Zhongtai Securities (SHA:600918) posted first-half attributable net profit of 1.75 billion yuan, up 146% from 711.3 million yuan the previous year.
Earnings per share rose to 0.21 yuan from 0.09 yuan, according to weekend filings with the Shenzhen bourse.
Operating revenue rose 46% year over year to 7.54 billion yuan from 5.26 billion yuan.
Shares of the company declined 1% in recent trade.