CHESAPEAKE, Va.--(BUSINESS WIRE)--Dollar Tree (NASDAQ: DLTR) is marking 40 years of bringing incredible value to customers with two milestones that celebrate its roots and invest in its future: the opening of its 9,500th store in Suffolk, Virginia, and a $40 million investment through the newly established Dollar Tree Impact Fund to expand access to everyday essentials and support the well-being of the communities where Dollar Tree operates across the U.S. and Canada. "Forty years ago, Dollar T.