-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, CogXSdbVlVcxB+rVSSDC7ncCWIzHqUj6z2UdRb4mKWZv63Lo0BspVDnUqKz+tJ3w KzUa0NQO8AKFh7E8Vk1urg== 0001193125-07-053259.txt : 20070713 0001193125-07-053259.hdr.sgml : 20070713 20070313135058 ACCESSION NUMBER: 0001193125-07-053259 CONFORMED SUBMISSION TYPE: CORRESP PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20070313 FILER: COMPANY DATA: COMPANY CONFORMED NAME: REPLIGEN CORP CENTRAL INDEX KEY: 0000730272 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] IRS NUMBER: 042729386 STATE OF INCORPORATION: DE FISCAL YEAR END: 0331 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 41 SEYON STREET STREET 2: BUILDING 1, SUITE 100 CITY: WALTHAM STATE: MA ZIP: 02453 BUSINESS PHONE: 7814499560 MAIL ADDRESS: STREET 1: 41 SEYON STREET STREET 2: BUILDING 1, SUITE 100 CITY: WALTHAM STATE: MA ZIP: 02453 CORRESP 1 filename1.htm SEC RESPONSE LETTER

RepliGen

Repligen Corporation

41 Seyon Street, Bldg #1

Waltham, MA 02453-8335

Telephone: 781-250-0111

Telefax : 781-250-0115

 

                March 13, 2007

United States Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N.E.

Washington, D.C. 20549-7010

Attention: Jim B. Rosenberg / Mark Brunhofer

 

Re: Repligen Corporation
     Form 10-K for Fiscal Year Ended March 31, 2006 : File No. 0-14656

Dear Gentlemen:

This letter is being furnished on behalf of Repligen Corporation (the “Company”) in response to comments in the letter dated March 5, 2007 (the “Letter”) from Jim B. Rosenberg of the Staff (the “Staff”) of the Securities and Exchange Commission (the “Commission”) to Walter C. Herlihy, President and Chief Executive Officer of the Company, with respect to the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2006 (the “Form 10-K”) that was filed with the Commission on June 9, 2006.

We respectfully request an extension of time until April 5, 2007 to provide our response. This will provide the time needed to fully and adequately prepare and review the response with all applicable parties. Thank you for your consideration in this matter.

If you require additional information, please telephone the undersigned at (781) 419-1850.

Sincerely,

/s/ Daniel W. Muehl

Daniel W. Muehl

Chief Financial Officer

Repligen Corporation

-----END PRIVACY-ENHANCED MESSAGE-----