The Graham Packaging deal came just one year after the US$6.5 billion takeover of Illinois-based Pactiv.
Hart started building his packaging empire in Reynolds Group in 2006 with his takeover of Carter Holt Harvey, adding Alcoa's packaging business the following year. He later bought International Paper's beverage packaging unit and Swiss company SiG.
As at December 31, the company had amassed total assets worth US$21.89 billion on total liabilities of US$22.07 billion.
In February, Reynolds Group raised US$1.25 billion of new debt to refinance bonds set to mature in 2017 and add to its cash buffer.
Chief financial officer Allen Hugli told analysts the packaging group has some extra cash on its balance sheet which acts as a liquidity buffer, with some US$1.2 billion in cash at the end of the calendar year.
"The owner and all of us are relatively conservative people so we always like to have a bit of extra cash sloshing around," Hugli said. "We don't need all of it but we certainly like to have it there. It's a nice safety blanket to have."
Reynolds Group revenue climbed 74 per cent to US$11.79 billion in the year, with adjusted EBITDA up almost 70 per cent to US$2.53 billion. The packaging company widened its bottom line loss to US$417 million from US$97 million a year earlier.