The brewer also revealed a 19% increase in turnover for the period to £359.9m.
Turnover in its brewing, sales and distribution division rose by 13% to £43.7m and trading profit increased by 18% to £9.9m.
Its own-brewed volume increased 8% during the period, with Greene King IPA up 7% and Old Speckled Hen up 10%.
Greene King added that the integration of Belhaven, which it acquired in October this year, was running to plan.
Rooney Anand, chief executive of Greene King said: “Trading in our divisions remains in line with our expectations and there will be a full contribution from Belhaven in the second half. As a result we remain confident of achieving a successful outcome for the year as a whole.”
“We believe that the inherent strength of our business, in particular the quality of our people, our brands and our pub estate, combined with a proven strategy, will create further opportunities for profitable growth in the future,” he added.