EXHIBIT 4.3 SECOND AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT This Second Amended and Restated Investors' Rights Agreement (this "Agreement") dated as of February 27, 2004 (this "Agreement") is made by and among Momenta Pharmaceuticals, Inc., a...Investors' Rights Agreement • June 15th, 2004 • Momenta Pharmaceuticals Inc • Biological products, (no disgnostic substances) • Massachusetts
Contract Type FiledJune 15th, 2004 Company Industry Jurisdiction
Shares Common StockUnderwriting Agreement • June 15th, 2004 • Momenta Pharmaceuticals Inc • Biological products, (no disgnostic substances) • New York
Contract Type FiledJune 15th, 2004 Company Industry Jurisdiction