Enviro Energy International Holdings (HKG:1102), or EEIHL, said that Amethyst Asia has completed its mandatory unconditional cash offer for EEIHL on March 25 without revision or extension, according to a filing with the Hong Kong bourse on Tuesday.

The Amethyst Asia and its concert parties increased their stake to 50.81% from 47.28% of EEIHL's issued share capital.

Despite the acquisition, 39.84% of shares remain publicly held, ensuring compliance with Hong Kong's listing rules.