Woodard v. OpenAI, Inc. and Mixpanel, Inc., No. 3:25-cv-10301 (N.D. Cal.)

Summary

Jon Woodard filed a proposed class action on December 1, 2025, against OpenAI and its analytics vendor Mixpanel, alleging negligence, breach of implied contract and unjust enrichment after a November 2025 data breach at Mixpanel exposed OpenAI users' names, email addresses, approximate locations, operating system and browser details and user IDs. On May 8, 2026, the plaintiff voluntarily dismissed his claims against both defendants without prejudice, each side bearing its own fees and costs. There was no ruling on the merits and no settlement was recorded.

Key dates

1. December 1, 2025Filed
2. May 8, 2026Resolved
3. October 16, 2026Checked against sources
4. October 21, 2026Checked against sources

Developments are added when the record is reviewed. Next review: October 16, 2027.

Evidence

Each passage is quoted from its source. The quoted passages are re-checked against the live pages every month.

1. Defendants confirmed experiencing a data breach in November 2025

   Supports: Breach and defendants; complaint filed 12/01/25

   Class Action Complaint, Dkt. 1, No. 3:25-cv-10301 (N.D. Cal.) U.S. District Court, N.D. Cal. (via RECAP) Primary source

2. are voluntarily dismissed without prejudice, with each party to bear

   Supports: Dismissal without prejudice, dated May 8, 2026

   Notice of Voluntary Dismissal Without Prejudice, Dkt. 43, No. 3:25-cv-10301 (N.D. Cal.) U.S. District Court, N.D. Cal. (via RECAP) Primary source