A substantial insider activity was disclosed on June 27, as M, Principal Accounting Officer at T. Rowe Price Gr (NASDAQ:TROW), reported the exercise of a large sell of company stock options. What Happened: M, Principal Accounting Officer at T. Rowe Price Gr, exercised stock options for 1,401 shares of TROW stock. This information was disclosed in a Form 4 filing with the U.S. Securities and Exchange Commission on Thursday. The exercise price of the options was $69.84 per share. T. Rowe Price Gr shares are trading, exhibiting down of 0.0% and priced at $115.43 during Friday’s morning. This valu…