Jeny M. Maier
Managing Partner
{ Bio Portrait }

Jeny Maier serves as Axinn’s managing partner and has spent two decades advising Fortune 500 companies on complex antitrust aspects of high-profile, multibillion-dollar transactions. Recognized as a "Bright Rising Star" in antitrust law by The Legal 500 U.S. and a “Future Leader” in competition law by Who's Who Legal, Jeny is lauded by her peers and clients as a “seasoned antitrust lawyer who advises companies in high-profile merger cases.”

In her practice, Jeny guides clients throughout the complete life cycle of transactions, from risk analysis and due diligence, to pre-merger notifications and merger agreement negotiations, through antitrust agency review, investigations, and remedies.

Jeny leverages her background in economics to strategically assess commercial negotiations, regulatory risks and advocacy opportunities related to high-profile deals. She represents clients across industries, including the healthcare, pharmaceuticals, technology, manufacturing, telecommunications, and transportation sectors. Her experience includes advising Sunrun – a major provider of residential solar, battery storage, and energy services – on its transformational $3.2 billion acquisition of Vivint Solar.

In addition to her deal work, Jeny has considerable experience representing clients in civil and criminal antitrust investigations, and related class action litigation. She also advises clients on antitrust issues relating to pricing practices, distribution and marketing arrangements, intellectual property license agreements, and standard setting activities.

As Axinn’s managing partner, Jeny leans on her strong business acumen to develop strategy and implement initiatives on behalf of the firm. Before joining Axinn’s Executive Committee in 2022, Jeny held various leadership positions within the firm’s antitrust group and previously served as the head of the firm’s Women’s Affinity Group. Also a leader in the wider legal community, Jeny is Vice Chair of the American Bar Association Antitrust Law Section’s Serial Podcast Committee.

Before joining Axinn, Jeny was a senior associate in the antitrust practice of a global law firm. While attending the George Washington School of Law, she worked as a legal intern for the Federal Trade Commission’s Bureau of Competition and the U.S. Department of Justice Antitrust Division’s National Criminal Enforcement Section.

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Professional Activities

  • American Bar Association, Antitrust Law Section, Serial Podcast Committee, Vice Chair (2022 – 2023)
  • American Bar Association, Antitrust Law Section, Corporate Counseling Committee, Vice Chair (2019 – 2022)
  • American Bar Association, Antitrust Law Section, Antitrust Law Developments, Editorial Board (2018 – 2019)
  • American Bar Association, Antitrust Law Section, Civil Practice and Procedure Committee, Young Lawyers' Advisory Panel (2013 – 2017)
  • American Bar Association, Health Law Section
  • American Health Lawyers Association


Mergers and Acquisitions

  • Representing McKesson in numerous matters, including a joint venture combining its U.S. Oncology Research and HCA Healthcare Inc.’s Sarah Cannon Research Institute, its $875 million acquisition of Rx Savings Solutions, its $1.4 billion acquisition of CoverMyMeds, its $800 million acquisition of Medical Specialties Distributors (MSD), its $735 million acquisition of RxCrossRoads from CVS, its acquisitions of Labsco and Biologics, and its sale of Enterprise Information Solutions to Allscripts. Also secured clearance for McKesson’s $3.4 billion healthcare technology joint venture with Change Healthcare, which was unconditionally cleared after a Second Request investigation.
  • Represented Take-Two Interactive Software Inc. in its $12.7 billion acquisition of Zynga.

  • Represented Dell Technologies Inc. in its $4 billion sale of Boomi.

  • Represented Tufts Health Plan in its merger with Harvard Pilgrim Health Care.

  • Represented Sunrun in its $3.2 billion acquisition of Vivint Solar, securing clearance without a second request investigation.

  • Lead global coordinating antitrust counsel to Dell Inc. in its $67 billion acquisition of EMC Corporation.

  • Global antitrust lead counsel to Johnson Controls in the $2 billion sale of its Scott Safety business to 3M.

  • Represented Stanley Black & Decker Inc. in its $900 million purchase of the Craftsman brand from Sears Holdings Corporation.

  • Obtained clearance for Charles River Laboratories’ $585 million acquisition of WIL Research Laboratories.

  • Represented Tyler Technologies Inc. in its $670 million acquisition of New World Systems Corporation.

  • Represented Interactive Data Corporation in its $5.2 billion acquisition by Intercontinental Exchange Inc.
  • Represented SunGard in its $9.1 billion acquisition by Fidelity National Information Services Inc.
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Litigation Experience

  • Representing Independence Health Group (Independence Blue Cross) in a class action, multidistrict litigation (MDL) against the Blue Cross Blue Shield Association and individual Blue Cross and Blue Shield plans. The lawsuit, which alleges that the plans' designated service areas are anticompetitive, is the most significant challenge to the Blue System in its 80-year history.
  • Represented RelayHealth, a subsidiary of McKesson, in a treble-damages class action alleging conspiracy to monopolize electronic prescribing services.
  • Represented the Alliance for Safe Online Pharmacies in a treble-damages antitrust action alleging conspiracy to prevent from accessing internet platforms.


  • Lawdragon, 500 Leading Dealmakers in America (2024)
  • The Legal 500 United States, "Bright Rising Star" in Antitrust Law (2014)
  • Who’s Who Legal Competition: Future Leaders (2017 – 2022)
  • Profiles in Diversity Journal, Women Worth Watching (2018)


Thought Leadership



  • JD – The George Washington University Law School (2005)
  • BS – Georgetown University (2000)


  • District of Columbia
  • New York
  • U.S. District Court District of Columbia
  • U.S. District Court Eastern District of New York
  • U.S. District Court Southern District of New York

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