About Flock. There are 17 million Americans who own rental property. Most don't want to be landlords anymore, but selling isn’t a good option. Why. You’d lose income and appreciation, trigger tax liabilities, kick out your tenants, have to fix up the house – the list goes on. Flock is here to help. Flock’s mission is to provide every retiring landlord with the most cost-efficient and seamless exit. Our first product is a tech-enabled 721 Exchange...