Exhibit 4.1 THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY APPLICABLE STATE SECURITIES LAWS, AND MAY NOT BE SOLD OR TRANSFERRED UNLESS SUCH SALE OR TRANSFER IS IN ACCORDANCE WITH THE REGISTRATION REQUIREMENTS...Repligen Corp • August 12th, 2003 • Biological products, (no disgnostic substances) • Massachusetts
Company FiledAugust 12th, 2003 Industry Jurisdiction