 Mobile-games designer Playtika Holding Corp. PLTK, 2.99 plans to lay off about 15 of its workforce, Chief Executive Robert Antokol said in an email to employees that was also filed with the Securities and Exchange Commission. As we assess the current environment and look toward the future, Playtika must return to our roots of excellence through agility, efficiency, creativity and being obsessed with winning to deliver the most fun forms of mobile entertainment to our players, he said in the message. 