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Practice Area(s)


  • LL.M., Georgetown University Law Center, 2012
  • J.D., University of Maryland School of Law, 1998, with honor; Order of the Coif; Editor-in-Chief, The Business Lawyer
  • Cornell University, 1992, Philip Merrill Fellow, 1991-1992; Claude R. Lambe Fellow, 1990-1991
  • B.A., University of Pennsylvania, 1987

Bar and Court Admissions

  • District of Columbia
  • Maryland
  • Virginia
  • District of Columbia Court of Appeals

Other Professional Affiliations

Chair, American Bar Association, Section of Business Law, Nonprofit Organizations Committee

Member, John Carroll Society

Member, Maryland State Bar Association

Member, Phi Delta Phi

Government Experience

Law Clerk, Honorable Raymond G. Thieme, Jr., Maryland Court of Special Appeals, 1998-1999

William M. Klimon

Member, Washington, D.C.
(202) 862-5022 | v-card | PDF

William M. Klimon is a Member in Caplin & Drysdale's Washington, D.C., office. Mr. Klimon joined the firm in 2001 after he had previously practiced in the corporate law departments of two other national law firms.  Since 2012, The Legal 500 has listed Mr. Klimon as a leader in his field for Not-for-Profit and Domestic Tax: East Coast.


Mr. Klimon's practice focuses on corporate governance and transactions, particularly for nonprofit organizations. Over the last decade, he has advised over 500 nonprofit organizations on a complete range of issues from formation to dissolution, including over a dozen nonprofit mergers. He has worked with many of the nation's largest private foundations, public charities, political campaigns, environmental organizations, healthcare institutions, universities, libraries, museums, and churches.

Mr. Klimon also practices in the areas of mergers & acquisitions, joint ventures, intercompany lending, and choice of business entities and alternative organizational structures. He has advised a variety of small- and medium-sized partnerships, LLCs, and close corporations, as well as large enterprises including multinational banks, manufacturers, and publishers.

Professional Activities

Mr. Klimon is chairman of the Nonprofit Organizations Committee of the ABA's Section of Business Law, for which he previously served as co-chair of the Joint Subcommittee on Nonprofit Corporate Governance. He also serves on the Library Committee of the National Sporting Library & Museum, Middleburg, Virginia, and was the co-founder of the University of Maryland Chapter of the St. Thomas More Society. In 2017, he was elected to membership in the American Antiquarian Society.

Mr. Klimon served in the U.S. Army from 1987 to 1990, during which time he was assigned to the U.S. Army Field Station in Berlin. Later, he was a Lambe Fellow and a Merrill Fellow in the history department of the graduate school at Cornell University and worked on the staff of The Johns Hopkins University.

Awards & Rankings

  • The Legal 500, Leading Lawyer 2012; Recommended, 2013-2017
  • Best Lawyers in America, 2020-Present

Recent News

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Speaking Engagements

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Recent Publications

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