Proxy Statement

Eaton Vance Enhanced Equity Income Fund II

Eaton Vance Risk-Managed Diversified Equity Income Fund

Eaton Vance Tax-ManagedBuy-Write Income Fund

Eaton Vance Tax-ManagedBuy-Write Opportunities Fund

Eaton Vance Tax-Managed Global Buy-Write Opportunities Fund

One Post Office Square

Boston, Massachusetts 02109

PROXY STATEMENT

This proxy statement is furnished in connection with the solicitation of proxies by the Board of Trustees of Eaton Vance Enhanced Equity Income Fund II (the "Enhanced Equity Fund"), Eaton Vance Risk-Managed Diversified Equity Income Fund (the "Risk-Managed Fund"), Eaton Vance Tax-ManagedBuy-Write Income Fund (the "Buy-Write Income Fund"), Eaton Vance Tax-ManagedBuy-Write Opportunities Fund (the "Buy-Write Opportunities Fund") and Eaton Vance Tax-Managed Global Buy-Write Opportunities Fund (the "Global Buy-Write Opportunities Fund") (collectively, the "Funds"). The proxies will be voted at the Annual Meeting of Shareholders of each Fund and at any adjournments or postponements thereof (the "Annual Meeting"). The Annual Meeting will be held on Wednesday, April 10, 2024 at 11:30 a.m. (EasteTime) at the principal office of each Fund, One Post Office Square, Boston, Massachusetts 02109, as discussed further herein. The Annual Meeting will be held for the purposes set forth in the accompanying notice. This proxy statement and the enclosed proxy cards are first being sent or given to shareholders on or about February 23, 2024.

The Board of Trustees of each Fund (the "Board" or the "Board of Trustees") has fixed the close of business on January 30, 2024 as the record date for the determination of the shareholders entitled to notice of and to vote at the Annual Meeting and any adjournments or postponements thereof. The number of common shares of beneficial interest, $0.01 par value per share ("Common Shares"), of each Fund outstanding on January 30, 2024, were as follows:

Each Fund will vote separately on each proposal; votes of multiple Funds will not be aggregated.

As of January 30, 2024, to each Fund's knowledge: (i) no shareholder owned more than 5% of the outstanding Common Shares of the Fund; and (ii) the Trustees and officers of the Fund, individually and as a group, owned beneficially less than 1% of the outstanding Common Shares of the Fund.

Shareholders as of the close of business on the record date of January 30, 2024, who have voting power with respect to such shares, are entitled to attend and vote at the Annual Meeting. All properly executed proxies received prior to the Annual Meeting will be voted at the Annual Meeting. Each proxy will be voted in accordance with its instructions; if no instruction is given, an executed proxy will authorize the persons named on the respective proxy card enclosed as proxies, or any of them, to vote FOR the election of each Trustee. An executed proxy delivered to a Fund is revocable by the person giving it, prior to its exercise, by a signed writing filed with the Fund's Secretary, by executing and delivering a later dated proxy, or by attending the Annual Meeting and voting the shares at the Annual Meeting. Merely attending the Annual Meeting will not revoke a previously executed proxy. If you hold Fund shares through an intermediary (such as a broker, bank, adviser or custodian), please consult with the intermediary regarding your ability to revoke voting instructions after they have been provided.

If you are a record holder of Fund shares and plan to attend the Annual Meeting, you must show a valid photo identification (such as a driver's license) to gain admission to the Annual Meeting. Please call 1-800-262-1122 for information on how to obtain directions to be able to attend and vote at the Annual Meeting.

If you hold Fund shares through an intermediary and plan to attend and vote at the Annual Meeting, you will be required to show a valid photo identification and your authority to vote your shares (referred to as a "legal proxy") to gain admission to the Annual Meeting. As described above, you must contact your intermediary to obtain a legal proxy for your shares.

PROPOSAL 1. ELECTION OF TRUSTEES

Each Fund's Agreement and Declaration of Trust provides that a majority of the Trustees shall fix the number of the entire Board and that such number shall be at least two and no greater than fifteen. Each Board has fixed the number of Trustees at eleven. Under the terms of each Fund's Agreement and Declaration of Trust, the Board of Trustees is divided into three classes, each class having a term of three years to expire on the date of the third Annual Meeting following its election. Thus, this could delay for up to two years the replacement of a majority of the Board.

Proxies will be voted for the election of the following nominees:

1. For Enhanced Equity Fund and Risk-Managed Fund, four Class II Trustees, Alan C. Bowser, George J. Gorman, Susan J. Sutherland and Nancy A. Wiser, to be elected by shareholders of each Fund; and
2. For Buy-Write Income Fund, Buy-Write Opportunities Fund and Global Buy-Write Opportunities Fund, three Class I Trustees, Cynthia E. Frost, Scott E. Wennerholm and Nancy A. Wiser, to be elected by shareholders of each Fund.

