X0303 4 2010-01-04 0 0001091171 BLUE NILE INC NILE 0001287613 VADON MARK C C/O BLUE NILE, INC. 705 FIFTH AVENUE S, STE 900 SEATTLE WA 98104 1 1 0 0 Executive Chairman Common Stock 2010-01-04 4 S 0 31700 63.2358 D 339690 D Common Stock 2010-01-05 4 S 0 45071 62.4645 D 294619 D Common Stock 2010-01-06 4 S 0 18700 62.1196 D 275919 D This sale was affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Represents the weighted average sale price. The highest price at which shares were sold was $64.38 and the lowest price at which shares were sold was $62.64. Represents the weighted average sale price. The highest price at which shares were sold was $63.00 and the lowest price at which shares were sold was $62.00. Represents the weighted average sale price. The highest price at which shares were sold was $63.01 and the lowest price at which shares were sold was $62.00. /s/ Diane M. Irvine, Power of Attorney 2010-01-06