Mistake, rather than misnomer, in naming proper defendant leads to dismissal

Plaintiff sued the wrong corporate entity, and did not seek leave to amend her complaint until after the statute of limitations expired.  Attorney Michael Radak defended the case and was successful on another dispositive motion in favor of the defendant. Despite sharing a corporate office and a registered agent, the Court held that plaintiff’s naming the wrong entity was a mistake and not a misnomer, and the case was dismissed with prejudice.