As at 18 August 2011, Mitsui has acquired approximately 148m shares of Portek, representing 97.04% of the company's equity.
The Japanese firm will purchase the remaining shares at the offer price of S$1.40 per share, beating a previous offer of S$1.20 per share by Philippine-based ICTSI.
Portek, which gained listing in Singapore in 2002, operates and manages seven terminals in Indonesia, Algeria, Gabon, and Malta.