X0303 4 2008-06-30 0 0000893538 ST MARY LAND & EXPLORATION CO SM 0001406892 Leyendecker Gregory T 1776 LINCOLN ST. SUITE 700 DENVER CO 80203 0 1 0 0 VP-Regional Manager Common Stock; $.01 Par Value 2008-06-30 4 J 0 152 32.8185 A 869 D Restricted Stock Units 2008-07-01 4 A 0 3156 0 A Common Stock 3156 3156 D The reporting person purchased the shares of the issuer's common stock on June 30, 2008, through the issuer's Employee Stock Purchase Plan. Each restricted stock unit represents a contingent right to receive one share of stock. This restricted stock unit grant vests in three equal annual installments beginning on December 15, 2008. The vested shares will be issued to the reporting person on the vesting dates, at which time all restrictions on the vested shares will lapse. Karin M. Writer (Attorney-In-Fact) 2008-07-02