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 June 30, 2012

OR



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

Commission file number: 001-34628





QuinStreet,
Inc.

(Exact name of registrant as specified in its charter)







|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|Delaware                                                       |  | 77-0512121                          
|(State or other jurisdiction of
incorporation or organization) |  | (I.R.S. Employer Identification No.)

950 Tower Lane, 6thFloor

Foster City, California 94404

(Address of principal executive offices,
including zip code)

(650) 587-7700

(Registrants telephone number, including area code)

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 $0.001 per share |  | The NASDAQ Stock Market LLC (NASDAQ Global Select 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 whether the registrant has submitted electronically and posted on its corporate Web site, if any, every
Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).    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 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.  x

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 large accelerated filer, accelerated filer and smaller reporting company in Rule 12b-2 of the Exchange Act.
(Check one):



|                        |  |                                                  |  |                           |  |  
|----------------------- |  | ------------------------------------------------ |  | ------------------------- |  | -
|Large accelerated filer |  |  ̈                                                |  | Accelerated filer         |  | x
|                        |  |                                                  | 
|Non-accelerated filer   |  |  ̈  (Do not check if a smaller reporting company) |  | 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 December 31, 2011, the aggregate market value of the voting stock held by non-affiliates of the registrant, based on the
closing sale price of the Companys common stock as reported by the NASDAQ Global Select Market on such date, was $270,210,124. For purposes of this disclosure, shares held by persons who hold more than 5% of the outstanding shares of common
stock and shares held by executive officers and directors of the registrant have been excluded because such persons may be deemed to be affiliates. This determination of executive officer or affiliate status is not a conclusive determination for
other purposes.

Number of shares of common stock outstanding as of January 31, 2013: 42,795,215

Documents Incorporated by Reference:

Portions of the registrants definitive proxy statement relating to its 2012 annual stockholders meeting are incorporated by reference into Part III of this Annual Report on Form 10-K
where indicated.









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EXPLANATORY NOTE

QuinStreet, Inc. is filing this Amendment No. 1 on Form 10-K/A (the Form 10-K/A or the Amendment) to its
Annual Report on Form 10-K for the fiscal year ended June 30, 2012 as filed with the Securities and Exchange Commission (the SEC) on August 23, 2012 (the Original Filing) solely to correct an administrative error in
the content of Exhibit 23.1, Consent of Independent Registered Public Accounting Firm (the Consent). The Consent in the Original Filing incorrectly identified the date of PricewaterhouseCoopers audit report as August 22, 2012.
The correct date of the audit report included in the Original Filing is August 23, 2012. A new consent with the correct date is filed as an exhibit attached hereto.

Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the Exchange Act), this Form 10-K/A also contains new certifications pursuant to Section 302 of the
Sarbanes-Oxley Act of 2002, which are attached hereto. Because no financial statements have been included in this Form 10-K/A and this Form 10-K/A does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K under the
Exchange Act, paragraphs 3, 4, and 5 of the certifications have been omitted. Pursuant to Rule 13a-14 of the Exchange Act, this Form 10-K/A also contains new certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, which are
attached hereto.



|            |  |                                                                                                                    
|----------- |  | -------------------------------------------------------------------------------------------------------------------
|Exhibit
No. |  | Description of Exhibit                                                                                             
|            | 
|23.1*       |  | Consent of Independent Registered Public Accounting Firm.                                                          
|            | 
|31.1*       |  | Certification of the Chief Executive Officer of QuinStreet, Inc. pursuant to Section 302 of the Sarbanes-Oxley Act.
|            | 
|31.2*       |  | Certification of the Chief Financial Officer of QuinStreet, Inc. pursuant to Section 302 of the Sarbanes-Oxley Act.
|            | 
|32.1**      |  | Section 1350 Certifications of Chief Executive Officer and Chief Financial Officer.                                



|* | Filed herewith.
|- | ---------------

|** | Furnished herewith.
|-- | -------------------

Except as
described above, no other changes have been made to the Original Filing and this Form 10-K/A does not amend, update, or change the financial statements or any other items or disclosures in the Original Filing.

This Amendment does not update any disclosures to reflect developments since the filing date of the Original Filing.



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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized, on February 19, 2013.



QuinStreet, Inc.By:

/s/  Douglas ValentiDouglas ValentiChairman and Chief Executive Officer




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EXHIBIT INDEX



|            |  |                                                                                                                    
|----------- |  | -------------------------------------------------------------------------------------------------------------------
|Exhibit
No. |  | Description of Exhibit                                                                                             
|            | 
|23.1*       |  | Consent of Independent Registered Public Accounting Firm.                                                          
|            | 
|31.1*       |  | Certification of the Chief Executive Officer of QuinStreet, Inc. pursuant to Section 302 of the Sarbanes-Oxley Act.
|            | 
|31.2*       |  | Certification of the Chief Financial Officer of QuinStreet, Inc. pursuant to Section 302 of the Sarbanes-Oxley Act.
|            | 
|32.1**      |  | Section 1350 Certifications of Chief Executive Officer and Chief Financial Officer.                                



|* | Filed herewith.
|- | ---------------

|** | Furnished herewith.
|-- | -------------------



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