Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionJanney Montgomery Scott LLC
Latest Disclosed Ownership343,142 shares
Latest Disclosed Value $ 43,356
Janney Montgomery Scott LLC reports 42.12% increase in ownership of APH / Amphenol Corporation

On April 22, 2026 - Janney Montgomery Scott LLC filed a 13F-HR form disclosing ownership of 343,142 shares of Amphenol Corporation (US:APH) valued at $43,355,992 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 241,439 shares of Amphenol Corporation. This represents a change in shares of 42.12% during the quarter. The current value of the position is $47,631,541 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)
2026-04-22 2026-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 343,142 101,703 42.12 43 34.38 0.1073
2026-02-11 2025-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 241,439 -42,140 -14.86 33 -8.57 0.0748
2025-10-27 2025-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 283,579 20,836 7.93 35 40.00 0.0832
2025-07-17 2025-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 262,743 -33,309 -11.25 26 31.58 0.0678
2025-04-17 2025-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 296,052 3,858 1.32 19 -5.00 0.0550
2025-01-17 2024-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 292,194 4,956 1.73 20 11.11 0.0562
2024-10-29 2024-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 287,238 -8,382 -2.84 19 -5.26 0.0522
2024-07-25 2024-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 295,620 142,917 93.59 20 11.76 0.0607
2024-05-01 2024-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 152,703 2,107 1.40 18 21.43 0.0524
2024-02-08 2023-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 150,596 8,575 6.04 15 27.27 0.0484
2023-11-08 2023-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 142,021 2,118 1.51 12 0.00 0.0445
2023-07-26 2023-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 139,903 139,903 12 0.0415
2023-04-28 2023-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 0 -22,628 -100.00 0 -100.00
2023-02-01 2022-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 22,628 111 0.49 2 -99.93 0.0067
2022-10-25 2022-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 22,517 22,517 1,508 0.0065
2021-04-27 2021-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 0 -11,304 -100.00 0 -100.00
2021-01-25 2020-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 11,304 288 2.61 1,478 23.89 0.0071
2020-11-06 2020-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 11,016 -1,085 -8.97 1,193 2.93 0.0068
2020-07-23 2020-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 12,101 102 0.85 1,159 32.61 0.0073
2020-04-30 2020-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 11,999 -3,512 -22.64 874 -47.95 0.0069
2020-01-21 2019-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 15,511 450 2.99 1,679 15.55 0.0110
2019-10-29 2019-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 15,061 1,660 12.39 1,453 12.99 0.0106
2019-07-29 2019-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 13,401 1,287 10.62 1,286 12.41 0.0099
2019-04-30 2019-03-31 13F/A-1 AMPHENOL CORP CL A Common Stock 032095101 12,114 5,520 83.71 1,144 114.23 0.0094
2019-04-30 2019-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 6,594 0 534
2019-02-01 2018-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 6,594 343 5.49 534 -9.18 0.0051
2018-11-05 2018-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 6,251 210 3.48 588 11.79 0.0051
2018-07-24 2018-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 6,041 -318 -5.00 526 -4.01 0.0051
2018-04-19 2018-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 6,359 -884 -12.20 548 -13.84 0.0055
2018-02-14 2017-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 7,243 493 7.30 636 11.38 0.0066
2017-11-15 2017-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 6,750 -199 -2.86 571 11.31 0.0065
2017-07-27 2017-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 6,949 263 3.93 513 7.77 0.0064
2017-04-26 2017-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 6,686 3,536 112.25 476 124.53 0.0063
2017-02-13 2016-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 3,150 -753 -19.29 212 -16.21 0.0032
2016-11-14 2016-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 3,903 23 0.59 253 24.63 0.0045
2016-08-05 2016-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 3,880 -575 -12.91 203 -21.32 0.0032
2016-05-10 2016-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 4,455 575 14.82 258 27.09 0.0068
2016-02-19 2015-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 3,880 -380 -8.92 203 -6.45 0.0052
2015-11-16 2015-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 4,260 -1,300 -23.38 217 -32.61 0.0061
2015-08-04 2015-06-30 13F AMPHENOL CORP CL A Common Stock 032095101 5,560 535 10.65 322 8.78 0.0067
2015-05-12 2015-03-31 13F/A-1 AMPHENOL CORP CL A Common Stock 032095101 5,025 150 3.08 296 12.98 0.0055
2015-04-30 2015-03-31 13F AMPHENOL CORP CL A Common Stock 032095101 5,025 296
2015-02-10 2014-12-31 13F AMPHENOL CORP CL A Common Stock 032095101 4,875 1,362 38.77 262 -25.14 0.0052
2014-11-14 2014-09-30 13F AMPHENOL CORP CL A Common Stock 032095101 3,513 3,513 351 0.0073
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.