— Shares Rib-X Pharmaceuticals, Inc. Common Stock ($0.001 Par Value) EQUITY UNDERWRITING AGREEMENTEquity Underwriting Agreement • May 2nd, 2012 • Rib-X Pharmaceuticals, Inc. • Pharmaceutical preparations • New York
Rib-X Pharmaceuticals, Inc., a Delaware corporation (the “Company”), proposes to sell to the several underwriters (the “Underwriters”) named on Schedule I hereto for whom you are acting as representative (the “Representative”) an aggregate of — shares (the “Firm Shares”) of the Company’s common stock, $0.001 par value (the “Common Stock”). The respective amounts of the Firm Shares to be so purchased by the several Underwriters are set forth opposite their names on Schedule I hereto. The Company also proposes to sell at the Underwriters’ option an aggregate of up to — additional shares of the Company’s Common Stock (the “Option Shares”) to cover over-allotments in the sale of the Firm Shares as set forth below.
