PROPOSAL 1. ELECTION OF DIRECTORS

        The Restated Certificate of Incorporation and the By-Laws of the Company, taken together, provide for a Board consisting of not less than three or more than 15 directors. Currently, the number of directors of the Company is nine.

        Our directors are elected annually. Accordingly, action will be taken at the Annual Meeting for the re-election of nine directors: Stanley L. Clark, John D. Craig, David P. Falck, Edward G. Jepsen, Rita S. Lane, Robert A. Livingston, Martin H. Loeffler, R. Adam Norwitt and Anne Clarke Wolff for a term of one year that will expire at the 2022 Annual Meeting.

        It is intended that the proxies delivered pursuant to this solicitation will be voted in favor of the election of each director nominee, except in cases of proxies bearing contrary instructions. In the event that any of these nominees should become unavailable for election for any presently unforeseen reason, the persons named in the proxy will have the right to use their discretion to vote for a substitute.

        Information regarding each director nominee, including individual experience, qualifications, attributes and skills that led the Board to conclude that the director should serve on the Board, is set forth below. The Company's goal is to assemble a Board that works together and with management to deliver long-term shareholder value. The Company believes that the nominees and directors set forth below, each of whom is currently a director of the Company, possess the skills and experience necessary to guide the

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Company in the best interests of its stockholders. The Company's current Board consists of individuals with proven records of success in their chosen professions and with the Company. They all have high integrity and keen intellect. They are collegial yet independent in their thinking, and have demonstrated the willingness to make the time commitment necessary to be informed about the Company and its relevant industry, including its customers, suppliers, competitors, stockholders and management. Members of the Board also have extensive experience in leadership, the management of public companies, risk assessment and management, accounting and finance, capital markets, sustainability, mergers and acquisitions, supply chain, technology and global business practices and operations.

        The following information details offices held and other business directorships of public companies during the past five years of each of the proposed director nominees. Beneficial ownership of equity securities of the current directors and the proposed director nominees is shown under the caption Security Ownership of Management on page 5.

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THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR EACH OF THE
NOMINEES FOR ELECTION TO THE BOARD OF DIRECTORS.

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THE BOARD OF DIRECTORS AND THE COMMITTEES OF THE BOARD

Governance Principles

        Amphenol's Corporate Governance Principles meet or exceed the Listing Standards of the New York Stock Exchange (the "NYSE Listing Standards"), including guidelines for determining director independence and reporting concerns to non-employee directors and the Audit Committee. The Company's most current Governance Principles, the Code of Business Conduct and Ethics and the Charters of the Audit Committee, the Compensation Committee and the Nominating/Corporate Governance Committee are reviewed at least annually and revised as warranted. Amphenol's Code of Business Conduct and Ethics applies to all employees, directors and officers of the Company and its subsidiaries.

        The Company posts the following documents on its website at www.amphenol.com under the heading "Investors", then "Governance", and then "Governance Documents":

Code of Business Conduct and Ethics
Corporate Governance Principles
Global Human Rights Policy
Political Activity Statement
Stock Ownership Guidelines—Directors
Stock Ownership Guidelines—Executives

        The Company posts the following charters for its board committees on its website at www.amphenol.com under the heading "Investors", then "Governance", and then "Board of Directors":

Audit Committee Charter
Compensation Committee Charter
Executive Committee Charter
Nominating/Corporate Governance Committee Charter
Pension Committee Charter

        A printed copy of any of these documents will be provided to any stockholder of the Company free of charge upon written request to the Company, c/o Secretary, Amphenol Corporation, 358 Hall Avenue, Wallingford, Connecticut 06492.

Director Independence

        The Board has adopted the definition of "independent director" set forth in the NYSE Listing Standards to assist it in making determinations of independence. In addition to applying these guidelines, the Board will consider all relevant facts and circumstances in making an independence determination.

