O'Reilly Automotive, Inc. provided earnings guidance for the full year ending December 31, 2021. For the year, the company expects comparable store sales to be -2% to 0%. Total revenue is expected to be in the range of $11.5 billion to $11.8 billion. Operating income as a percentage of sales is expected to be 19.0% to 19.5%. Diluted earnings per share is expected to be in the range of $22.70 to $22.90.