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Stephen M. Medlock
Stephen M. Medlock
Partner — Antitrust
Partner — Antitrust

Stephen M. Medlock

Stephen M. Medlock
Washington, D.C.

2200 Pennsylvania Avenue NW
Suite 500 West
Washington, D.C. 20037

start quote symbolI take pride in efficiently resolving my clients' highest stakes and most complex antitrust matters. I learn my clients' business inside and out so that I can find the solutions that others don't see.end quote symbol
Stephen M. Medlock

Experience Highlights

  • Representing Delta Dental member companies in connection with a series of consolidated class actions alleging that Delta Dental companies underpaid dentists

  • Representing national property management companies in connection with a series of consolidated class actions alleging the existence of a conspiracy to increase or stabilize the price of apartments using a common algorithm

  • Representing multiple prominent healthcare providers in antitrust claims against MultiPlan, Inc. and alleged co-conspirators for underpaying out-of-network reimbursements

  • Representing national real estate brokerage and regional real estate trade group in antitrust class actions alleging a conspiracy to force home-sellers and home-buyers to pay inflated sales commissions to real estate brokerages

  • Representing shale oil producer in multiple antitrust class actions alleging a conspiracy to decrease shale oil production

  • Representing United States Steel Corporation in litigation alleging that major domestic steel companies conspired to boycott sales of steel slab to a competitor

  • Representing energy client in internal investigation into antitrust criminal matters and related compliance issues

  • Representing companies in multiple state attorney general and grand jury investigations into alleged antitrust violations

  • Obtained closure of antitrust grand jury investigation into one of world’s largest energy companies without any indictments

  • Obtained summary judgment and complete victory for client in In re Broiler Chicken Antitrust Litigation, 2023 WL 7220170 (N.D. Ill.)

  • Obtained summary judgment and complete appellate victory in In re Chocolate Confectionary Antitrust Litigation, 801 F.3d 383 (3d Cir. 2015) and Sterling Merchandising, Inc. v. Nestle S.A., 656 F.3d 112 (1st Cir. 2011)

  • Obtained dismissal of claims against multinational energy corporation direct-action cases, and state attorney general cases alleging that it engaged with other defendants in a decade-long conspiracy to bribe Venezuelan officials and rig bids for the sale and purchase of crude oil submitted to PDVSA, allegedly costing PDVSA billions of dollars in lost revenue; the trust was purportedly assigned the claims of PDVSA and the Venezuelan government so that it could litigate on PDVSA’s behalf in the U.S. courts

  • Represented multiple corporate client in non-public antitrust grand jury investigations and responses to civil investigative demands served by the U.S. Department of Justice and state attorneys general

  • Caused plaintiffs to abandon their claims following discovery on monopolization, attempted monopolization, and tying claims in Nestle Nespresso USA, Inc. v. Ethical Coffee Company, S.A.

  • Obtained dismissal of antitrust claims at motion to dismiss stage in Nirvana, Inc. v. Nestle Wates North America Inc.

  • Obtained rare denial of summary judgment for plaintiff in a “duty to deal” antitrust case alleging monopolization and attempted monopolization

  • Represented an elite college in class action alleging that highly-selective universities conspired to limit need-based financial aid paid to admitted undergraduate students

  • Represented multiple executives alleged to have conspired abroad to fix the prices of automotive parts destined for the US market


  • American University Washington College of Law, JD, cum laude, Mooer’s Trophy for Outstanding Student in Trial Advocacy; Journal of Sustainable Development Law and Policy (2007-2008), 2009
  • Georgetown University, BSFS, International Politics, 2006
  • Legal 500 U.S., Antitrust: Civil Litigation/Class Actions: Defense, 2023 and 2024
  • Co-Chair, Exemptions & Immunities Committee, America Bar Association Section of Antitrust Law
  • District of Columbia
  • Virginia
  • U.S. Supreme Court
  • U.S. Court of Appeals for the Eleventh Circuit
  • U.S. Court of Appeals for the Third Circuit
  • U.S. Court of Appeals for the Eighth Circuit
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. Court of Appeals for the Fifth Circuit
  • U.S. District Court for the District of Columbia
  • English
  • Russian
  • Greenwashing and the Energy Transition: Principles for Mitigating Risk,” CorpGov, June 6, 2023
  • “Chicken Cos. Say Class Treatment Improper In Price-Fix Fight,” Law360, May 10, 2022
  • “Judge says ‘metering’ of asylum applicants at border is illegal,” Reuters, September 3, 2021
  • “‘Turnback’ Asylum Policy Defies 5th Amendment, Judge Says,” Law360, September 2, 2021
  • “Judge Doubts DHS Asylum Stats Disprove ‘Turnback’ Policy,” Law360, August 31, 2021
  • “Judge weighs international implications to Trump-era metering of asylum seekers,” Courthouse News Service, August 31, 2021
  • “DHS Sanctioned Over Border Officers’ Note-Shredding,” Law360, March 30, 2021
  • “A Border Officer Said They Were Told To Lie About Not Having Enough Space To Process Asylum-Seekers,” BuzzFeed News, February 14, 2020
  • “TC Heartland Opens The Door To New Antitrust Claims In Del.,” Law360, June 2, 2017
  • “Auto Dealer Robinson-Patman Act Cases After Stevens Creek,” Law360, December 14, 2016
  • “8 Thoughts On Cartel Investigations Post-Yates Memo,” Law360, March 15, 2016
  • “7th Circ. LCD Antitrust Case: Foreign Vs. US Interests,” Law360, October 30, 2014