        At the time, the Board considered Ms. Wolff's then role as Chairman Global Corporate and Investment Banking at Bank of America ("BofA") and the Company's current financial relationships with BofA, including BofA's role as a lender under the Company's revolving credit facility, participation as an underwriter on certain of the Company's debt offerings and provider of traditional banking services including cash management and trading, and determined that these relationships did not impair her independence. Ms. Wolff is no longer affiliated with BofA. The Board has determined that all of the directors are independent of the Company and its management with the exception of Mr. Norwitt who is considered an inside director because of his current employment with the Company.

Leadership Structure

        Mr. Loeffler is Chairman of the Board and Mr. Falck is the Board's Presiding Director. As Presiding Director, Mr. Falck has the authority to call, schedule and chair executive sessions of the independent directors. After each Board meeting and executive session the Chairman and Presiding Director

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communicate with the Chief Executive Officer to provide feedback and to effectuate the decisions and recommendations of the directors.

        The Board of Directors has determined that at the present time, its current leadership structure, including a Presiding Director, a Chairman of the Board who retired from employment with the Company in 2010 after 37 years of service and a Chief Executive Officer who is an inside director, is appropriate and allows the Board to fulfill its duties effectively and efficiently based on the Company's current needs. The Presiding Director and independent Chairman of the Board provide a means for the Board to effectively operate independently of the Company's management as necessary or desirable. This structure also allows the Board to draw upon the skills and extensive experience of a Chairman, who can ensure that the other directors' attention is devoted to the issues of greatest importance to the Company and its stockholders, while permitting the Chief Executive Officer to continue to set the strategic direction and drive the ongoing business operations and finances of the Company, all in consultation with the Board of Directors.

Committees

        The Board has five standing committees: the Audit Committee, the Compensation Committee, the Executive Committee, the Pension Committee and the Nominating/Corporate Governance Committee. The Board has determined that all the members of the Audit Committee, the Compensation Committee and the Nominating/Corporate Governance Committee are independent and satisfy the relevant SEC and

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the New York Stock Exchange independence requirements for the members of such committees. The Board has determined that all members of the Executive Committee and the Pension Committee are independent.

        Audit Committee.     The Audit Committee operates under a written charter adopted by the Board. As described more fully in its charter, the principal oversight duties of the Audit Committee include the following: (1) review reports on the evaluation of the Company's internal controls for financial reporting and the Company's annual audited and quarterly unaudited financial statements and related disclosures therein under "Management's Discussion and Analysis of Financial Condition and Results of Operations"; (2) review the Company's earnings press releases; (3) select, engage, evaluate and replace, if deemed necessary, the independent auditors and approve all audit engagement fees and terms and pre-approve all permissible tax and other non-audit services; (4) review the qualifications, performance and independence of the Company's independent auditors; (5) review and approve the scope of the annual audit of the Company's financial statements; (6) review the scope and coverage of the Company's internal audit plan; (7) review the results of internal audits and the procedures for maintaining internal controls; (8) review the integrity of the Company's financial reporting processes and the selection and quality of the Company's accounting principles; (9) review critical accounting principles and practices and applicable legal and regulatory standards and principles and their effect on the financial statements of the Company; (10) review significant audit issues identified by the Company's internal audit function or the Company's independent auditors and the Company's responses thereto; (11) review accounting adjustments noted or proposed by the Company's independent auditors, reports on the Company's internal controls, and material written communications with the independent auditors; (12) review and discuss the Company's guidelines and policies for risk assessment and management; (13) assist the Board in fulfilling its responsibility for oversight of cybersecurity-related matters; (14) establish Company hiring policies for employees of the Company's independent auditors; (15) establish procedures for the receipt, retention and treatment of employee concerns regarding questionable accounting or auditing matters; and (16) sustain a constructive dialogue with the independent auditors about significant matters relevant to the audit of the financial statements of the Company and of internal control over financial reporting, including communications regarding critical audit matters expected to be described in the auditor's report. See also Report of the Audit Committee on page 24. The Audit Committee conducts an annual performance self-evaluation, the results of which it reports to the Board. The members of the Audit Committee are David P. Falck, Edward G. Jepsen (Chairman), Robert A. Livingston and Anne Clarke Wolff, each of whom is an independent director as defined under the NYSE Listing Standards. The Board of Directors has determined that Messrs. Jepsen and Livingston and Ms. Wolff are audit committee financial experts as defined by the applicable rules of the SEC and the NYSE Listing Standards, and that each of the members of the Audit Committee is sufficiently proficient in reading and understanding the Company's financial statements to serve on the Audit Committee.

