ON stock is down after the bell. See the chart and price action here. Deal DetailsON Semi will acquire Synaptics in an all-stock transaction, representing a total enterprise value of approximately $7 billion. The transaction value reflects a fixed exchange ratio of 1.350 shares of ON Semi common stock for each Synaptics share and represents an approximately 19% premium to the volume-weighted average closing prices of ON Semi and Synaptics over the past 10 trading days.The companies stated the combination wo ...