Keystone National Properties Joins ADISA Keystone National Properties, a New York-based real estate and private equity sponsor, joins the Alternative & Direct Investment Securities Association (ADISA). News provided by Share this article Share this article JERICHO, N.Y., May 7, 2021 /PRNewswire/ -- Keystone National Properties (KNPRE), a real estate and private equity firm that specializes in impact and tax advantaged investment opportunities, has joined the Alternative & Direct Investment Securities Association (ADISA) reflecting the firm's commitment to engaging with organizations that advocate for the alternative investment industry, building relationships to ensure access to data and expert insights, and giving back by donating our time and energy.