Steak 'n Shake said franchise-partner same-store sales rose 19% in Q3 2026, extending double-digit growth since the chain began accepting Bitcoin through the Lightning Network in May 2025. Biglari Holdings' SEC filings showed domestic same-store sales growth of 10.0% in Q1 2026 and 11.9% in Q2, while franchise-partner sales increased about 13% and 14.5%, respectively. The company has said Bitcoin payments cut processing costs by 50% relative to credit cards and has added $10 million of Bitcoin exposure to a strategic reserve. The available disclosures do not isolate Bitcoin payments as the cause of the sales growth, which Biglari also attributed partly to food-quality improvements and communications that resonated with customers.