BBB Foods operates Tiendas 3B, Mexico's leading hard discount grocery retailer. The stores carry a deliberately limited assortment of roughly 850-900 SKUs — everyday grocery staples like packaged foods, beverages, household consumables, and personal care products — sold at very low prices in small-format stores (300-450 sq meters) located within walking distance of customers' homes. As of year-end 2025, Tiendas 3B operated 3,346 stores across 17 Mexican states, with customers visiting three to four times per week. The business is entirely physical with no online channel. The core customer is a low-to-middle income female homemaker aged 30-60. Tiendas 3B's model works by concentrating volume across a narrow SKU set, giving the company significant purchasing leverage with suppliers. Private label products — manufactured by contract suppliers and priced below branded equivalents — represented 58% of merchandise sales in 2025, up from 47% in 2023, and carry higher gross margins. Because customers pay at the point of sale while suppliers are paid on extended terms, the business runs negative working capital, which self-funds store expansion. New stores target roughly MXN5.5M in capex and a ~26-month payback. The company opened 574 net new stores in 2025 and guided for 590-630 more in 2026, organized through a decentralized regional model where each region supports up to 200 stores from a single distribution center. Management estimates white space for at least 11,000 additional stores in Mexico.