Coretek Opto Corporation announced earnings results for the half year ended June 30, 2019. For the half year, the company announced sales was TWD 173.858 million compared to TWD 249.917 million a year ago. Operating loss was TWD 36.104 million compared to TWD 39.556 million a year ago. Net loss was TWD 36.042 million compared to TWD 25.214 million a year ago. Basic loss per share was TWD 0.55 compared to TWD 0.38 a year ago.