Also

* Liberty Media Corp.’s UnitedGlobalCom Inc. unit said it would offer $932.2 million in stock for the 33.5% stake that it didn’t already own in UGC Europe Inc., a cable TV operator in 11 countries.

* Silicon Graphics Inc. said its first-quarter sales totaled $215 million to $220 million, beating an estimate of $200 million to $210 million.

* Restoration Hardware Inc. named Patricia McKay chief financial officer, succeeding Kevin Shahan. Shahan was appointed vice president of financial planning and analysis. McKay had been senior vice president of finance at AutoNation Inc.

* Former Northrop Grumman Corp. Chairman Kent Kresa has been elected to the board of directors for General Motors Corp., the automaker said.

* El Paso Corp., the largest U.S. pipeline company, said the Securities and Exchange Commission was investigating its accounting treatment of some power contracts with a New Jersey energy company.