This presentation characterizes the familial links between chronic tic disorders, OCD, and ADHD, drawing on findings from an investigation of familial aggregation patterns in first-degree relatives of children with chronic tics (N=1,153) or OCD (N=344). Findings indicate elevated parental prevalence across disorders, where nearly three in four children with chronic tics or OCD have at least one parent affected by tics, OCD, or ADHD. We examine parental prevalence of individual and complex phenotypes relative to sex-specific population rates, highlighting differences in familial aggregation patterns between children with chronic tics and those with OCD, and demonstrating that children with both disorders (OCD + chronic tics) have family profiles that more closely resemble the profile of children with chronic tics, rather than children with OCD. Finally, we assess variation in familial clustering according to characteristics of the affected child, providing evidence that male and female children exhibit similar patterns of familial risk.