The Board of Trustees recommends that shareholders vote FOR the election of the Trustee nominees of each Fund.

Each nominee is currently serving as a Trustee of his or her respective Fund and has consented to continue to so serve. In the event that a nominee is unable to serve for any reason (which is not now expected) when the election occurs, the accompanying proxy will be voted for such other person or persons as the Board of Trustees may recommend. Election of Trustees is non-cumulative. Shareholders do not have appraisal rights in connection with the proposal in this proxy statement.

Each nominee shall be elected by the affirmative vote of a plurality of the shares of the Fund entitled to vote. Proxies cannot be voted for a greater number of persons than the number of nominees named. No nominee is a party adverse to his or her respective Fund or any of its affiliates in any material pending legal proceeding, nor does any nominee have an interest materially adverse to such Fund.

The following table presents certain information regarding the current Trustees of each Fund, including the principal occupations of each such person for at least the last five years. References below to "EOS" are to Enhanced Equity Fund, to "ETJ" are to Risk-Managed Fund, to "ETB" are to Buy-Write Income Fund, to "ETV" are to Buy-Write Opportunities Fund and to "ETW" are to Global Buy-Write Opportunities Fund. Information in the table below about a Trustee's position with a Fund, the period as a Trustee and the current term of each Trustee are for each Fund unless otherwise noted.

1. Year first appointed to serve as Trustee for a fund in the Eaton Vance family of funds. Each Trustee has served continuously since appointment unless indicated otherwise.

Each current Trustee listed above served as a Trustee of 127 funds within the Eaton Vance fund complex as of January 30, 2024 (including both funds and portfolios in a hub and spoke structure). The address of each Trustee is One Post Office Square, Boston, Massachusetts 02109.

Each Trustee holds office until the Annual Meeting for the year in which his or her term expires and until his or her successor is elected and qualified, subject to a prior death, resignation, retirement, disqualification or removal. Under the terms of each Fund's current Trustee retirement policy, an Independent Trustee must retire and resign as a Trustee on the earlier of: (i) the first day of July following his or her 74th birthday; or (ii), with limited exception, December 31st of the 20th year in which he or she has served as a Trustee. However, if such retirement and resignation would cause a Fund to be out of compliance with Section 16 of the Investment Company Act of 1940, as amended (the "1940 Act"), or any other regulations or guidance of the Securities and Exchange Commission ("SEC"), then such retirement and resignation will not become effective until such time as action has been taken for a Fund to be in compliance with Section 16 of the 1940 Act and any other regulations or guidance of the SEC.

Interested Trustee

Ms. Pachnanda is an "interested person" (as defined in the 1940 Act) because of her position with MSIM, which is an affiliate of the investment adviser to each Fund.

Share Ownership by Trustee

As of January 30, 2024, no Trustee beneficially owned a Fund's equity securities. The following table shows, as of January 30, 2024, the dollar range of equity securities beneficially owned by each Trustee in all registered investment companies advised or administered by Eaton Vance (the "Eaton Vance family of funds") overseen by the Trustee, which may include shares, if any, deemed to be beneficially owned by a noninterested Trustee through a deferred compensation plan.

1. Ms. Pachnanda began serving as a Trustee effective April 1, 2023.

Board Meetings and Committees

The Board has general oversight responsibility with respect to the business and affairs of each Fund. The Board has engaged an investment adviser and (if applicable) a sub-adviser (collectively, the "adviser") to manage each Fund. The Funds' investment adviser also serves as administrator of each Fund. The Board is responsible for overseeing such adviser and administrator and other service providers to the Fund. The Board is currently composed of eleven Trustees, including ten Trustees who are not "interested

persons" of a Fund, as that term is defined in the 1940 Act (each a "noninterested Trustee"). In addition to six regularly scheduled meetings per year, the Board holds special meetings or informal conference calls to discuss specific matters that may require action prior to the next regular meeting. As discussed below, the Board has established six committees to assist the Board in performing its oversight responsibilities.

The Board has appointed a noninterested Trustee to serve in the role of Chairperson. The Chairperson's primary role is to participate in the preparation of the agenda for meetings of the Board and the identification of information to be presented to the Board with respect to matters to be acted upon by the Board. The Chairperson also presides at all meetings of the Board and acts as a liaison with service providers, officers, attorneys, and other Board members generally between meetings. The Chairperson may perform such other functions as may be requested by the Board from time to time. In addition, the Board may appoint a noninterested Trustee to serve in the role of Vice-Chairperson. The Vice-Chairperson has the power and authority to perform any or all of the duties and responsibilities of the Chairperson in the absence of the Chairperson and/or as requested by the Chairperson. Except for any duties specified herein or pursuant to each Fund's Declaration of Trust or By-Laws, the designation of Chairperson or Vice-Chairperson does not impose on such noninterested Trustee any duties, obligations or liability that is greater than the duties, obligations or liability imposed on such person as a member of the Board, generally.

