A substantial insider activity was disclosed on October 15, as JR, Director at Carpenter Tech (NYSE:CRS), reported the exercise of a large sell of company stock options. What Happened: A Form 4 filing with the U.S. Securities and Exchange Commission on Tuesday revealed that JR, Director at Carpenter Tech in the Materials sector, exercised stock options for 2,445 shares of CRS stock. The exercise price of the options was $42.81 per share. The latest update on Wednesday morning shows Carpenter Tech shares up by 1.61%, trading at $158.69. At this price, JR’s 2,445 shares are worth $283,326. Delvi…