Calls to Koenigsegg's headquarters in Angelholm, southern Sweden, were not answered Thursday. Saab officials didn't immediately return calls seeking comment. Gunilla Gustavs, a spokeswoman at Saab Automobile in Sweden, declined to comment on the speculation, saying Saab will make an official statement when the sales process has been finalized. "I have no information on the timeline of that," she said, but added that "yes, we believe we're in the final stages." Saab went into creditor protection Feb. 20 in an effort by GM to spin off or sell the unit. Saab confirmed last month that three bidders remained in the sales process and that they expected to complete the sale by the end of June. The three bidders reportedly in the lead to buy Saab were Koenigsegg; The Renco Group, a private equity firm; and Merbanco, a Wyoming-based group of investors.