MRA Group To Acquire DuPont's 800K SF Chestnut Run Laboratory Campus in Wilmington Delaware Plan is to transform space into Delaware's premier innovation destination News provided by Share this article Share this article HORSHAM, Pa., Dec. 29, 2020 /PRNewswire/ -- MRA Group, a privately-held, regional real estate solutions firm based in Pennsylvania, today announced it has signed a letter of intent with DuPont to acquire the Chestnut Run Laboratory campus for redevelopment. Under the terms of the agreement, DuPont will continue to be a tenant at several lab buildings on the site following the transaction, which is expected to close by 3Q 2021.