Amphenol Corporation
MX ˙ BMV ˙ US0320951017
SecurityMX:APH / Amphenol Corporation
InstitutionNomura Holdings Inc
Latest Disclosed Ownership168,334 shares
Latest Disclosed Value $ 21,269,001
Nomura Holdings Inc ownership in APH / Amphenol Corporation

On May 15, 2026 - Nomura Holdings Inc filed a 13F-HR form disclosing ownership of 168,334 shares of Amphenol Corporation (MX:APH) valued at $21,269,001 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 60,612 shares of Amphenol Corporation. This represents a change in shares of 177.72% during the quarter.

Nomura Holdings Inc has a history of taking positions in derivatives of the underlying security (APH) in the form of stock options. The firm currently holds call options representing 301,600 of underlying shares valued at $38,107,160 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:APH / Amphenol Corporation Historical Put/Call Ratio
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 168,334 107,722 177.72 21,269 159.66 0.0432
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A 032095101 60,612 -35,746 -37.10 8,191 -31.31 0.0109
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A 032095101 96,358 64,226 199.88 11,924 275.80 0.0185
2025-08-18 2025-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 32,132 -9,999 -23.73 3,173 14.84 0.0066
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A 032095101 33,594 -8,537 3,317 0.0042
2025-05-15 2025-03-31 13F AMPHENOL CORP CL A 032095101 42,131 -21,112 -33.38 2,763 -37.09 0.0052
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 63,243 59,688 1,678.99 4,392 1,801.30 0.0059
2025-01-13 2024-09-30 13F/A-1 AMPHENOL CORP CL A 032095101 3,555 -39,901 -91.82 232 -92.11 0.0005
2024-11-14 2024-09-30 13F AMPHENOL CORP CL A 032095101 3,555 -39,901 232 0.0004
2024-08-14 2024-06-30 13F AMPHENOL CORP CL A 032095101 43,456 38,667 807.41 2,928 430.25 0.0056
2024-05-15 2024-03-31 13F AMPHENOL CORP CL A 032095101 4,789 -7,281 -60.32 552 -53.85 0.0014
2024-03-27 2023-12-31 13F/A-1 AMPHENOL CORP CL A 032095101 12,070 -132,238 -91.64 1,196 -90.13 0.0032
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A 032095101 12,070 -132,238 1,196 0.0025
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 144,308 144,308 12,120 0.0344
2022-08-17 2022-06-30 13F/A-1 AMPHENOL CORP-CL A CMN 032095101 0 -10,254 -100.00 0 -100.00
2022-08-15 2022-06-30 13F AMPHENOL CORP-CL A CMN 032095101 0 -10,254 0
2022-05-18 2022-03-31 13F AMPHENOL CORP-CL A CMN 032095101 10,254 510 5.23 775 -9.14 0.0023
2022-02-14 2021-12-31 13F AMPHENOL CORP-CL A CMN 032095101 9,744 -3,906 -28.62 853 -16.21 0.0022
2021-11-15 2021-09-30 13F AMPHENOL CORP-CL A CMN 032095101 13,650 208 1.55 1,018 10.77 0.0025
2021-08-16 2021-06-30 13F AMPHENOL CORP-CL A CMN 032095101 13,442 -1,153 -7.90 919 0.0023
2021-05-17 2021-03-31 13F AMPHENOL CORP-CL A CMN 032095101 14,595 -45,377 -75.66 1 -100.00 0.0022
2021-02-16 2020-12-31 13F AMPHENOL CORP-CL A CMN 032095101 59,972 54,576 1,011.42 8 -98.80 0.0131
2020-11-12 2020-09-30 13F AMPHENOL CORP-CL A CMN 032095101 5,396 -2,506 -31.71 584 -22.85 0.0013
2020-08-14 2020-06-30 13F AMPHENOL CORP-CL A CMN 032095101 7,902 7,902 46.44 757 29.62 0.0026
2020-05-15 2020-03-31 13F/A-1 AMPHENOL CORP-CL A CMN 032095101 0 -24,915 -100.00 0 -100.00
2020-02-14 2019-12-31 13F AMPHENOL CORP-CL A CMN 032095101 24,915 -97,790 -79.70 2,695 -77.55 0.0100
2019-08-23 2019-06-30 13F/A-1 AMPHENOL CORP-CL A CMN 032095101 122,705 70,637 135.66 12,006 136.11 0.0531
2019-08-14 2019-06-30 13F AMPHENOL CORP-CL A CMN 032095101 122,705 70,637 12,006
2019-05-14 2019-03-31 13F AMPHENOL CORP-CL A CMN 032095101 52,068 32,853 170.98 5,085 227.22 0.0215
