The chief executive officer of PRA Health Sciences Inc. sold 400,000 shares of company stock on Monday, profiting $27.6 million, according to a filing Wednesday with the Securities and Exchange Commission.

Colin Shannon sold the shares at an average price of $74.85, according to the filing. That resulted in proceeds of $29.9 million.

Last week, Shannon had exercised his option to purchase 267,579 shares of at a price of $2.94 per share, spending $786,682. He also exercised his option to purchase 132,421 shares at an average price of $11.73 per share, spending $1.5 million, according to another filing.

Those are the shares that he sold on Monday.

The company’s shares closed Wednesday at $75.16, down 54 cents.

Shannon has been the chief executive officer at the Raleigh-based health care company since Jan. 1, 2010, and has been its president since May 2007. Shannon also served as chief operating officer of PRA International.

He received $5.2 million in total compensation in 2016, up from $977,000 in 2015.

Earlier this month, PRA Health signed an agreement to acquire Symphony Health Solutions Corp. for $530 million in cash, expanding its business in health care data, analytics and consulting.