The surge has been reported for the first quarter of 2015, and the group says this is in line with its annual production guidance.
(READ MORE: Harmony Gold production for FY stable)
Chief executive officer of [DATA HAR:Harmony Gold Mining Company Limited], Graham Briggs said the group was strengthening its margins.
“Harmony is strengthening its margins through increasing its gold production," said Briggs through a SENS statement.
"We continued to increase our underground grade, with a 4% rise quarter on quarter," he added.
(READ MORE: S.Africa's Harmony Gold quarterly loss widens, reports increased HEPS)
The group is set to announce its first quarter FY15 ended 30 September 2014 on 5 November 2014.