X0202 4 2007-11-09 0 0000277158 SEMCO ENERGY INC SEN 0001201754 DUBAY EUGENE N 558 W. LINCOLN BIRMINGHAM MI 48009 0 1 0 0 Sr. Vice Pres. of Operations Common Stock 2007-11-09 4 D 0 17098 8.15 D 0 D Common Stock 2007-11-09 4 D 0 4274.4269 8.15 D 0 I by 401(k) plan Non-Qualified Stock Option (right to buy) 4.61 2007-11-09 4 D 0 30000 3.54 D 2014-12-09 Common Stock 30000 0 D Non-Qualified Stock Option (right to buy) 5.39 2007-11-09 4 D 0 21584 2.76 D 2016-03-15 Common Stock 21584 0 D Non-Qualified Stock Option (right to buy) 5.775 2007-11-09 4 D 0 20000 2.375 D 2014-03-01 Common Stock 20000 0 D Non-Qualified Stock Option (right to buy) 6.15 2007-11-09 4 D 0 11152 2 D 2015-03-07 Common Stock 11152 0 D This option, which provided for vesting in 3 equal annual installments beginning 9/2/05, was canceled pursuant to share exchange agreement between the issuer, Cap Rock Holding Corporation & Semco Holding Corporation in exchange for a cash payment representing the difference between the common stock exchange price ($8.15 per share) and the exercise price of the option. This option, which provided for vesting of 33% on 3/15/07, 33% on 3/15/08 & 34% on 3/15/09, was canceled pursuant to share exchange agreement between the issuer, Cap Rock Holding Corporation & Semco Holding Corporation in exchange for a cash payment representing the difference between the common stock exchange price ($8.15 per share) and the exercise price of the option. This option, which provided for vesting in 3 equal annual installments beginning 3/1/05, was canceled pursuant to share exchange agreement between the issuer, Cap Rock Holding Corporation & Semco Holding Corporation in exchange for a cash payment representing the difference between the common stock exchange price ($8.15 per share) and the exercise price of the option. This option, which provided for vesting in three approximately equal annual installments beginning 3/1/06, was canceled pursuant to share exchange agreement between the issuer, Cap Rock Holding Corporation & Semco Holding Corporation in exchange for a cash payment representing the difference between the common stock exchange price ($8.15 per share) and the exercise price of the option. By: Sherry L. Abbott For: Eugene N. Dubay 2007-11-09