EXHIBIT 21 MGIC INVESTMENT CORPORATION DIRECT AND INDIRECT SUBSIDIARIES OF MGIC INVESTMENT CORPORATION1 1. MGIC Assurance Corporation 2. MGIC Credit Assurance Corporation 3. MGIC Insurance Services Corporation 4. MGIC Investor Services Corporation 5. MGIC Mortgage Insurance Corporation 6. MGIC Mortgage Marketing Corporation 7. MGIC Mortgage Reinsurance Corporation 8. MGIC Mortgage Securities Corporation 9. MGIC Reinsurance Corporation 10. MGIC Reinsurance Corporation of Wisconsin 11. MGIC Residential Reinsurance Corporation 12. MGIC Surety Corporation 13. Mortgage Guaranty Insurance Corporation 14. Mortgage Guaranty Reinsurance Corporation 15. Wisconsin Mortgage Assurance Corporation - -------- 1 All subsidiaries listed are 100% directly or indirectly owned by the registrant and all are incorporated in Wisconsin.