Current Role
  • Partner, Hagens Berman Sobol Shapiro LLP
  • Member of the Hagens Berman team representing a proposed class of insulin consumers in their claims against Eli Lilly, Novo Nordisk and Sanofi for unfairly and unconscionably increasing the cost of live-saving insulin medications. The firm has been named lead counsel in this case, and the plaintiffs have moved for class certification.
  • Member of the Hagens Berman team litigating claims against Takeda and Par on behalf of a proposed class of direct purchasers of Amitiza and its generic equivalents regarding a patent infringement settlement, through which Takeda is alleged to have paid Par to delay the launch of its generic Amitiza product, resulting in hundreds of millions in overcharges to the proposed class.
  • Member of the firm’s team representing a certified class of millions of Puerto Rican residents against Puerto Rico Electric Power Authority (PREPA), employees of PREPA’s Fuel Oil Office, the world’s largest fuel oil suppliers – including Brazilian state-owned Petrobras and Shell Trading (US) Company – and Puerto Rico-based fuel oil laboratories for perpetuating an extensive fuel oil fraud, resulting in users of electricity in Puerto Rico being overcharged by more than $1 billion dollars. In 2018, the court certified the class action, arguably the largest in Puerto Rico’s history.
  • Member of the Hagens Berman team representing the residents of Sycamore, Illinois in a lawsuit against their city for negligently maintaining the town’s water infrastructure, which created a public nuisance.
  • Prior to joining Hagens Berman, Mark clerked for Judge John Z. Lee in the Northern District of Illinois, and Justice Jesse G. Reyes of the Illinois Appellate Court.
  • During law school, Mark served as an editor for the DePaul Law Review, graduated from the top of his class, and earned the CALI Excellence for the Future Award in all five of his legal writing and trial advocacy courses.
  • People v. Kladis and the Illinois Courts’ Treatment of Evidence Spoliation by Law Enforcement, Illinois State Bar Association Criminal Justice Newsletter, Vol. 56, No. 1, August 2012
Personal Insight

An avid musician, Mark has been playing bass and guitar for various rock, blues, jazz and country acts throughout his life. As a teen, he frequented the chambers of the late Judge Blanche M. Manning to participate in her famed jazz jam sessions. Decades later, he continues to blend his legal and musical pursuits in support of bar association events in Chicago.