This is how it should work...
Let's say the share price is at 9.50 when exercised....
Value = 500,000 x 9.5 = 4,750,000
Cost = 500,000 x 1.6 = 800,000
Ordinary Gain = 3,950,000
Tax on Gain (Fed, NY State and NY City) will be appx 44% (30,10,4)
3,950,000 x 44% = 1,738,000
Therefore, at 9.50 per share...267,158 shares will be sold atto cover Cost and Ordinary Gain.
When Form 4 is filed, Missling will receive appx. 232,842 shares.
I believe this is how it will go down.