Being from the northeast, I hadn't even heard of Menards until I saw them mentioned often on this site. So out of curiosity I Googled the largest Home Improvement retailers. #1: Home Depot- $108B in sales, #2: Lowes- 73B, #3: Menards- 10B, #4: Tractor Supply- $8B, #5: 84 Lumber 4B. Big business!
For comparison Walmart- 514B.