UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549



FORM 10-K/A



ANNUAL REPORT PURSUANT TO SECTION 13 OR
15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934



For the Fiscal Year Ended December 31,
2017



Commission File Number 0-19065



SANDY
SPRING BANCORP, INC.

(Exact name of registrant as specified in
its charter)



|Maryland                                                                       | 52-1532952                                  
|------------------------------------------------------------------------------ | --------------------------------------------
|(State or
        other jurisdiction of
        incorporation or organization) | (I.R.S. Employer
        Identification No.)



|17801 Georgia Avenue, Olney, Maryland    | 20832     
|---------------------------------------- | ----------
|(Address of principal executive offices) | (Zip Code)



301-774-6400

(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 $1.00 per share | The NASDAQ Stock Market, LLC             



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
x No



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
x No*



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.	 x
Yes  ̈ No



Indicate by check mark whether the registrant
has submitted electronically and posted on its corporate Website, 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 to submit and post such files).    x Yes  ̈ 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, a smaller reporting company or an emerging growth
company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting
company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.



Large accelerated
filer x	 Accelerated filer  ̈
Non-accelerated filer  ̈ Smaller reporting company  ̈	Emerging
growth company  ̈





If an emerging growth company, indicate by check mark if the
registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards
provided pursuant to Section 13(a) of the Exchange Act.  ̈



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



The aggregate market value of the voting
common stock of the registrant held by non-affiliates on June 30, 2017, the last day of the registrant’s most recently completed
second fiscal quarter was approximately $949 million, based on the closing sales price of $40.66 per share of the registrant's
Common Stock on that date.



The number of outstanding shares of common
stock outstanding as of February 21, 2018.



Common stock, $1.00 par value –
35,453,721 shares



Documents Incorporated By Reference



Part III: Portions of the definitive proxy
statement for the Annual Meeting of Shareholders to be held on April 25, 2018 (the
"Proxy Statement").





* The registrant is required to file reports pursuant to Section
13 of the Act.




















Explanatory Statement to Form 10-K Amendment



This Amendment No.
1 (this “Amendment”) amends the Annual Report on Form 10-K of Sandy Spring Bancorp, Inc. for the year ended December
31, 2017, filed with the Securities Exchange Commission on March 3, 2017 (the “Original Form 10-K”). The sole purpose
of this Amendment is refile Exhibit 23(a) to correct a typographical error in the identification of the registration statements
referenced therein.



In addition, as required
by Rule 12b-15 under the Securities Act of 1934, as amended, new certifications by our principal executive officer and principal
financial officer are filed as exhibits to this Amendment under Item 15 of Part IV hereof.



This Amendment speaks
as of the filing date of our Original Form 10-K and has not been updated to reflect events occurring subsequent to the original
filing date.



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Item 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES



The following
financial statements are filed as a part of this report:



Consolidated Statements of Condition at
December 31, 2017 and 2016

Consolidated
Statements of Income for the years ended December 31, 2017, 2016 and 2015

Consolidated
Statements of Comprehensive Income for the years ended December 31, 2017, 2016 and 2015

Consolidated
Statements of Cash Flows for the years ended December 31, 2017, 2016 and 2015

Consolidated
Statements of Changes in Stockholders' Equity for the years ended December 31, 2017, 2016 and 2015

Notes to the
Consolidated Financial Statements

Reports of Registered Public Accounting
Firm



All financial statement schedules have
been omitted, as the required information is either not applicable or included in the Consolidated Financial Statements or related
Notes.





