Mortimer v. McCool

Pennsylvania Supreme Court

Question(s) Presented

Whether, in this matter of first impression, the Supreme Court should adopt the "enterprise theory" or "single entity" theory of piercing the corporate veil to prevent injustice when two or more sister companies operate as a single corporate combine?

Tab Group

Merits Stage

Pennsylvania Supreme Court reverses Superior Court and rejects expansive theory for piercing the corporate veil between sister companies

July 21, 2021

Click here to view the opinion.

U.S. Chamber files coalition brief urging Pennsylvania Supreme Court to reject “enterprise” and “single entity” theories for piercing the corporate veil between “sister” companies

September 8, 2020

Click here to view the coalition amicus brief. Robert L. Byer, Jessica Priselac, and Leah A. Mintz of Duane Morris LLP served as co-counsel for the coalition.

Case Documents

U.S. Chamber, et al. Amicus Brief -- Mortimer v. McCool (Pennsylvania Supreme Court).pdf

Opinion -- Mortimer v. McCool (Pennsylvania Supreme Court).pdf