Thoresen Thai Agencies Public Company Limited (ÂTTAÂ) is a strategic investment holding company with three primary business groups  Transport, Energy, and Infrastructure. TTA and its subsidiaries (the ÂGroupÂ) have provided shipping-related services since 1904, dry-bulk shipping services since 1985, and offshore oil and gas services since 1995. In 2009, the Group added fertilizer production, coal mining, and end-to-end coal logistics in its business portfolio.