AMPHENOL CORPORATION

Amphenol Corporation is listed on the New York Stock Exchange under the ticker APH, so its shareholder base is disclosed only to the extent required under U.S. securities law: principally through Schedule 13D/13G filings covering holders of more than 5% of outstanding common stock, together with the beneficial-ownership table in the company’s own annual proxy statement (Form DEF 14A). This is a major-shareholders-only disclosure; the great majority of Amphenol’s outstanding shares are held by dispersed public and institutional shareholders who are not individually named in company filings.

According to Amphenol Corporation’s definitive proxy statement for its 2026 annual meeting, which lists beneficial ownership as of March 23, 2026, the disclosed holders of more than 5% of the common stock were BlackRock, Inc., with 97,700,524 shares (8.0% of class), based on a Schedule 13G/A filed on January 25, 2024, and FMR LLC together with Abigail P. Johnson, with 86,361,390 shares (7.0% of class), based on a Schedule 13G/A filed on February 5, 2026. The Vanguard Group had previously reported 125,227,087 shares (10.2% of class) in a Schedule 13G/A filed on October 30, 2025, but on March 26, 2026 it filed a further amendment stating that, following an internal realignment, it no longer beneficially owns any shares of Amphenol common stock; the company’s proxy statement notes that this stock will instead be reported, on a disaggregated basis, by two Vanguard-owned investment advisers, Vanguard Capital Management and Vanguard Portfolio Management.

All of the disclosed 5%-plus holders are institutional investment managers reporting passive investment positions rather than individuals, and none of the filings identifies a natural person exercising control of the kind associated with beneficial-ownership regimes for privately held companies. No verified ultimate beneficial owner has been identified for Amphenol Corporation.

Shareholder information for Amphenol Corporation is available only on a major-shareholders basis, reflecting U.S. securities-law disclosure thresholds for a New York Stock Exchange-listed company. Reported percentages reflect each filer’s most recent Schedule 13G/A as referenced in the company’s 2026 proxy statement and are subject to change between filings.

Amphenol Corporation’s current senior officers include R. Adam Norwitt (President and Chief Executive Officer), Craig A. Lampo (Executive Vice President and Chief Financial Officer), and Lance E. D’Amico (Executive Vice President, Secretary and General Counsel), along with other senior vice presidents responsible for functions such as human resources. The underlying registry record does not include appointment or resignation dates for these positions, and no officer is recorded as resigned or terminated. Nationality is not disclosed for any of these officers in either the Texas Secretary of State filing or the company’s SEC disclosures; the registry record shows only a U.S. business correspondence address for certain officers, and this address is a correspondence address rather than evidence of an individual’s personal residence or nationality.

Effective May 21, 2026, at Amphenol’s 2026 Annual Meeting of Stockholders, R. Adam Norwitt was appointed to the additional role of Chairman of the Board while continuing as President and Chief Executive Officer, succeeding Martin H. Loeffler, who retired from the Board on the same date after serving as Chairman since 1997. The leadership succession was first announced by the company on February 4, 2026 and took effect as previously disclosed at the May 2026 annual meeting.

Officer information for Amphenol Corporation is available primarily through its U.S. Securities and Exchange Commission filings and annual proxy statements, which do not disclose officers’ personal nationality or country of residence; the underlying company registry record reflects a Texas Secretary of State foreign-qualification filing that lists current officers without appointment or resignation dates.

Amphenol Corporation is a publicly traded company and is not itself a subsidiary of another corporate entity; it is the ultimate parent of a global group of manufacturing, sales and engineering subsidiaries operating under the Amphenol name and a number of acquired brand names. The company’s Form 10-K for the year ended December 31, 2025 lists several hundred subsidiaries in its Exhibit 21.1, organized across the United States, China, Germany, France, the United Kingdom and dozens of other countries in North America, Europe, Asia-Pacific, Latin America and the Middle East, reflecting Amphenol’s long-standing strategy of growth through acquisition.

Ownership of these subsidiaries is not broken down by percentage in Amphenol’s public filings. Exhibit 21.1 identifies each subsidiary’s name and jurisdiction of organization but does not disclose the percentage of voting or economic interest held by Amphenol Corporation or by an intermediate subsidiary in each entity, so specific ownership percentages are not disclosed. Recent additions to the group include businesses acquired from CommScope Holding Company, Inc. — the Andrew antenna and cable-assembly business, completed in the first quarter of 2025; the Outdoor Wireless Networks (OWN) and Distributed Antenna Systems (DAS) businesses; and, most recently, the Connectivity and Cable Solutions (CCS) business, which closed on January 12, 2026 — together with the approximately $1 billion acquisition of Trexon from Audax Private Equity, completed in November 2025.

Group-structure information for Amphenol Corporation is best described as partial: the identities and jurisdictions of subsidiaries are disclosed through SEC filings, but ownership percentages, voting control and intermediate holding relationships are generally not publicly itemized.