| Entity | Property | |
| 77 West Wacker Limited Partnership (3), (4) | Sole member of 330 N. Wabash Avenue Mezzanine, L.L.C. and 99.5% owner of Brush Hill Office Center, L.L.C. | |
| 180 N. LaSalle Holdings, L.L.C. (1), (3) | Sole member of 180 N. LaSalle II, L.L.C. | |
| 180 N. LaSalle II, L.L.C. (1), (3) | 180 N. LaSalle | |
| 280 Shuman Blvd., L.L.C. (1), (3) | 280 Shuman Blvd. (Atrium) | |
| 330 N. Wabash Avenue, L.L.C. (1), (3) | 330 N. Wabash Avenue | |
| 330 N. Wabash Mezzanine, L.L.C. (1), (3) | Sole member of 330 N. Wabash Avenue, L.L.C. | |
| 330 Redevelopment LLC (1) | Performs certain work at 330 N. Wabash Avenue | |
| 800 Jorie Blvd., L.L.C. (1), (3) | Former owner of 800-810 Jorie Blvd. | |
| 800 Jorie Blvd. Mezzanine, L.L.C. (1), (3) | Former member owning 49.0% of 800 Jorie Blvd., L.L.C. (50.5% is owned by Prime Group Realty, L.P.) | |
| 1051 N. Kirk Road, L.L.C. (1), (3) | Former owner of 1051 N. Kirk Road | |
| 1600 167th Street, L.L.C. (1), (3) | Former owner of 1600-1700 167th Street (Narco River Business Center) | |
| 2305 Enterprise Drive, L.L.C. (1), (3) | 2305 Enterprise Drive | |
| 4343 Commerce Court, L.L.C. (1), (3) | 4343 Commerce Court (The Olympian Office Center) | |
| 7100 Madison, L.L.C. (1) | 7100 Madison Avenue | |
| Brush Hill Office Center, L.L.C. (1), (3) | Brush Hill Office Center | |
| Continental Towers, L.L.C. | Owner of Tower I, Tower III and the Commercium at 1701 Golf Road | |
| Continental Towers Associates II, LLC | Sole member of Continental Towers Associates III, LLC | |
| Continental Towers Associates III, LLC | Owner of Tower II at 1701 Golf Road | |
| CTA General Partner, LLC | Sole member of Continental Towers, L.L.C. | |
| CTA Member, Inc. | Sole member of CTA General Partner, LLC | |
| Dearborn Center, L.L.C. (1), (5) | Former owner of Citadel Center | |
| LaSalle-Adams, L.L.C. (1), (3) | Former owner of 208 South LaSalle Street | |
| PGR Finance II, Inc. (6) | Former member owning 1% of LaSalle-Adams, L.L.C. | |
| PGR Finance IV, Inc. (6) | Former member owning 0.1% of 1600 167th Street., L.L.C. | |
| PGR Finance VIII, Inc. (6) | Limited Partner owning 0.5% of 77 West Wacker Limited Partnership | |
| Entity | Property | |
| PGR Finance XIV, Inc. (6) | Member owning 0.1% in both 1051 N. Kirk Road, L.L.C. and 4343 Commerce Court, L.L.C. | |
| PGR Finance XV, L.L.C. (1), (3) | Member owning 0.5% of Brush Hill Office Center, L.L.C. | |
| PGR Finance XVII, Inc. (6) | Former member owning 0.5% of 800 Jorie Blvd., L.L.C. | |
| PGR Finance XXI, L.L.C. (1) | Member owning 0.1% of 2305 Enterprise Drive, L.L.C. | |
| PGR Finance XXII, Inc. (6) | Member owning 1% of 180 N. LaSalle Holdings, L.L.C. | |
| PGRLP77 Manager LLC (1) | Former manager of 77 W. Wacker Drive | |
| PGRLP131 Manager LLC (1) | Manager of Citadel Center, 131 S. Dearborn St. | |
| PGRS 1407 BWAY LLC (1) | Asset and Development Manager of 1407 Broadway Avenue, New York, NY | |
| PGRT Equity LLC (1) | Owner of (i) junior loans encumbering Continental Towers, (ii) 50% common interest in 77 West Wacker Drive, L.L.C., (iii) 280 Shuman Blvd., L.L.C., (iv) 800 Jorie Blvd. Mezzanine, L.L.C., and (v) Prime Group Management, L.L.C. | |
| PGRT Equity II LLC (1) | Member owning 99.0% of 180 N. LaSalle Holdings, L.L.C. | |
| PGRT ESH, Inc. (6) | Former owner of interest in BHAC Capital IV, LLC | |
| PGT Construction Co. (6) | Subsidiary of Services Company for construction work | |
| Phoenix Office, L.L.C. (1) | Owner of 23.1% interest in Plumcor/Thistle, L.L.C., owner of a building in Thistle Landing in Phoenix, Arizona | |
| Prime Group Management, L.L.C. (1), (3) | Manager of Continental Towers | |
| Prime Group Realty Services, Inc. (7) | The Services Company, owner of 100% of PGT Construction Co., PRS Corporate Real Estate Services, Inc., Prime Services Holdings, Inc. and 99.9% of 77 Fitness Center, L.P. | |
| Prime Rolling Meadows, L.L.C. (1) | Property adjacent to Continental Towers | |
| PGRT Realty Services, Inc. (6) | Brokerage subsidiary of Services Company, formerly known as PRS Corporate Real Estate Services, Inc. |
| (1) | Delaware Limited liability Company | |
| (2) | PGRT Equity LLC, a subsidiary of the Operating Partnership, owns a 50% common interest, PGRLP 77 Manager LLC, a subsidiary of the Operating Partnership, manages the property and a third party owns the remaining 50% common interest. | |
| (3) | We own both direct and indirect ownership interest in these entities through wholly owned subsidiaries listed above. | |
| (4) | Illinois Limited Partnership. | |
| (5) | PGRT Equity LLC, a subsidiary of the Operating Partnership owns a 30% subordinated common interest, the Operating Partnership manages the property and a third party owns the remaining 70% common interest. | |
| (6) | Delaware Corporation. | |
| (7) | Maryland Corporation. |