1. Costco's Q1 revenue reached $67.31 billion, surpassing estimates. 2. Earnings per share of $4.50 exceeded analyst expectations of $4.27. 3. Membership fees increased to $1.33 billion from $1.17 billion year-over-year. 4. Analysts gave generally positive ratings despite some price target adjustments. 5. Stock fell 1.4% post-earnings announcement, trading at $872.06.