It was just uploaded to the SEC, via a prospectus-supplement exhibit.
This is a complicated deal. I'll have more, after I digest it:
. . . .Subject to and upon the terms and conditions described in this Agreement, Schering-Plough offers herein to Sanofi-Aventis an option, and Sanofi-Aventis accepts such option (without undertaking to exercise it), to, following the completion of the Merger and the acquisition by Sanofi-Aventis of the Merial Equity Interests pursuant to the Share Purchase Agreement, cause the I/SP Entities, which would, at the Closing, collectively conduct all of the I/SP Business, to be combined with Merial (by way of contribution) upon the terms and conditions described in this Agreement, as a result of which Sanofi-Aventis and Schering-Plough would each, directly or indirectly, hold 50% of the equity interests in such combined company. . . .
And here is the main share purchase agreement, just filed, as well. I'll offer analysis, after I read it -- in the morning -- tomorrow. Done -- see above: