SAN FRANCISCO, Dec. 26 - The proposed Genomica-Exelixis merger finally got its stock-exchange ratio. The ratio for converting shares of Genomica stock into shares of Exelixis stock will be 0.28306, the companies said on Wednesday .
The initial offering period for the exchange will expire midnight Eastern Standard Time on Dec. 28.
Exelixis announced on Nov. 19 plans to acquire Genomica in a stock deal valued at $110 million, and Genomica's board of directors unanimously recommended that the firm's stockholders accept the offer, according to the company.