Walmart Has 23.6% of U.S. Grocery Sales - But Costco Owns the AI Answer - 5W Grocery Retail AI Visibility Index 2026

Walmart Owns 21% of U.S. Grocery — But Costco Owns the AI Answer NEW YORK, May 7, 2026 /PRNewswire/ -- 5WPR, the premier AI communications firm in the United States, today released the U.S. Grocery Retail AI Visibility Index 2026 — the 11th installment in 5W's AI Visibility Index research...