ATLANTA — That was fast. Four months after The Coca-Cola Co. announced plans to acquire a 10% stake in Keurig Green Mountain, Waterbury, Vt., for approximately $1.25 billion, company filings with the Securities and Exchange Commission show the beverage maker plans to increase its stake to 16%. Pursuant to the agreement the companies announced on Feb. 5, Coca-Cola had an option to increase its stake to 16%.

In a statement, The Coca-Cola Co. said the investment demonstrates its belief Keurig Green Mountain has substantial growth potential.

In addition to Coca-Cola’s initial investment that was announced in February, the two companies announced plans to develop a home brewing system called Keurig Cold. The new system is expected to be introduced during fiscal 2015 and will use single-serve pods to dispense cold beverages, including carbonated drinks, enhanced waters, juice beverages, sports drinks and teas.