The miner, which is now the sole owner of its operations after being sold Platinum Group Metals' Maseve plant last year for around $74 million, said last month that it expected its loss to widen by as much as 75 cents per share.
"Styldrift’s ramp-up progressed steadily, albeit at lower-than-planned production levels," the firm said.
It said improvements to Styldrift's ramp-up to 20,000 tonnes per month had been delayed by challenges including recruiting experienced workers.
The mid-tier producer reported a headline loss per share (HLPS) of 70.4 cents for the six months ended June 30, compared with a loss per share of 6 cents a year earlier.
HEPS is the main profit gauge in South Africa and strips out one-off items.
EBITDA, however, increased to 525.6 million from 222.5 million rand.
The company said production for the full-year is expected at between 430,000 -440,000 ounces.
(Reporting by Onke Ngcuka; editing by Rashmi Aich and Jason Neely)