American Tungsten & Antimony (ASX:AT4) confirmed that the execution of a share sale and purchase agreement with Nexus Metals to acquire the Del Sol refinery in Nevada and the White Spar antimony mine in Arizona, US, is information that is expected to have a material effect on the price or value of its securities, according to a response filed with the Australian bourse Aug. 7 after market hours.

In its response to the ASX aware query, the company said it requested a trading halt to prevent its securities from trading on an uninformed basis before the disclosure of the deal on July 28.

The company first became aware of the information on July 27, when the agreement was executed by all parties, the filing said.