X0201 42003-12-180 0000318107 PRIMA ENERGY CORP PENG 0001228516 GUION DOUGLAS J 1099 18TH STREET SUITE 400 DENVER CO 80202-1908 1000Common stock2003-12-184M018900.00006.6700A29621.0000DCommon stock2003-12-184S018900.000034.3100D10721.0000DStock options6.67002003-12-184M018900.00000D2008-09-17Common stock18900.00000DStock options9.83002009-09-17Common stock5625.00005625.0000DStock options32.33002010-09-17Common stock5625.00005625.0000DStock options23.56002011-09-17Common stock5625.00005625.0000DStock options20.78002012-09-17Common stock5625.00005625.0000DStock options25.83002013-09-17Common stock5625.00005625.0000DStock options vest 20% per year over five years.Sandra J. Irlando as Attorney-in-Fact for Douglas J. Guion2003-12-19