Jonathan M. Jagher is the founding partner of JJLM’s Philadelphia office. With over 20 years of experience, he has a national practice representing plaintiffs in consumer and antitrust class actions, and he and the firm have recovered over $1 billion for clients.

Mr. Jagher was appointed Co-Chair of the Settlement Committee in In re: MoveIt Customer Data Security Breach Litigation, MDL No. 1:23-md-03083-ADB (D. Mass.). He recently served as Co-Lead Counsel in Dzananovic and Howell v. Badoo Trading Limited and Bumble Trading LLC, 2021-L-307 (Cir. Ct. Winnebago County, Illinois) ($40 million settlement) and Powe v. Dermalogica, LLC, 2022-LA-000874 (Cir. Ct. DuPage County, Illinois) (settlement valued at $8.9 million). He was appointed to the Plaintiffs’ Steering Committee in In Re: TikTok, Inc., Consumer Privacy Litigation, MDL No. 2948 (N.D. Ill.), where he was one of the primary negotiators of a $92 million settlement. Mr. Jagher also served as Settlement Class Counsel in In re Proctor & Gamble Aerosol Products Marketing and Sales Practice Litigation, 2:22-MD-3025 (S.D. Ohio), and was appointed to Plaintiffs’ Executive Committees in In Re: Morgan Stanley Data Security Litigation, 1:20-CV-05914 (S.D.N.Y.) and Jones et al. v. Lemonade Inc. et al., 2022-LA-000308-366 (Cir. Ct. DuPage County, Illinois). He also served as counsel in Culbertson et al. v. Deloitte Consulting LLP, 1:20-cv-03962 (S.D.N.Y.). In addition, he supervised and directed (in part) third-party discovery in In re: Philips Recalled CPAP, Bi-Level Pap, and Mechanical Ventilator Products Litigation, MDL No. 3014 (W.D. Pa.).

Mr. Jagher’s antitrust work includes Kent et al. v. Women’s Health USA, Inc., FST-CV21-6054676-S (Ct. Superior Court), where he was appointed Co-Lead Counsel, and Cameron et al. v. Apple, Inc., 4:19-cv-03074 (N.D. Cal.), where he served on the Executive Committee and helped recover $100 million on behalf of app developers. He played active roles in In re Automotive Parts Antitrust Litigation, MDL No. 2311 (E.D. Mich.), In re OSB Antitrust Litigation (E.D. Pa.), In re Broiler Chicken Antitrust Litigation (N.D. Ill.), and In re Pork Antitrust Litigation (D. Minn.), including taking lead roles in depositions of senior executives.

Prior to private practice, Mr. Jagher served as a supervising Assistant District Attorney for the Middlesex District Attorney in Cambridge, Massachusetts, and tried approximately forty cases before a jury.

Mr. Jagher serves on the Advisory Board of Loyola University School of Law’s Institute for Consumer Antitrust Studies and has been recognized as a Pennsylvania Super Lawyer (2018–2025) after being named a Super Lawyers Rising Star (2012–2016).

Insights & Events

• Class Action Mediation Strategies, Epiq Mass and Class Conference, Ft. Lauderdale, FL, February 2025

  
  

  Attorneys’ Fees in Mega Settlements, Angeion Group Mega Settlement Summit 2024, Miami, FL April 26, 2024

  
  

• Quick Case Updates, Mass Torts Made Perfect Conference Class Action Track, Las Vegas, NV October 11, 2023

  
  

• Quick Case Updates, Mass Torts Made Perfect Conference Class Action Track, Las Vegas, NV April 11, 2023

  
  

• Quick Case Updates, Mass Torts Made Perfect Conference Class Action Track, Las Vegas, NV October 12, 2022

  
  

• Using Defendants’ Discovery Tactics to Support Class Certification, Mass Torts Made Perfect Conference Class Action Track, Las Vegas, NV April 5, 2022

  
  

• Classwide Damages Models in Misleading and False Advertising Consumer Class Actions, Strafford Webinars, May 27, 2021

  
  

• Antitrust Class Actions in the Wake of Procedural Reform, Commentator at the 21st Annual Loyola Antitrust Colloquium, Chicago, IL April 16, 2021

  
  

• Surviving the Class Rep’s Deposition, A to Z, MTMP Connect Webinar, April 23, 2020

  
  

• The Interplay of Depositions & E-Discovery: Plaintiff Offensive Review Workflows and Tips, Complex Litigation E-Discovery Forum, Minneapolis, MN September 20, 2019

  
  

• Contemporary Issues in Antitrust Law, Mass Torts Made Perfect Conference, Las Vegas, NV April 12, 2019

  
  

• New Adventures in Personal Jurisdiction, Class Action Mastery HB Litigation Conference, New York City, NY May 9, 2018

  
  

• Member of Advisory Board of Loyola University School of Law’s Institute for Consumer Antitrust Studies

  
  

Awards & Recognition

• American Antitrust Institute’s Award for Outstanding Antitrust Litigation Achievement in Private Law Practice for his and the firm's role as an Executive Committee member in Cameron et al. v. Apple Inc., 4:19-cv-03074 (N.D.Ca.) an antitrust case brought on behalf of app developers that settled for $100 million

• Pennsylvania Super Lawyer Rising Star 2012-2016

• Pennsylvania Super Lawyer 2018-2026