Marissa Parker

Marissa Parker


Marissa Parker represents corporate, mutual fund, institutional and non-profit clients as both plaintiffs and defendants in an array of complex business litigation and arbitration matters, with a focus in securities, health care and ERISA.  Her deep and diverse experience trying cases and counseling clients in highly-regulated industries informs her practical, business-oriented approach to problem solving, including regularly advising clients on early case assessment and the strategic resolution of commercial disputes short of trial.

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Representative Matters

  • obtained favorable settlement for more than 100 mutual funds and institutional investors as plaintiffs in securities fraud opt-out actions against Petrobras arising from the Brazilian oil industry giant’s long-running bribery and kickback scheme and overstatement of assets
  • vindicated business judgment of Invesco mutual funds and their special litigation committee by securing dismissal of derivative lawsuit challenging redemptions of auction rate preferred securities
  • obtained a unanimous arbitration award for specific performance of sellers’ post-closing contingent payment obligations arising out of client-buyer’s $60 million acquisition of a global apparel labeling business
  • obtained a multimillion dollar settlement on the night before trial for local manufacturing company in a merger and acquisition dispute with global packaging company
  • defeated an emergency application for temporary restraints brought by 42 providers against a UnitedHealth Group managed care organization seeking to enforce the terms of its provider contracts
  • obtained dismissal of a RICO and tortious interference lawsuit brought against SPX Corporation subsidiary in the business of manufacturing of industrial ventilation equipment
  • obtained a reversal on appeal of an agency’s denial of a financial hardship exemption for a nonprofit entity to demolish an historically designated building
  • defended STMicroelectronics, a Swiss-based semiconductor company, against patent infringement claims relating to transistor design in high-speed integrated circuits
  • secured full release and dismissal of third-party claims against a wastewater treatment company with zero contribution to multiparty, six-figure settlement of Clean Water Act civil enforcement suit
  • represented UnitedHealth Group’s managed care organizations in dozens of evidentiary hearings involving challenges to due process and medical necessity determinations regarding Medicaid benefits
  • defended Ivera Medical Corporation, a California-based medical products company, in a series of related cases against patent infringement claims and validity challenges to patents concerning disinfecting products
  • contributed to numerous state and federal appellate, trial, and amici briefs on the scope and applicability of the First Amendment to regulation of religious institutions

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Bar Admissions
  • New Jersey
  • New York
  • Pennsylvania
Court Admissions
  • Pennsylvania Supreme Court
  • U.S. District Court for the Eastern District of Pennsylvania
  • U.S. District Court for the District of New Jersey
  • U.S. District Court for the Southern District of New York
  • J.D., cum laude, Temple University Beasley School of Law
  • B.A., Brown University

  • Chair, Stradley Ronon Hiring Committee
  • Board of Directors, Minds Matter of Philadelphia
  • Executive Committee, Brown Alumni Club of Philadelphia
  • Host Committee Chair, Back on My Feet Annual Bash



  • The Legal Intelligencer, "Lawyers on the Fast Track"
  • Leadership Council on Legal Diversity (LCLD) Fellow
  • Forum Of Executive Women’s Mentoring Program Graduate
  • United Way’s Young Leaders Program Graduate
  • Pennsylvania Super Lawyers, Rising Star
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