Rubrik (RBRK) Stock Before the Bell on December 8, 2025: AI Security Breakout, Earnings Shock, and What Traders Should Watch
Rubrik, Inc. heads into the U.S. stock market open on Monday, December 8, 2025, riding one of its sharpest rallies since listing. After a blowout fiscal Q3 2026 report and a flurry of AI‑related product and marketing announcements, the data‑security and AI‑operations company has suddenly become one of Wall Street’s most watched AI names.