Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionQuantinno Capital Management LP
Latest Disclosed Ownership718,905 shares
Latest Disclosed Value $ 90,833,757
Quantinno Capital Management LP reports 19.62% increase in ownership of APH / Amphenol Corporation

On May 15, 2026 - Quantinno Capital Management LP filed a 13F-HR form disclosing ownership of 718,905 shares of Amphenol Corporation (US:APH) valued at $90,833,647 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 600,976 shares of Amphenol Corporation. This represents a change in shares of 19.62% during the quarter. The current value of the position is $106,124,756 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)
2026-05-15 2026-03-31 13F AMPHENOL CL A 032095101 718,905 117,929 19.62 90,834 11.84 0.1516
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A 032095101 600,976 127,476 26.92 81,216 38.60 0.1631
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A 032095101 473,500 145,809 44.50 58,596 81.08 0.1599
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A 032095101 327,691 101,624 44.95 32,360 118.24 0.1397
2025-05-12 2025-03-31 13F AMPHENOL CORP CL A 032095101 226,067 56,326 33.18 14,828 25.78 0.0966
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 169,741 10,682 6.72 11,789 13.74 0.1159
2024-11-14 2024-09-30 13F AMPHENOL CORP CL A 032095101 159,059 12,943 8.86 10,364 5.29 0.1347
2024-08-14 2024-06-30 13F AMPHENOL CORP CL A 032095101 146,116 79,989 120.96 9,844 29.04 0.1770
2024-05-14 2024-03-31 13F AMPHENOL CORP CL A 032095101 66,127 2,960 4.69 7,628 21.81 0.1658
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A 032095101 63,167 3,341 5.58 6,262 24.62 0.2192
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 59,826 3,201 5.65 5,025 4.47 0.2287
2023-08-04 2023-06-30 13F AMPHENOL CORP CL A 032095101 56,625 3,324 6.24 4,810 10.42 0.2747
2023-05-03 2023-03-31 13F AMPHENOL CORP CL A 032095101 53,301 193 0.36 4,356 7.72 0.2881
2023-02-13 2022-12-31 13F AMPHENOL CORP CL A 032095101 53,108 37,006 229.82 4,044 275.14 0.3017
2022-11-08 2022-09-30 13F AMPHENOL CORP CL A 032095101 16,102 3,035 23.23 1,078 28.18 0.1388
2022-08-15 2022-06-30 13F AMPHENOL CORP CL A 032095101 13,067 3,158 31.87 841 12.58 0.1213
2022-05-12 2022-03-31 13F AMPHENOL CORP CL A 032095101 9,909 1,836 22.74 747 5.81 0.1139
2022-02-14 2021-12-31 13F AMPHENOL CORP CL A 032095101 8,073 2,992 58.89 706 89.78 0.1278
2021-11-15 2021-09-30 13F AMPHENOL CORP CL A 032095101 5,081 21 0.42 372 7.51 0.4153
2021-08-16 2021-06-30 13F AMPHENOL CORP CL A 032095101 5,060 -2,140 -29.72 346 -27.16 0.3923
2021-05-17 2021-03-31 13F AMPHENOL CORP CL A 032095101 7,200 3,600 100.00 475 0.85 0.5178
2021-02-09 2020-12-31 13F AMPHENOL CORP CL A 032095101 3,600 0 0.00 471 20.77 0.3641
2020-11-16 2020-09-30 13F AMPHENOL CORP CL A 032095101 3,600 0 0.00 390 13.04 0.2608
2020-08-14 2020-06-30 13F AMPHENOL CORP CL A 032095101 3,600 -4,271 -54.26 345 -39.90 0.3402
2020-05-15 2020-03-31 13F AMPHENOL CORP CL A 032095101 7,871 5,642 253.12 574 138.17 0.3584
2020-02-14 2019-12-31 13F AMPHENOL CORP CL A 032095101 2,229 -3,237 -59.22 241 -54.27 0.1517
2019-11-14 2019-09-30 13F AMPHENOL CORP CL A 032095101 5,466 0 0.00 527 0.57 0.3549
2019-08-14 2019-06-30 13F AMPHENOL CORP CL A 032095101 5,466 0 0.00 524 1.55 0.3076
2019-05-14 2019-03-31 13F AMPHENOL CORP CL A 032095101 5,466 5,466 516 0.3305
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.