The US fast‑food market is tightening as beef costs rise and more burger chains compete. McDonald’s, with a $190bn market value, has long flipped about half of US burgers, while Burger King and Wendy’s saw shares fall from 28% in 2007 to 21% last year.

In Q2 2026 Burger King posted 8.5% same‑store sales growth versus just 0.8% at McDonald’s. Over four years it invested roughly $2bn in the US, refurbishing more than half its restaurants, which lifted sales 15‑20% the following year. It also simplified pricing and improved burger quality, now scoring higher than McDonald’s on taste, quality and order accuracy.

Wendy’s, recently overtaken by Burger King in US burger sales, is closing weaker units and may face aggressive restructuring if activist Nelson Peltz takes it private. Investors have narrowed the valuation discount between Restaurant Brands International (owner of Burger King) and McDonald’s from 34% to about 10%.

While McDonald’s retains unmatched scale, the intensifying rivalry signals a leaner period ahead for the Golden Arches.