On January 25, 2012, Ronald L. Chez sent a letter to Walter Herlihy, Chief Executive Officer and to Karen Dawes, Co-Chairperson of the Board of the Repligen Corporation. In the letter, Ronal said that he would like to request a meeting with the entire Board at the earliest possible time on important concerns that need to be dealt with now. Ronald also viewed that it is imperative to better align the interests of the Board and senior management with the owners of the Company. Further, Ronald would like to have one of the bankers join him to meet with the Board to consider a full range of actions on behalf of long term, unrewarded investors.