EXHIBIT 21 SUBSIDIARIES OF GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY SUBSIDIARIES OF GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY JURISDICTION OF INCORPORATION OR ORGANIZATION SUBSIDIARY Alta Health & Life Insurance Company Indiana AH&L Agency, Inc. New York Benefits Communication Corporation (1) Delaware BenefitsCorp Equities, Inc. Delaware Deferred Compensation of Michigan, Inc. Michigan Financial Administrative Services Corporation (2) Colorado First Great-West Life & Annuity Insurance Company New York Great-West Benefit Services, Inc. Delaware Great-West Realty Investments, Inc. Delaware Greenwood Investments, Inc. Colorado Greenwood Property Corporation Colorado GW Capital Management, LLC Colorado GWL Properties, Inc. Colorado Maxim Series Fund, Inc. Maryland National Plan Coordinators of Delaware, Inc. Delaware National Plan Coordinators of Ohio, Inc. Ohio National Plan Coordinators of Washington, Inc. Washington NPC Administrative Services Corporation Delaware NPC Securities, Inc. California One Corporation Colorado One Health Plan, Inc. Vermont One Health Plan of Alaska, Inc. Alaska One Health Plan of Arizona, Inc. Arizona One Health Plan of California, Inc. California One Health Plan of Colorado, Inc. Colorado One Health Plan of Florida, Inc. Florida One Health Plan of Georgia, Inc. Georgia One Health Plan of Illinois, Inc. Illinois One Health Plan of Indiana, Inc. Indiana One Health Plan of Maine, Inc. Maine One Health Plan of Massachusetts, Inc. Massachusetts One Health Plan of Nevada, Inc. Nevada One Health Plan of New Hampshire, Inc. New Hampshire One Health Plan of New Jersey, Inc. New Jersey One Health Plan of North Carolina, Inc. North Carolina One Health Plan of Ohio, Inc. Ohio One Health Plan of Oregon, Inc. Oregon One Health Plan of South Carolina, Inc. South Carolina One Health Plan of Tennessee, Inc. Tennessee One Health Plan of Texas, Inc. Texas One Health Plan of Washington, Inc. Washington One Health Plan of Wyoming, Inc. Wyoming One of Arizona, Inc. Arizona One Orchard Equities, Inc. Colorado Orchard Capital Management, LLC Colorado Orchard Series Fund Delaware Orchard Trust Company Colorado P.C. Enrollment Services & Insurance Brokerage, Inc. Massachusetts Renco, Inc. Delaware (1) Also doing business as Benefits Insurance Services, Inc. (2) Also doing business as Financial Administrative Services Corporation of Colorado.