X0202 4 2005-10-03 0000043704 GREEN MOUNTAIN POWER CORP GMP 0001247227 DUTTON CHRISTOPHER L 163 ACORN LANE COLCHESTER VT 05446 1 1 0 0 Chief Executive Officer Common Stock 2005-10-03 4 M 0 1000 7.9 A 28316.0417 D Common Stock 2005-10-03 4 S 0 1000 32.68 D 27316.0417 D Common Stock 5934.2688 I By 401(k) plan Common Stock 60.2459 I By wife for daughter Common Stock 60.2459 I By wife for son Stock Options (Right to buy) 7.9 2005-10-03 4 M 0 1000 0 D 2010-08-22 Common Stock 1000 50000 D Includes 129.9212 shares acquired between July 1, 2005 and October 3, 2005 under the GMP 401(k) plan. The information in this report is based on a plan statement as of October 3, 2005. These shares are held by the reporting person's wife as custodian for daughter under Uniform Gifts to Minors Act. The Option is currently exercisable for 50,000 shares. The exercise of stock options and the sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 29, 2004. These shares are held by the reporting person's wife as custodian for son under Uniform Gifts to Minors Act. Donald J. Rendall, Jr., Attorney-In-Fact 2005-10-04