March 16, 2026
Court of Appeal, Second Appellate District, Division Seven
The Rule of Clapkin v. Levin is that a cross-complaint does not arise from protected litigation activity under Code of Civil Procedure section 425.16 when the claims are based on the defendant's unprotected business conduct that supplies the elements of liability, even where the cross-complaint references prior litigation for context and evidence, under circumstances where the same dispute would exist absent the litigation activity.