Tiffany Rider

Partner

Contact

Practice Areas

Antitrust

Tiffany Rider is an antitrust partner at Axinn with over 20 years of experience widely recognized for her skill in helping clients navigate criminal antitrust cartel investigations, follow-on antitrust class action litigation, and complex mergers and acquisitions.

Tiffany Rider

Partner

Washington, DC

Contact

Practice Areas

Antitrust

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Ranked by Chambers USA as an "Antitrust: Litigation Specialist" and by The Legal 500, her extensive experience includes representing clients in significant domestic and international cartel cases, advocating before agencies like the Department of Justice and European Commission. She also has a strong track record in civil follow-on MDLs, civil litigation and arbitration.

In her counseling and compliance practice, Tiffany designs and implements global competition compliance programs tailored to meet the diverse needs of clients in a wide array of industries, including technology, manufacturing, transportation, food and beverage, health care and financial services. Additionally, Tiffany has extensive experience representing clients on significant mergers and acquisitions, including before both the Department of Justice and Federal Trade Commission.

Named one of DC’s Top 10 Antitrust Litigation Specialists to Watch in 2023 by Business Today, Tiffany is a frequent speaker on panels discussing criminal antitrust and civil litigation issues. She has held several key ABA leadership roles, including on the International Cartel Task Force, Civil Practice and Procedure Committee, and the Diversity Plan Task Force. She served by invitation from the U.S. DOJ as a non-governmental advisor (NGA) for the International Competition Network (ICN) at the 2021 Annual Conference.

Prior to joining Axinn, Tiffany practiced in the antitrust department of a large, global law firm.

Experience

Currently, lead counsel defending Tyson Foods in multiple major treble-damage class action litigations and regulatory investigations alleging industry-wide conspiracies to raise the prices of pork and turkey.
Currently representing an executive in an international price-fixing cartel investigation.
Currently defending a multi-family real estate investment company in a DOJ criminal investigation and civil litigation involving allegations of information exchange and price-fixing via algorithms.
Represented a company and obtained leniency in a DOJ no-poach investigation.
Represented several individuals successfully in a DOJ no-poach investigation.
Represented Corning Incorporated in the auto part criminal investigation and follow-on civil MDL.
Successfully closed a no-poach investigation in the fintech sector.
Successfully navigated a company dealing with parallel investigations involving the DOJ and State AG.
Successfully closed a bid-rigging investigation of a defense contracting firm.
Successfully closed a price-fixing investigation of an international shipping company.
Represented Horizon Lines in the cabotage shipping criminal investigation and follow-on civil MDL, as well as its transactions valued at $610 million with Pasha and Matson.
Represented EQT Corporation in its $720 million sales of its natural gas distribution business to Peoples Natural Gas.
Represented Sprint in its opposition to AT&T’s proposed acquisition of T-Mobile. This case was recognized in the 2012 Financial Times “U.S. Innovative Lawyers” report.
Represented BHP Billiton in its proposed $150 billion acquisition of Rio Tinto (received Department of Justice clearance).

* Includes matters handled prior to joining Axinn

Thought Leadership

Losing Per Se: Potential Fallout From the U.S. Department of Justice’s No-Poach Enforcement, Concurrences Review, 2023

Individuals as Whistleblowers, Cartels and Leniency, International Comparative Legal Guide, 2017

United States: Private Antitrust Litigation, Global Competition Review, 2017

International Cartel Investigations, Responding to a DOJ Investigation Chapter, ABA Handbook (Forthcoming)

United States: Private Antitrust Litigation, Global Competition Review, 2016

Horizontal Agreements and Cartels in EU Competition Law, Detection of Cartels Chapter, Oxford University Press, 2015

United States: Private Antitrust Litigation, Global Competition Review, 2015

United States: Private Antitrust Litigation, Global Competition Review, 2014

Antitrust Litigation and Enforcement - Gone Global, Competition Law 360, 2012

Sharis A. Pozen: An Insider's Candid Views of Competition Issues Past and Future, Concurrences Journal, November 2012

Disclosure Questions Ripples Both Sides of the Pond, Comp Law 360, January 10, 2012

