Coupang (CPNG) reported a Q2 adjusted loss late Tuesday of $0.09 per diluted share, swinging from earnings of $0.02 a year earlier.
Revenue in the three months ended June 30 rose to $8.86 billion from $8.52 billion a year earlier.
Analysts surveyed by FactSet expected $8.92 billion.
The company's shares fell 4.2% in after-hours trading.