UNICORP VOTING STAKE HIKED IN UNION ENTERPRISES <Union Enterprises Ltd> said holders of 7.2 mln or 80 pct of its class A series one preferred shares requested to retract their shares under terms of the issue, thus raising <Unicorp Canada Corp>'s voting stake in Union to 58 pct from 50. Union said it paid about 90 mln dlrs on April 1 for the retraction, using existing credit lines.