A 032095101 4,941 488 10.96 432 32.52 0.0013
2021-10-19 2021-09-30 13F AMPHENOL CORP CL A 032095101 4,453 4,453 326 0.0010
2021-04-26 2021-03-31 13F AMPHENOL CORP CL A 032095101 0 -21,835 -100.00 0 -100.00
2021-02-01 2020-12-31 13F AMPHENOL CORP CL A 032095101 21,835 19,722 933.36 2,855 1,146.72 0.0124
2020-10-07 2020-09-30 13F AMPHENOL CORP CL A 032095101 2,113 -77,275 -97.34 229 -96.99 0.0013
2020-07-21 2020-06-30 13F AMPHENOL CORP CL A 032095101 79,388 79,388 7,606 0.0488
2020-04-17 2020-03-31 13F AMPHENOL CORP CL A 032095101 0 -120,113 -100.00 0 -100.00
2020-01-17 2019-12-31 13F AMPHENOL CORP CL A 032095101 120,113 120,113 13,000 0.0818
2019-04-26 2019-03-31 13F AMPHENOL CORP CL A 032095101 0 -3,335 -100.00 0 -100.00
2019-01-23 2018-12-31 13F AMPHENOL CORP CL A 032095101 3,335 -10,702 -76.24 270 -79.55 0.0031
2018-10-29 2018-09-30 13F AMPHENOL CORP CL A 032095101 14,037 -372,955 -96.37 1,320 -96.09 0.0130
2018-07-17 2018-06-30 13F AMPHENOL CORP CL A 032095101 386,992 386,992 33,726 0.3893
2018-04-30 2018-03-31 13F AMPHENOL CORP CL A 032095101 0 -407,905 -100.00 0 -100.00
2018-01-25 2017-12-31 13F AMPHENOL CORP CL A 032095101 407,905 407,905 35,814 0.3686
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.