Mark Delaney
Contact Info
Education
  • Boston University School of law, J.D., magna cum laude
  • Tulane University, BA in Political Science, summa cum laude

Mark Delaney is an attorney at Block & Leviton LLP, focusing his practice on case securities class action litigation. He serves as Co-Chair of the Firm’s New Case Investigation and Monitoring Team. Among the notable cases Mark has worked on are State Street Bank & Trust Co. ERISA Litigation, 07-Civ-8488, 08-MD-1945 (S.D.N.Y.), where he was part of a litigation team which successfully recovered $89.75 million for pension funds who were improperly exposed to risky subprime investments. He was also lead associate representing several Ohio State Pension funds in the securities class action In re BP Securities Litigation (S.D. Tex.), where he recovered $175 million in investor losses related to the catastrophic explosion on the Deepwater Horizon oil rig and the resultant, massive oil spill in the Gulf of Mexico. Mark was also part of the In re Onyx Pharmaceuticals, Inc. Securities Litigation (Cal. Sup. Ct.) team. That case, which alleged breaches of fiduciary duty by the Onyx Board, settled for $30 million, making it the largest post-close M&A settlement in California state court history at the time. He also represented two SEC whistleblowers who received over $1 million for their submission pursuant to the Dodd-Frank Act’s “bounty” provision relating to the submission of material information exposing securities fraud.

In addition to class action litigation, Mark has represented clients in a broad range of matters, including complex commercial litigation and intellectual property litigation, and is experienced in defending SEC enforcement actions. He is also experienced in alternative dispute resolutions and has represented clients in arbitration proceedings involving both the earn-out rights and the indemnification rights of corporate officials.

Mark received his B.A. from Tulane University in New Orleans, Louisiana, where he graduated summa cum laude. He graduated magna cum laude from Boston University School of Law and was a G. Joseph Tauro Distinguished Scholar. Mr. Delaney is admitted to the Bar of Massachusetts and the U.S. District Court for the District of Massachusetts.

Mark previously worked at Block & Leviton from 2011-2015 and rejoined the firm in September of 2019. Before that, Mark practiced for 5 years at one of Boston’s largest law firms, where he specialized in securities litigation and defense of government enforcement actions.

Admissions »
  • Massachusetts
  • District of Massachusetts
  • Southern District of Texas
Notable Cases »
  • Lead associate in In re BP plc Securities Litigation 4:10-MDL-02185 (S.D. Tex.) relating to the catastrophic explosion on the Deepwater Horizon oil rig. Part of a team that recovered $180 million in investor losses.
  • In re Onyx Pharmaceuticals, Inc. Securities Litigation (Cal. Sup. Ct.) involved allegations that the Onyx Board breach their fiduciary duties to the Company. Case settled for $30 million, making it the largest post-close M&A settlement in California state court history
  • Developed class action against Raymond James against for its role in aiding and abetting a Ponzi scheme involving developments associated with Jay Peak Resort in Vermont. Litigation ultimately recovered $150 million for defrauded investors.
Memberships »
  • Massachusetts Trial Academy
  • Boston Bar Association
Block & Leviton LLP
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