Bishop Graphics reported that three Los Angeles-area investors last week bought the $270,000 shares of stock owned by the company's former chairman, Martin J. Salvin.
Richard Drysdale, Bishop's president and chief executive, declined to name the investors, who under federal securities law have until next week to disclose their purchase to Securities and Exchange Commission. Bishop, based in Westlake Village, makes supplies for printed circuit boards.
The 270,000 shares of stock make up 11.5% of Bishop's outstanding shares.
Salvin, chairman and president since the company went public in 1969, resigned as chief executive in July after he was asked to relinquish the post by the board.