Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionBartlett & Co. Wealth Management Llc
Latest Disclosed Ownership751 shares
Latest Disclosed Value $ 105,914
Bartlett & Co. Wealth Management Llc reports 35.59% decrease in ownership of APH / Amphenol Corporation

On May 6, 2026 - Bartlett & Co. Wealth Management Llc filed a 13F-HR form disclosing ownership of 751 shares of Amphenol Corporation (US:APH) valued at $94,889 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 22, 2026 disclosing 1,166 shares of Amphenol Corporation. This represents a change in shares of -35.59% during the quarter. The current value of the position is $104,246 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.

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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)
2026-05-06 2026-03-31 13F Amphenol Corp COM 032095101 751 -415 -35.59 106 -33.12 0.0014
2026-01-22 2025-12-31 13F Amphenol Corp COM 032095101 1,166 405 53.22 158 67.02 0.0021
2025-10-09 2025-09-30 13F Amphenol Corp COM 032095101 761 45 6.28 94 34.29 0.0012
2025-07-18 2025-06-30 13F Amphenol Corp COM 032095101 716 3 0.42 71 52.17 0.0010
2025-04-24 2025-03-31 13F Amphenol Corp COM 032095101 713 -3,937 -84.67 47 -85.76 0.0007
2025-01-17 2024-12-31 13F Amphenol Corp COM 032095101 4,650 0 0.00 324 6.60 0.0047
2024-10-17 2024-09-30 13F Amphenol Corp COM 032095101 4,650 -468 -9.14 304 -12.17 0.0044
2024-07-12 2024-06-30 13F Amphenol Corp COM 032095101 5,118 2,559 100.00 345 16.95 0.0052
2024-05-09 2024-03-31 13F Amphenol Corp COM 032095101 2,559 0 0.00 296 15.69 0.0046
2024-02-14 2023-12-31 13F Amphenol Corp COM 032095101 2,559 0 0.00 255 18.60 0.0041
2024-02-14 2023-09-30 13F Amphenol Corp COM 032095101 2,559 234 10.06 215 9.14 0.0039
2024-02-14 2023-06-30 13F Amphenol Corp COM 032095101 2,325 -25 -1.06 198 2.60 0.0034
2024-02-14 2023-03-31 13F Amphenol Corp COM 032095101 2,350 0 0.00 193 7.26 0.0037
2024-02-14 2022-12-31 13F Amphenol Corp COM 032095101 2,350 0 0.00 179 14.01 0.0036
2024-02-14 2022-09-30 13F Amphenol Corp COM 032095101 2,350 -286 -10.85 158 -7.65 0.0034
2024-02-14 2022-06-30 13F Amphenol Corp COM 032095101 2,636 286 12.17 170 -3.95 0.0034
2024-02-14 2022-03-31 13F Amphenol Corp COM 032095101 2,350 2,350 178 0.0031
2024-02-14 2021-12-31 13F Amphenol COM 032095101 0 -2,350 -100.00 0 -100.00
2024-02-14 2021-09-30 13F Amphenol COM 032095101 2,350 0 0.00 172 6.83 0.0033
2024-02-14 2021-06-30 13F Amphenol COM 032095101 2,350 0 0.00 161 3.87 0.0031
2024-02-14 2021-03-31 13F Amphenol COM 032095101 2,350 1,175 100.00 155 1.31 0.0031
2024-02-13 2020-12-31 13F Amphenol COM 032095101 1,175 0 0.00 154 20.47 0.0033
2024-02-13 2020-09-30 13F Amphenol COM 032095101 1,175 0 0.00 128 13.39 0.0030
2024-02-13 2020-06-30 13F Amphenol COM 032095101 1,175 0 0.00 113 31.76 0.0029
2024-02-13 2020-03-31 13F Amphenol COM 032095101 1,175 -387 -24.78 86 -49.70 0.0026
2024-02-13 2019-12-31 13F Amphenol COM 032095101 1,562 387 32.94 169 49.56 0.0041
2024-02-13 2019-09-30 13F Amphenol COM 032095101 1,175 0 0.00 114 0.00 0.0030
2024-02-13 2019-06-30 13F Amphenol COM 032095101 1,175 0 0.00 113 1.80 0.0042
2024-02-13 2019-03-31 13F Amphenol COM 032095101 1,175 0 0.00 111 16.84 0.0043
2024-02-13 2018-12-31 13F Amphenol COM 032095101 1,175 0 0.00 95 -13.64 0.0041
2024-02-13 2018-09-30 13F Amphenol COM 032095101 1,175 1,175 111 0.0042
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.