UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549





FORM 10-K/A

Amendment No. 1







|x | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ------------------------------------------------------------------------------------

For the fiscal year ended December 31, 2007

OR



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

For the transition period from  to

Commission file number 001-33211





NewStar Financial, Inc.

(Exact name of registrant as specified in its
charter)







|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|Delaware                                                       |  | 54-2157878                          
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)



|                                            |  |           
|------------------------------------------- |  | ----------
|500 Boylston Street, Suite 1600, Boston, MA |  | 02116     
|(Address of principal executive offices)    |  | (Zip Code)

Registrants telephone number, including area code: (617) 848-2500

Securities registered pursuant to Section 12(b) of the Act:



|                                        |  |                                          
|--------------------------------------- |  | -----------------------------------------
|Title of each class                     |  | Name of each exchange on which registered
|Common Stock, par value $0.01 per share |  | The NASDAQ Global Market                 

Securities registered pursuant to Section 12(g) of the Act:

None





Indicate by check mark if the
registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes   ̈    No  x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.
Yes   ̈     No  x

Indicate by
check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to
file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No   ̈

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not
be contained, to the best of the registrants knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.   ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller
reporting company. See the definitions of accelerated filer, large accelerated filer and smaller reporting company in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer   ̈    Accelerated Filer   x    Non-Accelerated Filer   ̈    Smaller reporting company   ̈

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  ̈
No x

As of June 29, 2007 the last business day of our most recently completed second fiscal
quarter, the aggregate market value of the voting stock held by non-affiliates was $515,829,574, based on the number of shares held by non-affiliates of the registrant as of June 30, 2007, and based on the reported last sale price of common
stock on June 29, 2007. This calculation does not reflect a determination that persons are affiliates for any other purposes.

As of
March 7, 2008, 48,593,090 shares of common stock, par value of $0.01 per share, were outstanding.

DOCUMENTS INCORPORATED BY
REFERENCE

Portions of the Registrants Definitive Proxy Statement to be filed with the Securities and Exchange Commission
(SEC) pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended (the Exchange Act), relating to the Registrants Annual General Meeting of Members scheduled to be held May 14, 2008 are
incorporated by reference into Part III of this Form 10-K. With the exception of the portions of the Proxy Statement specifically incorporated herein by reference, the Proxy Statement is not deemed to be filed as part of this Form 10-K.







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EXPLANATORY NOTE

This amendment is being filed to amend our Annual Report on Form 10-K for the fiscal year ended December 31, 2007, which we filed with the SEC on March 10, 2008 (the Form 10-K). The sole purpose
of this amendment is to include a revised consent of KPMG LLP, our independent registered public accounting firm, to replace the consent that was filed as Exhibit 23 to our Form 10-K, which inadvertently omitted certain information that should have
been included.

We are also filing certifications by our principal executive officer and principal financial officer required by this
amendment as exhibits Exhibit 31(a)(1) and 31(b)(1) in accordance with Rule 12b-15 of the Securities Exchange Act of 1934, as amended.

Pursuant to Rule 12b-15 of the Securities Act of 1934, as amended, Exhibit 23 of our Annual Report on the Form 10-K is deleted in its entirety and replaced with the attached Exhibit 23. This amendment does not reflect events occurring after
the original filing date of the Form 10-K, or modify or update in any way disclosures made in the Form 10-K. Accordingly, this Form 10-K/A should be read in conjunction with our SEC filings made subsequent to the filing of our Form 10-K.



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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Company has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.



|                  |  |                         |  |                        
|----------------- |  | ----------------------- |  | -----------------------
|                  |  | NEWSTAR FINANCIAL, INC.
|                  |  |                        
|Date: May 7, 2008 |  | By:                     |  | /s/ John K. Bray       
|                  |  |                         |  | John K. Bray           
|                  |  |                         |  | Chief Financial Officer



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INDEX TO EXHIBITS

to Amendment No. 1 to the Annual Report on Form 10-K/A for the Year Ended December 31, 2007



|              |  |                                                                                                     |  |                 
|------------- |  | --------------------------------------------------------------------------------------------------- |  | ----------------
|EXHIBITNUMBER |  | DESCRIPTION                                                                                         |  | METHOD OF FILING
|23            |  | Consent of KPMG LLP.                                                                                |  | Filed herewith. 
|              |  |                                                                                                    
|31(a)(1)      |  | Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |  | Filed herewith. 
|              |  |                                                                                                    
|31(b)(1)      |  | Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |  | Filed herewith.