GOLDMAN SACHS & CO. MORGAN STANLEY & CO. INCORPORATED 85 Broad Street 1585 Broadway New York, NY 10004 New York, NY 10036 Via EDGAR and Facsimile - ----------------------- December 11, 2006 Securities and Exchange Commission Division of Corporate Finance 100 F Street, N.E. Washington, DC 20549 Re: NewStar Financial, Inc. Registration Statement on Form S-1 (Reg. No. 333-137513) Request for Acceleration Ladies and Gentlemen: Pursuant to Rule 461 under the Securities Act of 1933, as amended (the "Securities Act"), the undersigned, acting on behalf of themselves and as the representative of the several Underwriters, hereby join in the request of NewStar Financial, Inc. that the effective date of the above referenced Registration Statement be accelerated so that the Registration Statement may become effective by 2:00 pm Eastern Standard Time on December 13, 2006, or as soon thereafter as practicable. In connection with this acceleration request and pursuant to Rule 460 under the Securities Act, the following information is provided with respect to the distribution between November 30, 2006 and the date hereof of the preliminary prospectus dated November 30, 2006: To Whom Distributed Number of Copies ------------------- ---------------- Prospective underwriters, dealers and others 26,854 Institutions 2,493 Total 29,347 We have been informed by the participating underwriters that they will comply with the requirements of Rule 15c2-8 under the Securities Exchange Act of 1934. Sincerely, GOLDMAN, SACHS & CO. MORGAN STANLEY & CO. INCORPORATED Acting on behalf of themselves and as the Representative of the several Underwriters By: GOLDMAN, SACHS & CO. By: /s/ Goldman, Sachs & Co. ------------------------------------- (Goldman, Sachs & Co.) By: MORGAN STANLEY & CO. INCORPORATED By: /s/ John Tyree ------------------------------------- Name: John Tyree Title: Executive Director