In July 1997, Tyco merged by reverse takeover with a smaller publicly traded security services company named ADT Limited, controlled by Michael Ashcroft. As part of the deal, Tyco International Ltd. of Massachusetts became a wholly owned subsidiary of ADT Limited, and simultaneously ADT changed its name to Tyco International Ltd., retaining the former Tyco stock symbol, TYC. The merger moved Tyco's incorporation to Bermuda, a tax haven, where it was headquartered in the colonial capital of Hamilton. A new subsidiary named ADT Security Systems was also formed out of the merger, and later changed its name to ADT Security Services.