Energy drink maker Celsius Holdings Inc. has entered a definitive agreement to acquire Alani Nutrition LLC for $1.8 billion, including $150 million in tax assets for a net purchase price of $1.65 billion.

The purchase allows Celsius to add a fast-growing beverage popular with young women while better positioning it to compete against rivals Red Bull and Monster.

Celsius climbed to No. 9 among all U.S. liquid refreshment brands after ranking 90th five years ago, and it wants to build on that growth by continuing to redefine