Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionStrs Ohio
Latest Disclosed Ownership568,490 shares
Latest Disclosed Value $ 71,828,712
Strs Ohio reports 0.20% decrease in ownership of APH / Amphenol Corporation

On April 24, 2026 - Strs Ohio filed a 13F-HR form disclosing ownership of 568,490 shares of Amphenol Corporation (US:APH) valued at $71,828,712 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 569,607 shares of Amphenol Corporation. This represents a change in shares of -0.20% during the quarter. The current value of the position is $83,920,494 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)
2026-04-24 2026-03-31 13F AMPHENOL CORPCL A COM_STK 032095101 568,490 -1,117 -0.20 71,829 -6.69 0.2850
2026-02-02 2025-12-31 13F AMPHENOL CORPCL A COM_STK 032095101 569,607 17,261 3.13 76,977 12.62 0.2871
2025-10-30 2025-09-30 13F AMPHENOL CORP-CL A COM_STK 032095101 552,346 191,243 52.96 68,353 91.69 0.2506
2025-08-04 2025-06-30 13F AMPHENOL CORP-CL A COM_STK 032095101 361,103 -1,668 -0.46 35,659 49.86 0.1331
2025-05-28 2025-03-31 13F AMPHENOL CORP-CL A COM_STK 032095101 362,771 -12,721 -3.39 23,794 -8.75 0.0997
2025-05-28 2024-12-31 13F AMPHENOL CORP-CL A COM_STK 032095101 375,492 -42,627 -10.19 26,078 -4.28 0.1034
2024-11-01 2024-09-30 13F AMPHENOL CORP-CL A COM_STK 032095101 418,119 -1,495 -0.36 27,245 -3.63 0.1048
2024-08-05 2024-06-30 13F AMPHENOL CORP-CL A COM_STK 032095101 419,614 278,636 197.65 28,269 176,581.25 0.1117
2024-05-13 2024-03-31 13F AMPHENOL CORP-CL A COM_STK 032095101 140,978 2,331 1.68 16 23.08 0.0648
2024-01-30 2023-12-31 13F AMPHENOL CORP-CL A COM 032095101 138,647 -14,947 -9.73 14 8.33 0.0572
2023-10-26 2023-09-30 13F/A-1 AMPHENOL CORP-CL A COM 032095101 153,594 3,073 2.04 13 0.00 0.0574
2023-10-26 2023-09-30 13F AMPHENOL CORP-CL A COM 032095101 153,594 3,073 13 0.0574
2023-07-31 2023-06-30 13F AMPHENOL CORP-CL A COM 032095101 150,521 -4,403 -2.84 13 0.00 0.0540
2023-08-02 2023-03-31 13F/A-2 AMPHENOL CORP-CL A COM 032095101 154,924 693 0.45 13 9.09 0.0548
2023-08-02 2023-03-31 13F/A-1 AMPHENOL CORP-CL A COM 032095101 154,924 13
2023-01-26 2022-12-31 13F AMPHENOL CORP-CL A COM 032095101 154,231 -34,333 -18.21 12 -99.91 0.0530
2022-10-27 2022-09-30 13F AMPHENOL CORP-CL A COM 032095101 188,564 -21,853 -10.39 12,626 -6.79 0.0602
2022-07-25 2022-06-30 13F AMPHENOL CORP-CL A COM 032095101 210,417 -56,484 -21.16 13,546 -32.64 0.0610
2022-04-21 2022-03-31 13F AMPHENOL CORP-CL A COM 032095101 266,901 -24,249 -8.33 20,110 -21.02 0.0736
2022-01-24 2021-12-31 13F AMPHENOL CORP-CL A COM 032095101 291,150 -185,481 -38.92 25,463 -27.05 0.0884
2021-10-22 2021-09-30 13F AMPHENOL CORP-CL A COM 032095101 476,631 -294,489 -38.19 34,903 -33.84 0.1313
2021-07-26 2021-06-30 13F AMPHENOL CORP-CL A COM 032095101 771,120 -215,267 -21.82 52,752 -18.93 0.1897
2021-04-23 2021-03-31 13F AMPHENOL CORP-CL A COM 032095101 986,387 483,420 96.11 65,071 -1.07 0.2450
2021-01-25 2020-12-31 13F AMPHENOL CORP-CL A COM 032095101 502,967 259,413 106.51 65,772 149.43 0.2537
2020-12-14 2020-09-30 13F AMPHENOL CORP-CL A COM 032095101 243,554 -112,578 -31.61 26,369 -22.72 0.1104
