X0303 4 2011-06-10 0 0000077877 PETROLEUM DEVELOPMENT CORP PETD 0001195389 SWOVELAND JEFFREY C 1775 SHERMAN STREET SUITE 3000 DENVER CO 80203 1 0 0 1 Chairman Common Stock 2011-06-10 4 A 0 3633 0 A 19872 D These shares acquired pursuant to the 2010 Long Term Compensation Plan will vest ratably over three years, beginning on July 1, 2012 (or earlier under certain circumstances). /s/ Jeffrey C. Swoveland 2011-06-13