Complex sentence: Long & Foster (founded 1968) is the largest privately-owned real estate company in the United States with over 15,000 agents in nearly 230 sales offices in the Mid-Atlantic region.
Split into simpler sentences: Long & Foster (founded 1968) is the largest privately-owned real estate company in the United States. Over 15,000 agents represent Long & Foster Real Estate in nearly 230 sales offices in the Mid-Atlantic region.