David C. Mahaffey
Recognized since 2009
Washington, District of Columbia
Practice Areas
Mutual Funds Law
Securities Regulation
David is the managing partner of the Washington, D.C. office, as well as the co-leader of the Investment Management Group. Prior to joining Sullivan & Worcester, David was Special Counsel in the Washington, D.C. office of Gibson, Dunn & Crutcher. He previously served as Assistant General Counsel for Legislation and Investment Company and Adviser Regulation at the Securities and Exchange Commission and as Counsel to SEC Commissioner Aulana Peters.
Contact & Links
- E-mail: dmahaffey@sullivanlaw.com
- Direct Phone Number: 202-775-1200
- Phone Number: 202-775-1200
- Lawyer Page: https://www.sullivanlaw.com/david-c-mahaffey
Location
- 1666 K Street, NW
Washington, DC 20006
Education
- Harvard University, J.D., graduated 1982
- Princeton University, B.A., graduated 1979
Bar Admissions
- District of Columbia, The District of Columbia Bar
Affiliations
- Princeton University - Medieval Studies Advisory Council
Court Admissions
- U.S. District Court, District of Columbia
- U.S. Court of Appeals for the District of Columbia Circuit
Sullivan & Worcester LLP
Headquarters:
Boston, Massachusetts
33 The Best Lawyers in America® awards
9 Best Lawyers: Ones to Watch® in America awards
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Recognized in The Best Lawyers in America® 2025 for work in:
- Mutual Funds Law
- Securities Regulation
Awards:
Chambers Global, Ranked in Investment Funds (2021-2023)
- Chambers USA, Ranked in Investment Funds (Nationwide) (2015-2022)
- The Legal 500 U.S. (2012-2022)
Best Lawyers in America® (2009-2023)
- Washington, D.C. Super Lawyers, Securities/Corporate Finance (2014-2017)
Martindale-Hubbell featured AV® Peer Review Rated
Additional Areas of Practice:
- Securities / Capital Markets Law
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