Honors

Chambers USA – District of Columbia: Antitrust: Litigation Specialists (2018 – 2025)
Chambers USA, Nationwide: Antitrust Cartel (2025)
Winner, The Burton Foundation’s Law360 Distinguished Legal Writing Award (2025)
Named to Business Today's "Top 10 DC Antitrust Litigation Specialists to Watch in 2023"
Lawdragon, "Leading Antitrust & Global Competition Lawyers" (2025)
Lawdragon, "500 Leading Litigators in America" (2023 – 2025)
Fellow, Litigation Counsel of America
Named to "Women Worth Watching 2019" by Profiles in Diversity Journal
The Legal 500 United States (2022 – 2025)

Education

JD, magna cum laude – Indiana University School of Law (2002)
BA, Theatre Arts – University of California, Los Angeles (1992)

Admissions

District of Columbia
Indiana
U.S. District Court Northern District of Indiana
U.S. District Court Southern District of Indiana
U.S. District Court District of Columbia
U.S. District Court Eastern District of Michigan

Quotes

Tiffany Rider is a trusted partner and master strategist in cartel defense. Her judgment is impeccable and she is a joy to work with.

Legal 500 United States

She has a great sense of the bigger picture.

Chambers USA

Tiffany is a fantastic litigator." "A strategic thinker.

Chambers USA

She is excellent in both cartel and litigation matters." "She is very experienced in antitrust law and excels in coming up with practical advice." "She has a great rapport with clients and is a pleasure to work with.

Chambers USA

…A rock solid attorney, she's disarmingly friendly but an absolute beast when it comes to her command of the law…she's wicked smart.

Chambers USA

Tiffany does an excellent job. She is incredibly effective at marshaling arguments.

Chambers USA

Profile

Prior to joining Axinn, Tiffany practiced in the antitrust department of a large, global law firm.

Tiffany Rider is a trusted partner and master strategist in cartel defense. Her judgment is impeccable and she is a joy to work with.

Legal 500 United States

Tiffany Rider is a trusted partner and master strategist in cartel defense. Her judgment is impeccable and she is a joy to work with.

Legal 500 United States

News & Insights

View all Insights

July 11, 2025

New Incentives, New Rewards: What You Need to Know About the Antitrust Division’s First-Ever Whistleblower Rewards Program

Cartel conduct tends to occur in secret. As a result, the Antitrust Division has long focused on augmenting its abilities to identify...

Axinn Viewpoints

Antitrust

June 11, 2025

Axinn Recognized by Legal 500 2025 U.S. Guide for Excellence in Antitrust and Litigation

Axinn has once again been named a leading law firm in the Legal 500 2025 U.S. guide, earning top rankings in Antitrust: Cartel, Civil Litigation/Class Actions: Defense, and Merger Control.

Awards & Recognitions

Antitrust

June 5, 2025

Axinn Earns Band 1 Recognition in Multiple Categories in 2025 Chambers USA Guide

Axinn is proud to announce that more than half of our partners have been ranked in the 2025 Chambers USA Guide – with recognition in three major markets including New York, California and District of Columbia. Several practitioners were recognized in multiple sub practice areas including Antitrust: Litigation Specialists and Antitrust: Cartel.

Awards & Recognitions

Antitrust

February 27, 2025

Conspiracy Theories Newsletter, 2025 Edition: Predictions for Cartel Enforcement Under Trump 2.0

Partners Tiffany Rider, Jimmy Attridge, Dan Oakes, and associate Audrey van Duyn co-authored the second edition of Axinn’s Conspiracy Theories Newsletter. The 2025 edition offers a summary of Axinn’s predictions for cartel enforcement under President Trump.

Byline Articles

Antitrust

February 20, 2025

Daniel Oakes, Tiffany Rider, and Lindsey Strang Aberg Win “Law360 Distinguished Legal Writing Award”

An article by partners Daniel Oakes and Tiffany Rider and counsel Lindsey Strang Aberg was selected for The Burton Foundation's "Law360 Distinguished Legal Writing Awards." This award recognizes outstanding legal writing, with only 20 articles selected annually by the nation's top law firms.

Awards & Recognitions

Antitrust

News & Insights

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