The shipowner sold 6.19m convertible preferred shares to Market Vantage of Hong Kong for KRW 60bn, following a deal three months earlier to sell 6.81m shares for KRW 57bn.
HMM had said in June it would sell KRW 114bn-worth of shares to the group.
The preferred stock can be converted after a year.
The company has been selling off assets and investments to meet debt payments.
It