UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549





FORM 10-Q







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

For the quarterly period ended September 30, 2012

or



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

For transition period
from                to

Commission File
Number 333-181995





NORTHFIELD BANCORP, INC.

(Exact name of registrant as specified in its charter)







|                                               |  |                                     
|---------------------------------------------- |  | ------------------------------------
|Delaware                                       |  | Being Applied For                   
|(State or other jurisdiction of incorporation) |  | (I.R.S. Employer Identification No.)



|                                         |  |           
|---------------------------------------- |  | ----------
|581 Main Street, Woodbridge, New Jersey  |  | 07095     
|(Address of principal executive offices) |  | (Zip Code)

Registrants telephone number, including area code: (732) 499-7200

Not Applicable

(Former name, former address, and former fiscal year, if changed since last report)





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.     (1) Yes  þ    No   ̈.     (2) Yes   ̈    No  þ.

Indicate by check mark whether the registrant has submitted electronically and posted on it 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 shorter period that the registrant was required and post such files).     Yes   ̈    No   ̈.

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 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         |  |  ̈
|                        |  |                                                | 
|Non-accelerated filer   |  | x  (Do not check if 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  þ.

Indicate the number of shares outstanding of each of the issuers classes of common stock as of the latest practicable date. As of December 21, 2012, zero shares of Common Stock, par value $0.01
per share.









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EXPLANATORY NOTE

Northfield Bancorp, Inc., a Delaware corporation (the Company), was formed to serve as the stock holding company for Northfield Bank as part of the mutual-to-stock conversion of Northfield
Bancorp, MHC. The Company is offering shares of common stock for sale in connection with the conversion of Northfield Bancorp, MHC from the mutual holding company to the stock holding company form of organization. The shares we are offering
represent the ownership interest in Northfield Bancorp, Inc., a federal corporation, currently owned by Northfield Bancorp, MHC. As of September 30, 2012, the conversion had not been completed, and, as of that date, the Company had no
assets or liabilities, and had not conducted any business other than that of an organizational nature. For informational purposes, please see the Quarterly Report for the quarter ended September 30, 2012 of Northfield Bancorp, Inc., a federal
corporation and the current stock holding company for the Bank, which has previously been filed with the U.S. Securities and Exchange Commission.



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PART I  FINANCIAL INFORMATION



|ITEM 1. | FINANCIAL STATEMENTS
|------- | --------------------

Please see the Explanatory Note.



|ITEM 2. | MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
|------- | -------------------------------------------------------------------------------------

Please see the Explanatory Note.



|ITEM 3. | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
|------- | ----------------------------------------------------------

Please see the Explanatory Note.



|ITEM 4. | CONTROLS AND PROCEDURES
|------- | -----------------------

Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we
evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of the end of the period covered by this
report. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that, as of the end of the period covered by this report, our disclosure controls and procedures were effective.

During the quarter ended September 30, 2012, there were no changes in the Companys internal control over financial reporting
that have materially affected, or are reasonably likely to materially affect, the Companys internal control over financial reporting.

Please see the Explanatory Note.

PART II  OTHER INFORMATION



|ITEM 1. | LEGAL PROCEEDINGS
|------- | -----------------

Please
see the Explanatory Note.



|ITEM 1A. | RISK FACTORS
|-------- | ------------

There have
been no material changes in the Risk Factors disclosed in the Companys Registration Statement on Form S-1 (Commission File No. 333-181995).



|ITEM 2. | UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS
|------- | -----------------------------------------------------------

Please see the Explanatory Note.



|ITEM 3. | DEFAULTS UPON SENIOR SECURITIES
|------- | -------------------------------

Please see the Explanatory Note.



|ITEM 4. | MINE SAFETY DISCLOSURES
|------- | -----------------------

Not applicable.



|ITEM 5. | OTHER INFORMATION
|------- | -----------------

None



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|ITEM 6. | EXHIBITS
|------- | --------



|             |  |                                                                                                                                                                                                                                                                         
|------------ |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit 31.1 |  | Certification of John W. Alexander, Chairman, President and Chief Executive Officer, Pursuant to Rule 13a-14(a) and Rule 15d-14(a).                                                                                                                                     
|             | 
|Exhibit 31.2 |  | Certification of Steven M. Klein, Chief Operating Officer and Chief Financial Officer, Pursuant to Rule 13a-14(a) and Rule 15d-14(a).                                                                                                                                   
|             | 
|Exhibit 32   |  | Certification of John W. Alexander, Chairman, President and Chief Executive Officer, and Steven M. Klein, Chief Operating Officer and Chief Financial Officer, Pursuant to 18 U.S.C.
Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.



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SIGNATURES

Pursuant to the requirements 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.



|                        |  |  |  |                                                    
|----------------------- |  |  |  | ---------------------------------------------------
|                        |  |  |  | NORTHFIELD BANCORP, INC. (Registrant)              
|                        |  | 
|Date: December 21, 2012 |  |  |  | /s/ John W. Alexander                              
|                        |  |  |  | John W. Alexander                                  
|                        |  |  |  | Chairman, President and Chief Executive Officer    
|                        |  | 
|Date: December 21, 2012 |  |  |  | /s/ Steven M. Klein                                
|                        |  |  |  | Steven M. Klein                                    
|                        |  |  |  | Chief Operating Officer and Chief Financial Officer
|                        |  |  |  | (Principal Financial Officer)