In post-market trading, shares had taken off 15.1% to $52.39.
Over fiscal 2013, the health and wellness retailer reported revenue of $2.63 billion, 8.2% higher than 2012. However, sales fell short of expectations for $2.65 billion, according to analysts surveyed by Thomson Reuters.
Full-year net income of $2.85 a share was 2 cents under consensus.
In the three months to December, revenue of $613.7 million came in 8.6% higher on the year-ago quarter, but missed expectations by around $18 million.
The Pittsburgh-based business saw same-store sales increase 5% in domestic company-owned stores over the fourth quarter, the company's thirty-fourth consecutive quarter of growth.
Net income of 63 cents a share was 26% higher than the year-ago quarter, but missed consensus by a penny.
"Despite the challenging retail environment, our business performed well, generating solid top- and bottom-line growth in the quarter," said CEO Joe Fortunato in a statement.
For fiscal 2014, management forecast earnings between $3.18 and $3.24 a share, below expectations of $3.46 a share.
A high-single-digit increase in revenue is expected over the full year.
"This is based on achieving a domestic company-owned same store sales result including the impact of GNC.com of flat for the first quarter of 2014 reflecting a very challenging January and February retail environment, and a mid-single-digit increase for the remainder of 2014," the company said in a statement.
TheStreet Ratings team rates GNC HOLDINGS INC as a Buy with a ratings score of B. The team has this to say about their recommendation:
"We rate GNC HOLDINGS INC (GNC) a BUY. This is driven by some important positives, which we believe should have a greater impact than any weaknesses, and should give investors a better performance opportunity than most stocks we cover. The company's strengths can be seen in multiple areas, such as its revenue growth, notable return on equity, solid stock price performance, impressive record of earnings per share growth and good cash flow from operations. We feel these strengths outweigh the fact that the company has had generally high debt management risk by most measures that we evaluated."
- You can view the full analysis from the report here: GNC Ratings Report