Herbalife expects its fiscal fourth-quarter and full-year adjusted earnings will come in above Wall Street's expectations.
The company also announced a $1 billion notes offering and increased its stock repurchase program by $500 million to $1.5 billion.
The stock rose in Monday premarket trading.
Herbalife, which is incorporated in the Cayman Islands and based in Los Angeles, uses a network of distributors to sell its nutritional supplements and weight-loss products globally. Last month U.S. Sen. Edward Markey called for an investigation into the company's business practices. The company said in a statement at the time that it looked forward to an opportunity to "introduce the company to (Markey) and address his concerns at his earliest convenience."
This is not the first time Herbalife has had questions raised about its business structure.
Hedge fund manager William Ackman accused it in 2012 of operating a pyramid scheme, in which a company makes most of its money by recruiting new salespeople, rather than on the products that they sell. Herbalife has repeatedly denied the claims and rival investor Carl Icahn has disagreed as well, taking his fight against Ackman public and increasing his stake in the company.
For the period ended Dec. 31, Herbalife anticipates adjusted earnings between $1.26 and $1.30 per share. Analysts polled by FactSet predict fourth-quarter earnings of $1.16 per share.
Herbalife expects full-year adjusted earnings in a range of $5.35 to $5.39 per share. Wall Street is calling for $5.25 per share.