        Compensation Committee.     The Compensation Committee establishes the principles related to the compensation programs of the Company. It approves compensation guidelines, reviews the role and performance of executive officers and key management employees of the Company and its subsidiaries, approves the base compensation, incentive plan target and award and the allocation of stock option awards, if any, for the Chief Executive Officer and reviews and approves the recommendations of the Chief Executive Officer for base compensation and adjustments in base compensation, incentive plan targets and allocations and stock option awards, if any, for the direct reports to the Chief Executive Officer as well as the Company's other top 20 most highly compensated employees. See also the Compensation Discussion and Analysis on page 27 and the Compensation Committee Report on page 38. The Compensation Committee also oversees the compensation of the Board. The Compensation Committee has the authority to retain and solicit the advice of compensation advisors. The Compensation Committee conducts an annual performance self-evaluation, the results of which it reports to the Board. The members of the Compensation Committee are Stanley L. Clark (Chairman), John D. Craig, David P. Falck, and Robert A. Livingston.

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        Executive Committee.     The Executive Committee is empowered to exercise the powers and authority of the Board during the intervals between meetings of the Board. Notwithstanding the foregoing, the Executive Committee does not have power or authority to: (1) approve any transactions or expenditures in an amount exceeding $50 million; (2) amend the Company's Charter or Bylaws; (3) adopt an agreement or plan of merger, share exchange, or consolidation to which the Company is a party; (4) recommend to the stockholders any action that requires stockholder approval including, but not limited to, (a) the sale, lease, or exchange of all or substantially all of the Company's property or assets or (b) a dissolution of the Company or a revocation of a dissolution of the Company; (5) remove any executive officer from his or her position, or appoint any new executive officer, (6) declare a dividend or authorize the issuance of capital stock of the Company; or (7) take any other action or exercise any authority prohibited by law or the Company's Charter or Bylaws. The Executive Committee meets as necessary and all actions of the Committee are presented to the full Board at the next meeting of the Board. The Executive Committee conducts an annual performance self-evaluation, the results of which it reports to the Board. The members of the Executive Committee are John D. Craig (Chairman), Edward G. Jepsen and Robert A. Livingston.

        Nominating/Corporate Governance Committee.     The Nominating/Corporate Governance Committee's principal duties include the following: (1) assisting the Board in identifying appropriate individuals qualified to serve as directors of the Company and evaluating the qualifications of such individuals; (2) recommending to the Board for selection qualified candidates for all directorships to be filled by the Board or by the stockholders; (3) developing and recommending to the Board a set of corporate governance guidelines applicable to the Company; (4) overseeing and discussing, as necessary and appropriate, a plan for the continuity and development of senior management of the Company and (5) assisting the Board in fulfilling its oversight of relevant sustainability and corporate social responsibility policies, strategies and programs. The Nominating/Corporate Governance Committee conducts an annual performance self-evaluation, the results of which it reports to the Board. The Nominating/Corporate Governance Committee also oversees the annual evaluation of the Board. The members of the Nominating/Corporate Governance Committee are Stanley L. Clark, David P. Falck (Chairman) and Anne Clarke Wolff.

