0000950123-11-034608 Sample Contracts

IDENIX PHARMACEUTICALS, INC. 18,310,000 Shares of Common Stock Underwriting Agreement
Underwriting Agreement • April 11th, 2011 • Idenix Pharmaceuticals Inc • Pharmaceutical preparations • New York

The undersigned understands that you propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) with Idenix Pharmaceuticals, Inc., a Delaware corporation (the “Company”), providing for the public offering (the “Public Offering”) by J.P. Morgan Securities LLC (the “Underwriter”), of common stock, $0.001 par value, of the Company (the “Securities”). Capitalized terms used herein and not otherwise defined shall have the meanings set forth in the Underwriting Agreement.

CONCURRENT PRIVATE PLACEMENT STOCK PURCHASE AGREEMENT by and between NOVARTIS PHARMA AG and IDENIX PHARMACEUTICALS, INC.
Stock Purchase Agreement • April 11th, 2011 • Idenix Pharmaceuticals Inc • Pharmaceutical preparations • Delaware

This Concurrent Private Placement Stock Purchase Agreement (this “Agreement”) is made as of the 8th day of April, 2011, by and between Idenix Pharmaceuticals, Inc., a Delaware corporation (the “Company”), and Novartis Pharma AG (the “Investor”).