BDM International Inc, McLean, Virginia is trying to muscle in and break up the party between Amdahl Corp and its Canadian target DMR Group Inc, Montreal. BDM is offering $6.64 a class B share of DMR, topping Amdahl’s $6.09 per share bid. Under DMR’s shareholder provisions, class A shareholders can convert their shares to class B if an offer is made for the class B shares, and while three major shareholders have irrevocably accepted, they hold 99% of the class B stock, but only 15% of the class A.