Shares of Weight Watchers International Inc. rose more than 8% late Tuesday after the company reported fourth-quarter earnings and sales that beat Wall Street expectations. Weight Watchers said it earned $63 million, or 91 cents a share, in the quarter, compared with $13 million, or 20 cents a share, in the year-ago period. Revenue rose to $313 million, compared with $267 million a year ago. Analysts polled by FactSet had expected earnings of 31 cents a share on sales of $309 million. “We had a highly positive consumer response to the launch of our WW Freestyle program in December, which resulted in a strong finish to the year,” and the company ended 2017 with about 600,000 more members than a year ago, Chief Executive Mindy Grossman said in a statement. The “excellent momentum” has carried into 2018, she said. Weight Watchers said it expects sales around $1.55 billion and per-share earnings in a range between $2.40 and $2.70 for the year. The analysts surveyed by FactSet expect 2018 EPS of $1.90 on sales of $1.44 billion. Weight Watchers shares ended the regular trading day down 2.6%.