The owner said it would dispose of 234m restricted shares from13 December.
The stock represents a 2% stake in the company.
At the current price of CNY 2.64 per share in Shanghai, thedeal would bring in about CNY 618m ($101.7m).
The China Shipping Group company has been selling off stakesin its terminals in recent weeks after posting a third quarter loss of CNY 404m,against a profit of CNY 991m a year earlier.
