Amphenol Corporation
US ˙ NYSE ˙ US0320951017

SecurityAPH / Amphenol Corporation
InstitutionBoothbay Fund Management, Llc
Latest Disclosed Ownership43,329 shares
Latest Disclosed Value $ 5,474,619
Boothbay Fund Management, Llc ownership in APH / Amphenol Corporation

On May 15, 2026 - Boothbay Fund Management, Llc filed a 13F-HR form disclosing ownership of 43,329 shares of Amphenol Corporation (US:APH) valued at $5,474,619 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,833 shares of Amphenol Corporation. This represents a change in shares of 453.16% during the quarter. The current value of the position is $6,014,498 USD.

Boothbay Fund Management, Llc 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 0 of underlying shares valued at $0 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.

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 43,329 35,496 453.16 5,475 417.39 0.0709
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A 032095101 7,833 -101,944 -92.86 1,059 -92.21 0.0158
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A 032095101 109,777 41,581 60.97 13,585 101.72 0.1975
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A 032095101 68,196 64,397 1,695.10 6,734 2,604.42 0.1308
2025-05-15 2025-03-31 13F AMPHENOL CORP CL A 032095101 3,799 -199,181 -98.13 249 -98.23 0.0066
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A 032095101 202,980 -105,752 -34.25 14,097 -29.93 0.3477
2024-11-14 2024-09-30 13F AMPHENOL CORP CL A 032095101 308,732 114,229 58.73 20,117 53.52 0.4575
2024-08-14 2024-06-30 13F AMPHENOL CORP CL A 032095101 194,503 3,160 1.65 13,104 -40.63 0.3103
2024-05-15 2024-03-31 13F AMPHENOL CORP CL A 032095101 191,343 180,571 1,676.30 22,071 1,968.51 0.4250
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A 032095101 10,772 -71,440 -86.90 1,068 -84.55 0.0273
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A 032095101 82,212 82,212 6,905 0.1640
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A 032095101 0 -3,121 -100.00 0 -100.00
2023-05-15 2023-03-31 13F AMPHENOL CORP CL A 032095101 3,121 3,121 255 0.0052
2023-02-14 2022-12-31 13F AMPHENOL CORP CL A 032095101 0 -4,911 -100.00 0 -100.00
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A 032095101 4,911 -5,645 -53.48 329 -51.62 0.0082
2022-08-15 2022-06-30 13F AMPHENOL CORP CL A 032095101 10,556 6,870 186.38 680 144.60 0.0179
2022-05-16 2022-03-31 13F AMPHENOL CORP CL A 032095101 3,686 3,686 278 0.0065
2021-11-15 2021-09-30 13F AMPHENOL CORP CL A 032095101 0 -48,751 -100.00 0 -100.00
2021-08-17 2021-06-30 13F/A-1 AMPHENOL CORP CL A 032095101 48,751 32,351 197.26 3,335 208.23 0.1071
2021-08-16 2021-06-30 13F AMPHENOL CORP CL A 032095101 48,751 32,351 3,335 0.1049
2021-05-17 2021-03-31 13F AMPHENOL CORP CL A 032095101 16,400 9,476 136.86 1,082 19.56 0.0405
2021-02-12 2020-12-31 13F AMPHENOL CORP CL A 032095101 6,924 -476 -6.43 905 12.98 0.0337
2020-11-16 2020-09-30 13F AMPHENOL CORP CL A 032095101 7,400 -14,442 -66.12 801 -61.73 0.0485
2020-08-14 2020-06-30 13F AMPHENOL CORP CL A 032095101 21,842 4,042 22.71 2,093 61.37 0.1431
2020-05-15 2020-03-31 13F AMPHENOL CORP CL A 032095101 17,800 17,800 1,297 0.1075
2019-11-14 2019-09-30 13F AMPHENOL CORP CL A 032095101 0 -29,409 -100.00 0 -100.00
2019-08-14 2019-06-30 13F AMPHENOL CORP CL A 032095101 29,409 29,409 2,821 0.2566
2017-11-14 2017-09-30 13F AMPHENOL CL A 032095101 0 -3,059 -100.00 0 -100.00
2017-08-14 2017-06-30 13F AMPHENOL CL A 032095101 3,059 3,059 226 0.0470
2017-02-16 2016-12-31 13F/A-1 Amphenol EQUITIES 032095101 0 -4,300 -100.00 0 -100.00 0.0000
2016-11-14 2016-09-30 13F Amphenol EQUITIES 032095101 4,300 4,300 0 0.0868
2015-11-16 2015-09-30 13F AMPHENOL CORP CL A 032095101 0 -4,207 -100.00 0 -100.00
2016-06-09 2015-06-30 13F/A-3 AMPHENOL CORP CL A 032095101 4,207 4,207 244 1.2068
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 CORP CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A Call 41,700 5,635 n/a n/a n/a
2024-05-15 2024-03-31 13F AMPHENOL CORP CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-14 2023-12-31 13F AMPHENOL CORP CL A Call 54,900 -24.28 5,442 -10.63 n/a n/a n/a
2023-11-14 2023-09-30 13F AMPHENOL CORP CL A Call 72,500 107.14 6,089 104.81 n/a n/a n/a
2023-08-14 2023-06-30 13F AMPHENOL CORP CL A Call 35,000 4.48 2,973 8.62 n/a n/a n/a
2023-05-15 2023-03-31 13F AMPHENOL CORP CL A Call 33,500 -25.72 2,738 -20.27 n/a n/a n/a
2023-02-14 2022-12-31 13F AMPHENOL CORP CL A Call 45,100 3,434 n/a n/a n/a
2022-11-14 2022-09-30 13F AMPHENOL CORP CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F AMPHENOL CORP CL A Call 46,700 16.46 3,007 -0.50 n/a n/a n/a
2022-05-16 2022-03-31 13F AMPHENOL CORP CL A Call 40,100 3,022 n/a n/a n/a
2017-07-18 2016-03-31 13F/A AMPHENOL CORP CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-07-18 2015-12-31 13F/A AMPHENOL CORP CL A Call 14,500 757 n/a n/a n/a
2016-02-16 2015-12-31 13F AMPHENOL CORP CL A Call 11,600 606 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
(%)
2026-02-17 2025-12-31 13F AMPHENOL CORP CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F AMPHENOL CORP CL A Put 7,200 -86.84 891 -83.50 n/a n/a n/a
2025-08-14 2025-06-30 13F AMPHENOL CORP CL A Put 54,700 5,402 n/a n/a n/a
2025-02-14 2024-12-31 13F AMPHENOL CORP CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F AMPHENOL CORP CL A Put 90,200 5,877 n/a n/a n/a
2024-08-14 2024-06-30 13F AMPHENOL CORP CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F AMPHENOL CORP CL A Put 98,500 11,362 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.