(ENTA)—The existence of a 10b5-1 plan in itself means the stock grants are nothing more than an income stream to him.
The exercise-and-hold transactions, which are mathematically equivalent to open-market purchases,* directly contradict your statement above.
*When the shareholder pays the income tax triggered by the exercise with cash rather than a forfeiture of shares, which was the case in the transactions discussed in this thread.