Attached files

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8-K - FORM 8-K - REPLIGEN CORPd358927d8k.htm
EX-10.1 - 2012 STOCK OPTION AND INCENTIVE PLAN - REPLIGEN CORPd358927dex101.htm

Exhibit 3.1

AMENDMENT NO. 2 TO THE

AMENDED AND RESTATED BY-LAWS

OF

REPLIGEN CORPORATION.

Adopted May 24, 2012

The first sentence of Article I, Section 3 of the Amended and Restated By-Laws is hereby amended and restated to read as follows:

“Special meetings of the stockholders may be called at any time by the President, the Chairman or the Board of Directors; and shall be called by the Secretary or any officer upon the written request of one or more stockholders holding, in the aggregate, at least 30% of the outstanding shares of stock of the corporation entitled to vote at such meeting.”