Key Takeaways The rivalry between The Home Depot Inc. (HD) and Lowe's Companies Inc. (LOW) defines the U.S. home improvement retail market. As the industry's two largest players, both companies serve do-it-yourself shoppers, professional contractors and homeowners seeking tools, building materials, appliances, décor and renovation solutions. Yet their market positions are not identical. Home Depot remains the clear leader, supported by greater scale, a stronger professional customer base and higher sales pr ...