Peters Co. repairs computers. On February 9, Year 1, Stark Electronics Corp. sold Peters a circuit tester on credit. Peters executed an installment note for the purchase price, a security agreement covering the tester, and a financing statement that Stark filed on February 11, Year 1. On April 13, Year 1, creditors other than Stark filed an involuntary petition in bankruptcy against Peters. What is Stark's status in Peters' bankruptcy?