2019-02-14 2018-12-31 13F AMPHENOL CORP-CL A CMN 032095101 19,215 19,215 -63.10 1,554 -69.44 0.0058
2018-11-14 2018-09-30 13F AMPHENOL CORP-CL A CMN 032095101 0 -4,869 -100.00 0 -100.00
2018-08-17 2018-06-30 13F/A-1 AMPHENOL CORP-CL A CMN 032095101 4,869 -29,649 -85.89 424 -85.71 0.0013
2018-08-14 2018-06-30 13F AMPHENOL CORP-CL A CMN 032095101 4,869 -29,649 330
2018-05-14 2018-03-31 13F/A-1 AMPHENOL CORP-CL A CMN 032095101 34,518 4,066 13.35 2,968 10.95 0.0051
2018-05-14 2018-03-31 13F AMPHENOL CORP-CL A CMN 032095101 64,970 5,643
2018-02-14 2017-12-31 13F AMPHENOL CORP-CL A CMN 032095101 30,452 9,086 42.53 2,675 48.28 0.0048
2017-11-14 2017-09-30 13F AMPHENOL CORP-CL A CMN 032095101 21,366 -9,718 -31.26 1,804 -21.53 0.0038
2017-08-15 2017-06-30 13F AMPHENOL CORP-CL A CMN 032095101 31,084 25,090 418.59 2,299 438.41 0.0056
2017-05-18 2017-03-31 13F/A-1 AMPHENOL CORP-CL A CMN 032095101 5,994 -22,201 -78.74 427 -77.48 0.0011
2017-05-15 2017-03-31 13F AMPHENOL CORP-CL A CMN 032095101 5,994 427
2017-02-13 2016-12-31 13F AMPHENOL CORP-CL A CMN 032095101 28,195 28,195 370.39 1,896 344.03 0.0048
2016-11-14 2016-09-30 13F AMPHENOL CORP-CL A CMN 032095101 0 -5,200 -100.00 0 -100.00
2016-09-02 2016-06-30 13F/A-1 AMPHENOL CORP-CL A CMN 032095101 5,200 -1,996 -27.74 299 -27.78 0.0010
2016-08-15 2016-06-30 13F AMPHENOL CORP-CL A CMN 032095101 5,200 299
2016-05-16 2016-03-31 13F AMPHENOL CORP-CL A CMN 032095101 7,196 147 2.09 414 12.20 0.0014
2016-02-12 2015-12-31 13F AMPHENOL CORP-CL A CMN 032095101 7,049 -6,816 -49.16 369 -51.25 0.0010
2015-11-16 2015-09-30 13F AMPHENOL CORP-CL A CMN 032095101 13,865 -36,809 -72.64 757 -75.46 0.0027
2015-08-14 2015-06-30 13F AMPHENOL CORP-CL A CMN 032095101 50,674 45,380 857.20 3,085 840.55 0.0087
2015-05-15 2015-03-31 13F AMPHENOL CORP-CL A CMN 032095101 5,294 -18,621 -77.86 328 -76.01 0.0011
2015-02-17 2014-12-31 13F AMPHENOL CORP-CL A CMN 032095101 23,915 15,178 173.72 1,367 57.13 0.0037
2014-11-14 2014-09-30 13F AMPHENOL CORP-CL A CMN 032095101 8,737 4,903 127.88 870 135.77 0.0024
2014-08-13 2014-06-30 13F AMPHENOL CORP-CL A CMN 032095101 3,834 -25,277 -86.83 369 -86.18 0.0001
2014-05-14 2014-03-31 13F AMPHENOL CORP-CL A CMN 032095101 29,111 16,820 136.85 2,670 144.28 0.0008
2014-02-14 2013-12-31 13F AMPHENOL CORP-CL A CMN 032095101 12,291 -27,958 -69.46 1,093 -64.92 0.0050
2013-11-14 2013-09-30 13F AMPHENOL CORP-CL A CMN 032095101 40,249 -10,727 -21.04 3,116 -21.65 0.0187
2013-08-15 2013-06-30 13F AMPHENOL CORP-CL A CMN 032095101 50,976 37,968 291.88 3,977 311.70 0.0323
2013-08-16 2013-03-31 13F/A-2 AMPHENOL CORP-CL A CMN 032095101 13,008 4,278 49.00 966 72.19 0.0102
2013-08-16 2012-12-31 13F/A-1 AMPHENOL CORP-CL A CMN 032095101 8,730 8,730 561 0.0062
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F AMPHENOL CL A Call 301,600 378.73 38,107 347.63 n/a n/a n/a
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A Call 63,000 8,514 n/a n/a n/a
2025-08-18 2025-06-30 13F/A AMPHENOL CORP CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A Call 0 0 n/a n/a n/a
2025-05-15 2025-03-31 13F AMPHENOL CORP CL A Call 70,000 4,591 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F AMPHENOL CORP CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A Put 7,000 946 n/a n/a n/a
2025-08-18 2025-06-30 13F/A AMPHENOL CORP CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A Put 0 0 n/a n/a n/a
2025-05-15 2025-03-31 13F AMPHENOL CORP CL A Put 30,000 1,968 n/a n/a n/a
2021-11-15 2021-09-30 13F AMPHENOL CORP-CL A CMN Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-16 2021-06-30 13F AMPHENOL CORP-CL A CMN Put 20,000 1,367 n/a n/a n/a
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.