AutoZone Tuesday posted a better-than-expected 7 percent increase in first-quarter profit, helped by the sale of higher-profit products, sending shares of the largest U.S. auto parts retail chain up about 12 percent.

Net income at the company , whose largest shareholder is hedge fund manager Edward Lampert, was $132.5 million, or $2.02 per share, in its fiscal quarter ended Nov. 17, up from $123.9 million, or $1.73 per share, a year earlier. Analysts polled by Reuters Estimates had expected $1.91 a share.