Exhibit 99.1 Wayfair Announces Fourth Quarter and Full Year 2023 Results, Returns to Positive Year-Over-Year Active Customer Growth Q4 Net Revenue of $3.1 billion with 22.4 million Active Customers BOSTON, MA — February 22, 2024 — Wayfair Inc. (“Wayfair,” “we,” or “our”) (NYSE: W), one of the world’s largest destinations for the home, today reported financial results for its fourth quarter and full year ended December 31, 2023. Fourth Quarter 2023 Financial Highlights • Total net revenue of $3.1 billion inc ...