In early March, when merger talks were under way between Towers Watson TW, -0.76% and insurance broker Willis Group Holdings PLC WSH, -1.82% , Haley exercised 106,933 stock options and sold the underlying shares for a $9.7 million profit, according to regulatory filings.
Utilize the input text as a context reference, choose the right relationship between 'Willis Group' and 'insurance broker' from the options.
Options: industry, publisher, developer, position held