The rise in corporate announcements follows the introduction of a statutory regime for inside information in Hong Kong this year, amid greater scrutiny globally of potential insider trading.
The 10-year ban by the Securities and Futures Commission follows similar actions last year against a duo involved in the same insider-trading activity.
To date no prison sentences have been imposed despite a crackdown by the CSRC which is striving to repair the tainted image of the country's asset-management industry.
Moves by the State Council to collaborate with other government agencies to formalise rules governing non-public information are seen as a step in the right direction.
Hong Kong's regulator, in its first ever such move, is looking to prohibit the US asset manager from dealing in all listed securities and derivatives following further insider-trading allegations.