2020-07-23 2020-06-30 13F AMPHENOL CORP-CL A COM 032095101 356,132 5,671 1.62 34,121 33.59 0.1491
2020-04-23 2020-03-31 13F AMPHENOL CORP-CL A COM 032095101 350,461 -358,305 -50.55 25,541 -66.70 0.1345
2020-01-24 2019-12-31 13F AMPHENOL CORP-CL A COM 032095101 708,766 3,291 0.47 76,709 12.68 0.3213
2019-10-21 2019-09-30 13F/A-1 AMPHENOL CORP-CL A COM 032095101 705,475 -431 -0.06 68,078 0.52 0.2985
2019-10-21 2019-09-30 13F AMPHENOL CORP-CL A COM 032095101 705,475 -3,291 68,078 301,317.0038
2019-07-25 2019-06-30 13F AMPHENOL CORP-CL A COM 032095101 705,906 -5,773 -0.81 67,724 0.76 0.3011
2019-04-19 2019-03-31 13F AMPHENOL CORP-CL A COM 032095101 711,679 -70,928 -9.06 67,210 6.00 0.3047
2019-01-23 2018-12-31 13F AMPHENOL CORP-CL A COM 032095101 782,607 -52,895 -6.33 63,406 -19.28 0.3219
2018-10-19 2018-09-30 13F AMPHENOL CORP-CL A COM 032095101 835,502 -84,843 -9.22 78,553 -2.06 0.3445
2018-08-06 2018-06-30 13F AMPHENOL CORP-CL A COM 032095101 920,345 56,039 6.48 80,208 7.75 0.3453
2018-04-20 2018-03-31 13F AMPHENOL CORP-CL A COM 032095101 864,306 -11,241 -1.28 74,442 -3.16 0.3292
2018-01-23 2017-12-31 13F AMPHENOL CORP-CL A COM 032095101 875,547 -36,116 -3.96 76,873 -0.38 0.3284
2017-10-23 2017-09-30 13F AMPHENOL CORP-CL A COM 032095101 911,663 84 0.01 77,163 14.67 0.3313
2017-07-26 2017-06-30 13F AMPHENOL CORP-CL A COM 032095101 911,579 -20,863 -2.24 67,292 1.40 0.2998
2017-04-26 2017-03-31 13F AMPHENOL CORP-CL A COM 032095101 932,442 392 0.04 66,361 5.95 0.2875
2017-01-24 2016-12-31 13F AMPHENOL CORP-CL A COM 032095101 932,050 -87,279 -8.56 62,633 -5.35 0.2760
2016-10-27 2016-09-30 13F AMPHENOL CORP-CL A COM 032095101 1,019,329 -42,952 -4.04 66,174 8.66 0.2956
2016-07-26 2016-06-30 13F AMPHENOL CORP-CL A COM 032095101 1,062,281 497 0.05 60,900 -0.80 0.2707
2016-04-25 2016-03-31 13F/A-1 AMPHENOL CORP-CL A COM 032095101 1,061,784 -263,114 -19.86 61,392 -11.28 0.2757
2016-01-28 2015-12-31 13F AMPHENOL CORP-CL A COM 032095101 1,324,898 582 0.04 69,199 2.54 0.3094
2015-10-21 2015-09-30 13F AMPHENOL CORP-CL A COM 032095101 1,324,316 38,436 2.99 67,487 -9.46 0.3211
2015-08-04 2015-06-30 13F AMPHENOL CORP-CL A COM 032095101 1,285,880 194,826 17.86 74,542 15.94 0.3273
2015-04-27 2015-03-31 13F/A-1 AMPHENOL CORP-CL A COM 032095101 1,091,054 -4,090 -0.37 64,295 9.10 0.2836
2015-04-21 2015-03-31 13F AMPHENOL CORP-CL A COM 032095101 64,295,812 63,667
2015-01-23 2014-12-31 13F AMPHENOL CORP-CL A COM 032095101 1,095,144 644,944 143.26 58,930 31.08 0.2555
2014-10-29 2014-09-30 13F/A-1 AMPHENOL CORP-CL A COM 032095101 450,200 0 0.00 44,957 3.65 0.1985
2014-07-24 2014-06-30 13F AMPHENOL CORP-CL A COM 032095101 450,200 -207,700 -31.57 43,372 -28.07 0.1933
2014-04-28 2014-03-31 13F AMPHENOL CORP-CL A COM 032095101 657,900 215,000 48.54 60,297 52.66 0.2712
2014-01-30 2013-12-31 13F AMPHENOL CORP-CL A COM 032095101 442,900 87,900 24.76 39,498 43.79 0.1776
2013-10-24 2013-09-30 13F AMPHENOL CORP-CL A COM 032095101 355,000 24,836 7.52 27,470 6.75 0.1211
2013-08-12 2013-06-30 13F AMPHENOL CORP-CL A COM 032095101 330,164 330,164 25,733 0.1106
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.