Anna Kertesz
Image of Anna Kertesz

Anna Kertesz

Partner

Email

anna.kertesz@aoshearman.com

Offices

Washington DC

V-CARD
Anna advises on merger clearance, antitrust and consumer protection counseling, and civil and criminal litigation.

She regularly defends clients in proposed and consummated mergers before the DOJ Antitrust Division and FTC across healthcare, food products, petroleum, and technology, and has defended government price-fixing and bid-rigging allegations in transportation and construction materials. She also counsels technology companies in multi-jurisdictional civil conduct investigations. 

Anna previously served as an attorney at the U.S. Federal Trade Commission, where she led in-depth oil and gas and pharmaceutical merger investigations from initial review through consent agreement and handled market manipulation enforcement. Her government-to-private-practice background has earned recognition as “Best in Antitrust/Competition” for the Americas (Euromoney Women in Business Law, 2022), “Next Generation Partner” nationally for six consecutive years (Legal 500 U.S., 2021–2026), “Leading Litigator” (Lawdragon, 2022–2026), and “Future Leader” in Competition (Who’s Who Legal, 2021–2026).

Expertise

Industries

Experience

Representative matters

  • Technology companies on multi-jurisdictional civil conduct investigations spanning the U.S., India, Mexico, and other jurisdictions.
  • GlobalWafers on the ~USD5 billion acquisition of Siltronic, obtaining antitrust clearance.
  • Meta on the USD5.7bn investment into Jio Platforms (Indian e-commerce) and related strategic partnership.
  • Metso on its combination with Outotec, securing expedited U.S. antitrust clearance despite a prior forced separation of the same businesses.
  • Vertex Pharmaceuticals on the acquisition of cystic fibrosis drug CTP-656 from Concert Pharmaceuticals for up to USD250 million.
  • Anthem on the USD54bn acquisition of Cigna.
  • XO Communications on the USD1.8bn sale to Verizon.
  • Liberty Dialysis on the acquisition of Renal Advantage, creating the third-largest U.S. dialysis provider at the time, and subsequent USD1.7bn acquisition by Fresenius.
  • Grupo Bimbo on the USD949m acquisition of Sara Lee’s North American bakery business.
  • Pilot Travel Centers on the USD1.8bn acquisition of Flying J’s travel plaza business before the FTC.
  • WebCT on its merger with Blackboard before the DOJ Antitrust Division.

Includes experience from a previous firm. 

Published Work

  • A. Kertesz, Co-author, “Getting the Deal Through—Merger Control,” 2020, 2021, 2022
  • A. Kertesz, Co-author, ‘“Merger Control Comparative Guide,” Legal 500 (6th Ed.)
  • A. Kertesz, Co-author, “The U.S. FTC Votes 3-2…,” Concurrences, October 25, 2021
  • A. Kertesz, Co-author, “Merger Control in the United States,” Legal 500 Comparative Guide (5th Ed.)
  • A. Kertesz, Co-author, “Turf Wars…,” ABA Antitrust Counselor, Issue 14.2, February 2020
  • A. Kertesz, Co-author, “Merger Control Comparative Guide,” Legal 500 (4th Ed.)
  • A. Kertesz, Co-author, “Merger Control Comparative Guide,” Legal 500 (3rd Ed.)
  • A. Kertesz, Co-author, “Merger Control Comparative Guide,” Legal 500 (2nd Ed.)

Speaking Engagements

  • Panelist, “The Future of Regulation and Quasi-Regulation,” University of Southern California Global Competition Law Thought Leadership Conference, 2025
  • Moderator, “Antitrust Issues in Healthcare,” GCR Live: Women in Antitrust 2025
  • Corporate Counseling Committee Antitrust Update, ABA Section of Antitrust Law, May 2022
  • “The Future of Global Merger Control”—Spotlight on Tech and Pharma in the U.S., UK, EU, and Middle East, The Legal 500, September 2021
  • Corporate Counseling Committee Antitrust Update, ABA Section of Antitrust Law, December 2019
  • “Antitrust and Innovation: U.S. Scrutiny of Tech Ripples Across Industry,” Lexology webinar, December 2019
  • “Local Markets Issues in Merger Review,” ABA Section of Antitrust Law, November 2018
  • Interviewee, “Recent Merger Trends in the Trump Administration,” The Capitol Forum, April 2018

Recognition

“A pivotal adviser with deep knowledge of merger investigations in oil & gas as well as pharmaceutical sectors.”
Legal 500 United States, 2021–2026

Awards

  • Best in Antitrust/Competition, Americas, Euromoney Women in Business Law Awards, 2022
  • Next Generation Partner (national), Legal 500 U.S., 2021–2026
  • Leading Litigator, Lawdragon, 2022–2026
  • Future Leader—Competition, Who’s Who Legal, 2021–2026

Qualifications

Admissions

District of Columbia

Maryland

Courts

U.S. District Court for the District of Columbia

Academic

JD, Georgetown University Law Center 

BA, Georgetown University, cum laude

Languages

English, Hungarian
Disclaimer
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.