        Pension Committee.     The Pension Committee administers the Company's various defined contribution 401(k) plans and the U.S. pension plan (the "Pension Plan"—for more information on the Pension Plan, see the section entitled Pensions and Deferred Compensation beginning on page 44). The Pension Committee has oversight responsibility for funding and investments in the U.S. pension plan and consults with the Chief Financial Officer and the Treasurer of the Company at least annually and with the actuarial consultants and other advisors and the trustee and investment managers of the assets of the Company's U.S. pension plan as it deems necessary and appropriate. The Pension Committee reviews the liabilities, assets and investments of the Company's U.S. pension plan as a Committee at least semi-annually. It also ensures there is an appropriate selection of diverse investments for employees of the Company participating in the various defined contribution 401(k) plans. The Pension Committee conducts an annual performance self-evaluation, the results of which it reports to the Board. The members of the Pension Committee are Stanley L. Clark, John D. Craig, Edward G. Jepsen and Anne Clarke Wolff (Chairman).

Director Selection Process; Board Diversity

        The Nominating/Corporate Governance Committee will consider candidates for Board membership suggested by its members and other Board members, as well as by management and stockholders. A stockholder may recommend any person for consideration as a nominee for director by writing to the Nominating/Corporate Governance Committee, c/o Secretary, Amphenol Corporation, 358 Hall Avenue, Wallingford, CT 06492. Recommendations must be received by December 31, 2021 to be considered for inclusion in the proxy statement for the 2022 Annual Meeting of Stockholders, and must comply with the requirements in the Company's by-laws. Recommendations must include the name and address of the

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stockholder making the recommendation, a representation that the stockholder is a holder of record of Common Stock, biographical information about the individual recommended and any other information the stockholder believes would be helpful to the Nominating/Corporate Governance Committee in its evaluation of the individual being recommended by the stockholder as a nominee for director.

        Potential candidates for the Board will be evaluated by the Nominating/Corporate Governance Committee on the basis of:

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character, judgment, personal and professional ethics, integrity and values;



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business, financial and/or other applicable experience;



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familiarity with national and international issues affecting the Company's business;



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depth of experience, skills and knowledge complementary to the Board and the Company's business; and



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ability and willingness to devote sufficient time to effectively carry out the duties and responsibilities of a director of the Company.

        The Board believes it functions most effectively when comprised of a diverse set of members, including a healthy mix of short-, mid- and long-serving members. To that end, the Board is committed to a policy of regular refreshment and has regularly engaged a reputable international search firm to identify appropriate candidates. During the last four years, we have added four new independent members to our Board including John Craig, the retired Chief Executive Officer of Enersys, Anne Clarke Wolff, the former Chairman of Global Corporate and Investment Banking of Bank of America, Robert Livingston, the retired Chief Executive Officer of Dover Corporation and Rita Lane, the retired Vice President of Operations of Apple Inc.

        Our Board also believes that diversity includes diversity in terms of background, skills, age, experience, and expertise, as well as gender, race, ethnicity and culture. To the extent used, search firms retained by the Nominating/Corporate Governance Committee to assist in identifying qualified candidates are specifically advised to include diverse candidates from traditional and non-traditional environments, including women and minorities (e.g., the "Rooney Rule"). The Nominating/Corporate Governance Committee may also consider such other relevant factors as it deems appropriate. It will make a recommendation to the full Board as to any persons it believes should be nominated by the Board, and the Board will determine the nominees after considering the recommendation and report of the Nominating/Corporate Governance Committee. The process for considering candidates recommended by a stockholder for Board membership will be no different than the process for candidates recommended by members of the Nominating/Corporate Governance Committee, other members of the Board or management. In connection with the identification and appointment of Mr. Craig, Ms. Wolff, Mr. Livingston and Ms. Lane, the Board engaged a reputable international search firm, and in each case considered a slate of diverse candidates. Of our nine current directors, one was born outside of the United States and one identifies as either (i) an under-represented minority (Black or African American, Hispanic or Latinx, Asian, Native American or Alaska Native, Native Hawaiian or Pacific Islander, or two or more Races or Ethnicities) or (ii) LGBTQ+. Two of our current directors are women.

Meetings of the Board and Committees

        During 2020 there were nine formal meetings of the Board. All directors participated in all meetings of the Board and the Committees on which they served in 2020. Directors also attended meetings as invited guests of Committees on which they did not serve. This included quarterly telephonic meetings of the Audit Committee during which quarterly results were discussed and quarterly press releases reporting operating results were reviewed and approved.

