Bermuda-headquartered tanker owner and operator Ardmore Shipping Corporation has taken delivery of the fourth and fifth of the six Eco tankers acquired this June.

The two vessels, the Ardmore Engineer and the Ardmore Encounter, joined the company's fleet on Sept. 12 and 29, respectively. The final ship is expected to be delivered in early November, according to Ardmore Shipping.

The first three tankers, the Ardmore Endurance, the Ardmore Explorer and the Ardmore Engineer, were added to the company's fleet in September 2016.

All six vessels are 49,500dwt Eco-Design MR product/chemical tankers built by South Korea's STX Offshore and Shipbuilding.

In addition, Ardmore Shipping said it sold the 29,000dwt product/chemical tanker, the Ardmore Centurion, for US$15.7m. The ship was delivered to its owner, Nigeria-based Prudent Energy & Service, on Oct. 4, 2016.