Oracle ( ORCL) on Monday extended its 13-month-old offer for rival PeopleSoft ( PSFT) yet again, telling shareholders they have until Aug. 27, midnight EDT, to tender their shares. The extension is essentially a formality; Oracle will make little effort to win shareholder approval for its $7.7 billion, or $21-a-share, hostile offer until a U.S. District Court judge decides an antitrust suit against the company. Judge Vaughn Walker's verdict is expected in August or September. To date, only 4.7 million of PeopleSoft's 5.2 billion shares outstanding have been offered, and not returned. PeopleSoft ended the trading day Monday with a gain of 13 cents, less than 1%, to $17.18; Oracle gained 6 cents to close at $11.09.