An investment group including Trans World Airlines...

An investment group including Trans World Airlines and its chairman, Carl C. Icahn, said it has raised its stake in Ozark Holdings, parent company of Ozark Airlines, to 16.62% of the firm’s outstanding shares . . . Ex-Cell-O will buy the compressor components division of Cleveland-based TRW for a price to be determined within two months, the companies reported . . . Software Publishing announced its decision to remove copy protection from all future software programs and any new releases of current software programs . . . System Integrators of Sacramento said it will increase its current 450-person work force by 25% within six months . . . American Express announced that it has completed the previously announced repurchase of 10 million common shares at an average price of $56.96 per share . . . China’s industrial growth slowed to a moderate 4.4% in the first quarter of 1986, Chinese officials report.