June 4 (Reuters) - Australia's Treasury Wine Estates said on Thursday that it was reviewing its Americas operations to improve returns and long-term shareholder value, sending its shares up more than 12% in early trade.

Shares of the company rose as much as 12.6% to A$4.640, heading for their best session since April 22 and hitting their highest level since May 25.

(Reporting by Rajasik Mukherjee; Editing by Subhranshu Sahu)