Each Fund is subject to a number of risks, including, among others, investment, compliance, operational, and valuation risks. Risk oversight is part of the Board's general oversight of each Fund and is addressed as part of various activities of the Board and its Committees. As part of its oversight of each Fund, the Board directly, or through a Committee, relies on and reviews reports from, among others, Fund management, the adviser/administrator, the principal underwriter, the Chief Compliance Officer (the "CCO"), and other Fund service providers responsible for day-to-day oversight of Fund investments, operations and compliance to assist the Board in identifying and understanding the nature and extent of risks and determining whether, and to what extent, such risks can or should be mitigated. The Board also interacts with the CCO and with senior personnel of the adviser/administrator, the principal underwriter and other Fund service providers and provides input on risk management issues during meetings of the Board and its Committees. Each of the adviser/administrator, the principal underwriter and the other Fund service providers has its own independent interest and responsibilities in risk management, and its policies and methods for carrying out risk management functions will depend, in part, on its individual priorities, resources and controls. It is not possible to identify all of the risks that may affect a Fund or to develop processes and controls to eliminate or mitigate their occurrence or effects. Moreover, it is necessary to bear certain risks (such as investment-related risks) to achieve a Fund's goals.

The Board, with the assistance of management and with input from the Board's various committees, reviews investment policies and risks in connection with its review of Fund performance. The Board has appointed a Fund CCO who oversees the implementation and testing of each Fund's compliance program and reports to the Board regarding compliance matters for the Funds and their principal service providers. In addition, as part of the Board's periodic review of the advisory, subadvisory (if applicable), distribution and other service provider agreements, the Board may consider risk management aspects of their operations and the functions for which they are responsible. With respect to valuation, the Board approves and periodically reviews valuation policies and procedures applicable to valuing each Fund's shares. The administrator and the adviser are responsible for the implementation and day-to-day administration of these valuation policies and procedures and provide reports to the Audit Committee of the Board and the Board regarding these and related matters. In addition, the Audit Committee of the Board or the Board receives reports periodically from the independent public accounting firm for each Fund regarding tests performed by such firm on the valuation of all securities, as well as with respect to other risks associated with registered investment companies. Reports received from service providers, legal counsel and the independent public accounting firm assist the Board in performing its oversight function.

Each Fund's By-Laws set forth specific qualifications to serve as a Trustee. The Charter of the Governance Committee also sets forth certain factors that the Committee may take into account in considering noninterested Trustee candidates. In general, no one factor is decisive in the selection of an individual to join the Board. Among the factors the Board considers when concluding that an individual should serve on the Board are the following: (i) knowledge in matters relating to the mutual fund industry; (ii) experience as a director or senior officer of public companies; (iii) educational background; (iv) reputation for high ethical standards and professional integrity; (v) specific financial, technical or other expertise possessed by the individual or other experience or background of the individual, and the extent to which such expertise, experience or background would complement the Board members' existing mix of skills, core competencies and qualifications and diversity of experiences and background; (vi) perceived ability to contribute to the ongoing functions of the Board, including the ability and commitment to attend meetings regularly and work collaboratively with other members of the Board; (vii) the ability to qualify as a noninterested Trustee for purposes of the 1940 Act and any other actual or potential conflicts of interest involving the individual and each Fund; and (viii) such other factors as the Board determines to be relevant in light of the existing composition of the Board and any anticipated vacancies.

Among the attributes or skills common to all Board members are their ability to review critically, evaluate, question and discuss information provided to them, to interact effectively with the other members of the Board, management, sub-advisers, other service providers, counsel and independent registered public accounting firms, and to exercise effective and independent business judgment in the performance of their duties as members of the Board. Each Board member's ability to perform his or her duties effectively has been attained through the Board member's business, consulting, public service and/or academic positions and through experience

from service as a member of the Boards of the Eaton Vance family of funds ("Eaton Vance Fund Boards") (and/or in other capacities, including for any predecessor funds), public companies, or non-profit entities or other organizations as set forth below. Each Board member's ability to perform his or her duties effectively also has been enhanced by his or her educational background, professional training, and/or other life experiences.

