The instructions for receiving the merger consideration of $5.25 per Series B preferred share will be sent to the Series B shareholders only after the Merger is consummated. The paying agent will then arrange for the prompt payment of the merger consideration to each Series B shareholder following receipt of the Series B preferred share certificates and other required documents. In the event that the Company and Five Mile are preliminarily enjoined from completing the Merger transaction, the merger agreement may terminate.

About Prime Group Realty Trust

Prime Group Realty Trust is a self-administered and self-managed real estate investment trust (REIT) which owns, manages, leases, develops and redevelops office and industrial real estate in metropolitan Chicago. The Company currently owns 1 office property containing an aggregate of 167,756 net rentable square feet and interests in one joint venture that owns one office property comprised of approximately 1.14 million net rentable square feet. The Company leases and manages approximately 1.31 million square feet comprising all of its wholly-owned properties and its 330 N. Wabash Avenue joint venture property. For more information about Prime Group Realty Trust, contact the Company's Chicago headquarters at (312) 917-1300 or visit its website at www.pgrt.com.

About Five Mile Capital Partners

Five Mile Capital Partners LLC is an alternative investment and asset management company established in 2003. The firm specializes in investment opportunities in real estate, debt products, structured finance, asset-based lending and financial services private equity. Five Mile’s Principals have significant experience, knowledge and skills relevant to the financial services industry and believe the cyclical and dynamic nature of the sector continually provides a broad opportunity for investments across the capital structure. The Firm’s headquarters are based in Stamford, Connecticut with an office in New York City. Five Mile has approximately $2 billion in assets under management. For more information, visit www.fivemilecapital.com.

This press release contains certain forward-looking statements which involve known or unknown risks, uncertainties or other factors not under the Company’s control which may cause the actual results, performance or achievement of the Company to be materially different from the results, performance or other expectations implied by these forward-looking statements.