Matthew P. Sigel

Keystone Property Group acquires, develops, and manages commercial real estate in the office, flex and industrial sectors. As a vertically integrated real estate organization, Keystone manages private equity funds which invest in opportunistic real estate projects that are well located, but underperforming, undercapitalized, and functionally obsolete. It applies a focused, strategic investment plan to each opportunity, which in turn drives its success in delivering superior value to all stakeholders. Its services include operating real estate assets, making real estate investments, managing relationships with operating partners, and executing real estate capital market transactions.

Bday LLC provides commercial real estate services. The company is headquartered in Ambler, PA.

124 Maple Street LLC provides commercial services. The company is headquartered in Ambler, PA.

Part of Brandywine Realty Trust, Brandywine Midatlantic LP provides commercial real estate services. The company is based in Philadelphia, PA. Brandywine Midatlantic was acquired by Brandywine Realty Trust on September 21, 2004 for $600 million.