The following firms are believed to presently make a market in Gladstone Commercial Corporation stock on the NASDAQ
| Company | Phone | Address |
| Automated Trading Desk Financial Services, LLC | (843) 789-2000 | |
| Citadel Derivatives Group LLC | (312) 395-2100 | 32nd Floor |
| Citigroup Global Markets Holdings Inc. | (212) 816-6000 | 38th Floor |
| E*TRADE Capital Markets, LLC | (312) 294-7846 | 440 South LaSalle Street, Suite 3030 |
| Ferris, Baker Watts, Inc. | (410) 685-2600 | Ninth Floor |
| Jefferies & Company, Inc. | (212) 284-2300 | 12th Floor |
| Knight Equity Markets, LP | (201) 557-6844 | |
| Robert W. Baird & Co. Incorporated | (414) 765-3500 | |
| Stifel, Nicolaus & Company, Inc. | (314) 342-2000 | 501 North Broadway |
| Susquehanna Capital Group | (610) 617-2600 | Suite 220 |
| UBS Securities, LLC | (203) 719-1000 | Sixth Floor |