Class Actions
United States
19 August 2025
Praised for its ability to provide 'practical advice', the boutique firm Axinn Veltrop & Harkrider is recognized for its expertise in managing complex cartel cases before antitrust agencies globally. The firm stands out for its strength in price-fixing investigations and its specialized knowledge at the intersection of antitrust and intellectual property law. Steering the practice is Michael Keeley, who is noted for his experience in defending litigated merger challenges. He is supported by the 'very smart, experienced and collaborative' Tiffany Rider, who represents both corporations and individuals in matters before the DOJ, the European Commission, and the Canadian Competition Bureau. James Attridge, described as 'very thorough, measured, smart, and creative', brings a wealth of experience in leniency applications, investigations into labor-market collusion, and internal probes. All mentioned lawyers are based in Washington DC.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Jimmy Attridge is very thorough, measured, smart, and creative. Great advocate for clients.'
'Tiffany Rider is very smart, experienced and collaborative. A great advocate for clients.'
'Dan Oakes is a terrific attorney, very thoughtful and creative.’
‘This team has an excellent combination of relevant defense and recent government experience.'
‘I have worked with several partners, including Tiffany Rider, Dan Oakes and Jimmy Attridge. Each of them is an outstanding lawyer.'
‘Clients would appreciate knowing that the Axinn team provides practical advice that identifies likely risk while also recognizing the potential implications to the business as a whole.’
Key clients
- Cantex Inc.
- Diamond Plastics Corp.
- Prime Conduit, Inc.
- Sanderson Pipe Corporation
- Southern Pipe, Inc.
Work highlights
Serving as counsel for five prominent PVC pipe manufacturers in a significant consolidated antitrust class action filed in the US District Court for the Northern District of Illinois.
Practice head
Michael Keeley
Other key lawyers
Daniel Oakes; James Attridge; Tiffany Rider; John Harkrider