Post Holdings Q1 2026 Earnings Strong EPS Beat Masks Mixed Underlying Performance Valvoline Q1 2026 Earnings Strong EPS Beat Highlights Operational Discipline Rubrik Inc RBRK Q1 2026 Earnings Strong EPS Surprise Signals Operating Leverage Canaan Inc Q1 2026 Earnings Deep EPS Miss Signals Continued Headwinds WD Q1 2026 Earnings EPS Surges Past Estimates by Over 62 AERT Q1 2026 Earnings Profitability Achieved Despite Limited Disclosure