Share option plans (Tables)

12 Months Ended

Dec. 31, 2012

The following summarizes share option transactions related to the Seadrill Scheme in 2012, 2011 and 2010:

	2012				2011					2010
	Options		Weighted average exercise price US$		Options			Weighted average exercise price US$		Options			Weighted average exercise price US$

Outstanding at beginning of year		5,420,438		26.16		5,512,400			20.30		6,199,833			13.87
Granted		181,012		37.41		1,786,771			34.68		1,910,000			29.94
Exercised		(1,415,000)		16.39		(1,638,165	)		16.33		(2,329,000	)		11.88
Forfeited		(312,559)		30.84		(240,568	)		21.98		(268,433	)		14.99
Outstanding at end of year		3,875,891		29.88		5,420,438			26.16		5,512,400			20.30
Exercisable at end of year		1,164,214		21.19		1,598,412			19.82		1,645,333			16.03