Coherent's board of directors considers II-VI's latest merger proposal to be the best option, based on the company's valuation of $6.8 billion, or $272.68 per share. Coherent shareholders could receive $195 and 1 common share of II-VI for each of their securities. Under the prior agreement, Lumentum still has until March 18, 2021 to make a better offer, but does not intend to exercise that right and will await Coherent's final decision.