On April 1, 2026, the Ninth Circuit handed California employers a meaningful win in O’Dell v. Aya Healthcare Services, Inc., No. 25-1528. The court reversed a Southern District of California ruling that had used a procedural doctrine—non-mutual offensive collateral estoppel—to invalidate arbitration agreements for more than 250 opt-in plaintiffs based on two prior arbitrator decisions

This Friday’s Five covers five employment law developments that occurred in August 2015 that will have an impact for employers in California.

1)     NLRB ruling widens which companies may be considered “joint employers”

In a 3-2 decision, the NLRB ruled that Browning-Ferris Industries of California, Inc. was a joint employer with a staffing agency, Leadpoint