Executives Legend
The color legend to the right illustrates the various backgrounds for the top executives in the residential real estate industry.

Sean Black

Co-Founder and CEO, 
2024 Rank: 114
Black leads Knock, which launched in 2015 with a twist on the iBuying business model in which the company made all-cash offers on behalf of sellers’ next homes. In 2021, it unveiled a cash-backed offer service for buyers. The company raised $220 million in 2022 but has been relatively quiet as this alternative finance category and its offerings look to gain traction with the changing market.