Siebel Systems ( SEBL) Wednesday preannounced stronger-than-expected fourth-quarter revenue. The San Mateo, Calif.-based software company said it expects revenue of approximately $387 million to $390 million. The consensus estimate is for $347.2 million, according to Thomson First Call. Siebel also expects license revenue for the quarter to be approximately $159 million to $161 million. Operating margin for the fourth quarter of 2004 is expected to be 15% to 16% of total revenue, a 90% increase over the third quarter of 2004. Siebel reports full earnings on Jan. 27, when it will also provide first-quarter guidance. Shares rose 31 cents, or 3.1%, to $10.19.