An investor group may boost its stake in Fairchild.

The group, led by New York investor George Soros, said it was considering boosting its stake in Fairchild Industries Inc. to as much as 49.9% of the aerospace and aviation company’s outstanding stock. The group, which said it was dissatisfied with Fairchild’s management, already controls 1.65 million Fairchild shares, or 11.5% of the total outstanding. The group said it filed with federal antitrust regulators for clearance to buy enough additional shares to increase its total stake to up to 49.9%.