Western Pacific accepted a $360-million buyout.

An investment group led by Gibbons, Green, van Amerongen, a privately held investment firm, offered $155 cash for each of Western Pacific’s 2.3 million common shares outstanding. After the announcement, the firm’s stock soared $24.25 to $158.50 a share on the NYSE, indicating the group might have to raise its bid to complete the deal. Western Pacific, the parent of Western Pacific Railroad until 1979, manufactures electromechanical counting devices, precision parts and industrial thermoplastics.