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        The independent directors of the Company meet in executive session as necessary. Such private meetings are currently presided over by the Chairman of the Board, the Presiding Director, the chairman of the committee or by the director who requests the opportunity to meet in executive session.

        The full Board conducts a self-evaluation at least annually to determine whether it and its committees are functioning effectively. The full Board meets at least annually with the Audit Committee, the Compensation Committee, the Executive Committee, the Nominating/Corporate Governance Committee and the Pension Committee to review and discuss each committee's self-evaluation, including its performance as measured against its charter and the continuing effectiveness of its charter. In particular, the Board discusses with the Nominating/Corporate Governance Committee the corporate governance guidelines that it is responsible for developing and recommending to the Board.

Risk Oversight

        The Board is actively involved in overseeing risk management for the Company. This oversight is conducted both directly and through the committees of the Board. At each regularly scheduled quarterly meeting of the Board, the Board reviews various risks facing the Company at such time.

        The Audit Committee reviews the Company's portfolio of risk with management and the Company's independent public accountants, discusses with management significant financial risks, the Company's policies with respect to risk assessment and risk management and the actions management has taken to limit, monitor and control financial and other risk exposures. The Audit Committee also reviews the Company's internal system of audit and financial controls and the process for maintaining financial reporting controls with management and the Company's independent public accountants. The Committee also assists the Board in fulfilling its responsibility for oversight of cybersecurity-related matters, which are reviewed as appropriate at each regularly scheduled quarterly meeting of the Board.

        The Compensation Committee oversees risk management as it relates to compensation plans, policies and practices in connection with structuring the Company's executive compensation programs and incentive compensation programs for other employees. The Compensation Committee reviews with management whether the compensation programs, including the performance-based incentive plans and the stock option plans described in the section entitled Elements of Compensation Program beginning on page 29, are reasonably likely to create incentives for employees that may cause such employees to take excessive or inappropriate risks which could have a material adverse effect on the Company. The Compensation Committee and management have concluded the Company's compensation programs are not reasonably likely to create incentives for employees that may cause such employees to take excessive or inappropriate risks which could have a material adverse effect on the Company.

        The Nominating/Corporate Governance Committee oversees risk management as it relates to executive and senior management continuity and development as well as political activity. It also assists the Board in fulfilling its oversight of relevant sustainability and corporate social responsibility policies, strategies and programs.

        The Pension Committee oversees risk management as it relates to the Company's U.S. pension plan described beginning on page 44. The Pension Committee reviews with management the forecasted liabilities of the U.S. pension plan, the actuarial assumptions used in determining those liabilities, the investments funding those anticipated obligations, the periodic performance of those investments and, as necessary, reviews and recommends revisions to the general investment policies governing the investment of the assets of such pension plan. The Pension Committee also has responsibility for ensuring there is an appropriate selection of diverse investments for those employees participating in the various defined contribution, 401(k) plans sponsored by the Company.

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Human Capital Management and Culture Oversight

        The Board is actively involved in overseeing the Company's human capital management strategies and practices as well as the Company's culture. This oversight is conducted both directly and through certain of the Board's committees. At each regularly scheduled quarterly meeting, the Board reviews changes in key personnel and regularly discusses various HR-related topics with management, including the Company's Senior Vice President, Human Resources, including talent development, succession planning and culture. The Board believes that the Company's culture has been a critical component of the Company's success. The Board has primary responsibility for succession planning for the CEO. The Nominating/Corporate Governance Committee has primary responsibility for succession planning for other executives and senior management as well as their ongoing development. The Compensation Committee has primary responsibility for executive and company-wide compensation policies and programs.

        The Board emphasizes the importance of diversity, equity and inclusion; positive community and social impact; and the health, safety and well-being of the Company's employees. Particularly in connection with the COVID-19 pandemic, the Board remained informed through frequent informal updates regarding the additional actions taken by the Company to protect the physical and mental health and well-being of our employees throughout the world, including in particular those employees who work in our factories.