Russ Savage, who sold Rockstar to PepsiCo for more than $4 billion, now controls roughly 4.7% of Celsius Holdings stock

Rockstar Energy founder Russ Savage told CNBC he now controls 12 million shares of Celsius Holdings, amounting to roughly 4.7% of the energy drink company.

"Savage said he's offering to take over as CEO before the problems become too deep to fix. When building..."