In respect of each current member of the Board, the individual's substantial professional accomplishments and experience, including in fields related to the operations of registered investment companies, were a significant factor in the determination that the individual should serve as a member of the Board. The following is a summary of each Board member's particular professional experience and additional considerations that contributed to the Board's conclusion that he or she should serve as a member of the Board:

Alan C. Bowser. Mr. Bowser has served as a Board member of the Eaton Vance open-end funds since 2022 and of the Eaton Vance closed-end funds since 2023. Mr. Bowser has over 25 years of experience in the financial services industry, most of which has been dedicated to leading investment advisory teams serving institutions, family offices, and ultra-high net worth individuals in the U.S. and Latin America. From 2011-2023, Mr. Bowser served in several capacities at Bridgewater Associates, an asset management firm, including most recently serving as Chief Diversity Officer and Co-Head of the Americas Region in addition to being a Partner and a member of the Operating Committee. Prior to joining Bridgewater Associates, he was Managing Director and Head of Investment Services at UBS Wealth Management Americas from 2007 to 2010 and, before that, Managing Director and Head of Client Solutions for the Latin America Division at the Citibank Private Bank from 1999 to 2007. Mr. Bowser has been an Independent Director of Stout Risius Ross since 2021, a founding Board Member and current Board Chair of the Black Hedge Fund Professionals Network and has served on the Boards of the Robert Toigo Foundation, the New York Urban League, the University of Pennsylvania, and as Vice Chairman of the Greater Miami Chamber of Commerce Task Force on Ethics. In 2020, he was recognized as one of the top 100 "EMPower Ethnic Minority Executive Role Models" and in 2022 he was recognized by Insider Business magazine as one of 14 "Diversity Trailblazers" making corporate America more inclusive.

Mark R. Fetting. Mr. Fetting has served as a member of the Eaton Vance Fund Boards since 2016 and is the Chairperson of the Contract Review Committee. He has over 30 years of experience in the investment management industry as an executive and in various leadership roles. From 2000 through 2012, Mr. Fetting served in several capacities at Legg Mason, Inc., including most recently serving as President, Chief Executive Officer, Director and Chairman from 2008 to his retirement in 2012. He also served as a Director/Trustee and Chairman of the Legg Mason family of funds from 2008-2012 and Director/Trustee of the Royce family of funds from 2001-2012. From 2001 through 2008, Mr. Fetting also served as President of the Legg Mason family of funds. From

1991 through 2000, Mr. Fetting served as Division President and Senior Officer of Prudential Financial Group, Inc. and related companies. Early in his professional career, Mr. Fetting was a Vice President at T. Rowe Price and served in leadership roles within the firm's mutual fund division from 1981-1987.

Cynthia E. Frost. Ms. Frost has served as a member of the Eaton Vance Fund Boards since 2014. From 2000 through 2012, Ms. Frost was the Chief Investment Officer of Brown University, where she oversaw the evaluation, selection and monitoring of the third party investment managers who managed the university's endowment. From 1995 through 2000, Ms. Frost was a Portfolio Strategist for Duke Management Company, which oversaw Duke University's endowment. Ms. Frost also served in various investment and consulting roles at Cambridge Associates from 1989-1995, Bain and Company from 1987-1989 and BA Investment Management Company from 1983-1985. She serves as a member of the investment committee of The MCNC Endowment.

George J. Gorman. Mr. Gorman has served as a member of the Eaton Vance Fund Boards since 2014 and is the Independent Chairperson of the Board. From 1974 through 2009, Mr. Gorman served in various capacities at Ernst & Young LLP, including as a Senior Partner in the Asset Management Group (from 1988) specializing in managing engagement teams responsible for auditing mutual funds registered with the SEC, hedge funds and private equity funds. Mr. Gorman also has experience serving as an independent trustee of other mutual fund complexes, including the Bank of America Money Market Funds Series Trust from 2011-2014 and the Ashmore Funds from 2010-2014.

Valerie A. Mosley. Ms. Mosley has served as a member of the Eaton Vance Fund Boards since 2014 and is the Chairperson of the Governance Committee. In 2020 she founded Upward Wealth, Inc., doing business as BrightUp, a fintech platform focused on helping everyday workers grow their net worth and reinforce their self-worth. From 1992 through 2012, Ms. Mosley served in several capacities at Wellington Management Company, LLP, an investment management firm, including as a Partner, Senior Vice President, Portfolio Manager and Investment Strategist. Ms. Mosley also served as Chief Investment Officer at PG Corbin Asset Management from 1990-1992 and worked in institutional corporate bond sales at Kidder Peabody from 1986-1990. She is a Director of Envestnet, Inc., a provider of intelligent systems for wealth management and financial wellness and DraftKings, Inc., a digital sports entertainment and gaming company. In addition, she is also a board member of Caribou Financial, Inc., an auto loan refinancing company. Ms. Mosley previously served as a Director of Dynex Capital, Inc., a mortgage REIT from 2013-2020, a Director of Progress Investment Management Company, a manager of emerging managers, until 2020, and a Director of Groupon, Inc., an e-commerce platform from 2020-2022. She serves as a trustee or board member of several major non-profit organizations and endowments.