Less than two years after becoming chief executive officer of Arm Holdings Plc, Rene Haas led the British chip designer to the world’s biggest initial public offering of 2023, raising $4.87 billion. Since then, the shares have more than doubled, valuing the Cambridge-based company at nearly $150 billion. Haas aims to put Arm — which designs chips for tech giants like Apple Inc. and Samsung Electronics Co. — at the forefront of artificial intelligence. The battle over intellectual property has tr...