Allison Sheedy

Allison F. Sheedy

Washington, D.C. Office
T: 202.204.3513
F: 202.204.3501
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Allison F. Sheedy is an attorney in the Washington, DC office of Constantine Cannon. Ms. Sheedy’s practice focuses on civil antitrust litigation, government antitrust investigations involving potentially anticompetitive business practices, and consumer protection matters. Ms. Sheedy also provides advice on an array of antitrust issues, including general compliance, joint ventures, multijurisdictional investigations, the merger review process and merger investigations.

Ms. Sheedy has wide ranging experience with complex case litigation, and has represented clients, both as plaintiffs and defendants, in a variety of federal and state lawsuits involving commercial controversies.

Ms. Sheedy has represented clients in a diverse range of sectors including book publishing, health care, telemarketing, consumer electronics, shipping and logistics, and the credit card industry.

Representative Matters:

  • Representation of major book publisher in connection with price fixing investigation and litigation by DOJ, state attorney generals, and private plaintiffs related to electronic books
  • Representation of orthopedic society, practice groups and physicians in connection with group boycott investigation by DOJ
  • Antitrust counseling and representation of national health insurance company in variety of transactions and litigations, including representation as third party in significant DOJ litigation related to most favored nations clauses
  • Representation of film production company and telefunder for nonprofit groups in consumer protection litigation by FTC and DOJ involving First Amendment issues
  • Representation of medical device manufacturer in defense of claims brought under Section 2 of the Sherman Act by competitor

Prior to joining Constantine Cannon in June 2013, Ms. Sheedy was counsel at the law firm of Akin Gump Strauss Hauer & Feld, LLP.

Ms. Sheedy received her B.A. in literature from Sarah Lawrence College in 1998 and her J.D. in 2006 from the University of Pennsylvania Law School, where she was Articles Editor of the University of Pennsylvania Law Review. Ms. Sheedy also holds an M.A. in Liberal Studies from the New School for Social Research.

Ms. Sheedy is a member of the District of Columbia and Pennsylvania bars. She is a member of the Antitrust Section of the ABA and is a member of the Antitrust and Litigation Sections of the ABA.

Practice Groups


  • Washington DC, Pennsylvania


These Standards are A-Changin’: The Rail Fuel Surcharge as a Class Certification Case Study By Constantine Cannon attorney Allison Sheedy, published in The Price Point’s Winer 2017 issue.

Is Web 'Transparency' Good for Competition? Bloomberg BNA, Electronic Commerce & Law Report (Dec. 25, 2013)
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Justice Department Launches Section 1 Attack on "Most Favored Nations" Clauses in Hospital Contracts The Antitrust Counselor (Jan. 2011)
Negotiating the Privilege Minefield: Some Differences Between Attorney-Client Privilege in the U.S. and Europe Corporate Counsel Section Of The State Bar Of Texas Newsletter, (Feb. 2011)
Recent U.S. & U.K. Developments Affecting Competition Law Compliance Programs The Metropolitan Corporate Counsel, (July 2010)


March 3, 2014
Constantine Cannon attorney Allison Sheedy presented the plaintiffs' perspective during an ABA Section of Antitrust Law panel discussion entitled
Clone Wars: Abraham & Veneklasen Joint Venture v. American Quarter Horse Association related to the recent federal jury decision in an antitrust case involving a standard setting organization.

August 29, 2013 Attorney Allison Sheedy presented the Stafford CLE program entitled "Mitigating Antitrust Risk in Most Favored Nation, Non-Discrimination, and Anti-Steering Contract Provisions.
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The London office of Constantine Cannon is a separate and independent limited liability partnership registered in England and Wales (with registered number OC376384) with a registered office at 1 Paternoster Square, London EC4M 7DX. Constantine Cannon LLP in London is authorised and regulated by the Solicitors Regulation Authority. The word "partner" denotes a member of Constantine Cannon LLP, or an employee or consultant with equivalent standing and qualifications. The professional rules applicable to the firm are available at the SRA website at