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|Exhibit No. | Description                                                                                                                                                                                                                                                                                  
|----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|3(a)        | Articles
    of Incorporation of Sandy Spring Bancorp, Inc., as amended (incorporated by reference to Exhibit 3.1 to Form 10-Q for the
    quarter ended June 30, 1996, SEC File No. 0-19065)                                                                                                
|3(b)        | Articles of Amendment to the Articles of Incorporation of Sandy Spring Bancorp, Inc. (incorporated by reference to Exhibit 3(b) to Form 10-K for the year ended December 31, 2011, SEC File No. 0-19065)                                                                                     
|3(c)        | Bylaws of Sandy Spring Bancorp, Inc. (incorporated by reference to Exhibit 3(c) to Form 10-K for the year ended December 31, 2017, SEC File No. 0-19065)                                                                                                                                     
|4(a)        | No long-term debt instrument issued by the Company exceeds 10% of consolidated assets or is registered.  In accordance with paragraph 4(iii) of Item 601(b) of Regulation S-K, the Company will furnish the SEC copies of all long-term debt instruments and related agreements upon request.
|10(a)*      | Sandy Spring Bancorp, Inc. 2005 Omnibus Stock Plan (incorporated by reference to Exhibit 10.1 to Form 8-K filed on June 27, 2005, SEC File No. 0-19065)                                                                                                                                      
|10(b)*      | Form of Director Fee Deferral Agreement, August 26, 1997, as amended (incorporated by reference to Exhibit 10(h) to Form 10-K for the year ended December 31, 2003, SEC File No. 0-19065)                                                                                                    
|10(c)*      | Form of Amendment to Directors’ Fee Deferral Agreement (incorporated by reference to Exhibit 10(o) to Form 10-K for the year ended December 31, 2008, SEC File No. 0-19065)                                                                                                                  
|10(d)*      | Sandy Spring Bank Directors’ Deferred Fee Plan (incorporated by reference to Exhibit 10(d) to Form 10-K for the year ended December 31, 2016, SEC File No. 0-19065)                                                                                                                          
|10(e)*      | Employment Agreement by and among Sandy Spring Bancorp, Inc., Sandy Spring Bank, and Philip J. Mantua (incorporated by reference to Exhibit 10.1 to Form 8-K filed on January 17, 2012, SEC File No. 0-19065)                                                                                
|10(f)*      | Employment Agreement by and among Sandy Spring Bancorp, Inc., Sandy Spring Bank, and Daniel J. Schrider (incorporated by reference to Exhibit 10(h) to Form 10-K for the year ended December 31, 2008, SEC File No. 0-19065)                                                                 
|10(g)*      | Form of Sandy Spring National Bank of Maryland Officer Group Term Replacement Plan (incorporated by reference to Exhibit 10(r) to Form 10-K for the year ended December 31, 2001, SEC File No. 0-19065)                                                                                      
|10(h)*      | Sandy Spring Bancorp, Inc. Directors’ Stock Purchase Plan (incorporated by reference to Exhibit 4 to Registration Statement on Form S-8, File No. 333-166808)                                                                                                                                
|10(i)*      | Sandy Spring Bank Executive Incentive Retirement Plan (incorporated by reference to Exhibit 10(v) to Form 10-K for the year ended December 31, 2007, SEC File No. 0-19065)                                                                                                                   
|10(j)*      | Sandy Spring Bancorp, Inc. 2011 Employee Stock Purchase Plan (incorporated by reference to Appendix A of the Definitive Proxy Statement filed on March 28, 2011, SEC File No. 0-19065)                                                                                                       
|10(k)*      | Change in Control Agreement by and among Sandy Spring Bancorp, Inc., Sandy Spring Bank, and R. Louis  Caceres (incorporated by reference to Exhibit 10(m) to Form 10-K for the year ended December 31, 2011, SEC File No. 0-19065)                                                           
|10(l)*      | Employment Agreement by and among Sandy Spring Bancorp, Inc., Sandy Spring Bank, and Joseph J. O’Brien, Jr. (incorporated by reference to Exhibit 10.2 to Form 8-K filed on January 17, 2012, SEC File No. 0-19065)                                                                          
|10(m)*      | Second Amendment to Employment Agreement Between Sandy Spring Bancorp, Inc., Sandy Spring Bank and Daniel J. Schrider dated January 1, 2009 (incorporated by reference to Exhibit 10.1 to Form 8-K filed on March 7, 2013, SEC File No. 0-19065)                                             





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|10(n)* | Amendment to Employment Agreement Between Sandy Spring Bancorp, Inc., Sandy Spring Bank and Philip J. Mantua dated January 13, 2012 (incorporated by reference to Exhibit 10.2 to Form 8-K filed on March 7, 2013, SEC File No. 0-19065)                                                                                                                                                                                                                                                
|------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|10(o)* | Amendment to Employment Agreement Between Sandy Spring Bancorp, Inc., Sandy Spring Bank and Joseph J. O’Brien, Jr. dated January 13, 2012 (incorporated by reference to Exhibit 10.3 to Form 8-K filed on March 7, 2013, SEC File No. 0-19065)                                                                                                                                                                                                                                          
|10(p)* | Amendment to Change in Control Agreement Between Sandy Spring Bancorp, Inc., Sandy Spring Bank and R. Louis Caceres dated March 9, 2012 (incorporated by reference to Exhibit 10.4 to Form 8-K filed on March 7, 2013, SEC File No. 0-19065)                                                                                                                                                                                                                                            
|10(q)* | Change in Control Agreement Between Sandy Spring Bancorp, Inc., Sandy Spring Bank and Ronald E. Kuykendall dated March 7, 2013 (incorporated by reference to Exhibit 10(t) to Form 10-K for the year ended December 31, 2013, SEC File No. 0-19065)                                                                                                                                                                                                                                     
|10(r)* | Sandy Spring Bancorp, Inc. 2015 Omnibus Incentive Plan (incorporated by reference to Appendix A of the Definitive Proxy Statement filed on March 31, 2015,  SEC File No. 0-19065)                                                                                                                                                                                                                                                                                                       
|10(s)* | Separation
    and Consulting Agreement by and between Sandy Spring Bancorp, Inc., Sandy Spring Bank and Shaza L. Andersen dated December
    29, 2017 (incorporated by reference to Exhibit 10.1 to Form 8-K filed on January 2, 2018, SEC File No. 0-19065)                                                                                                                                                                                                                           
|10(t)* | WashingtonFirst Bank Supplemental Executive Retirement Agreement effective October 1, 2014 between WashingtonFirst Bank and Joseph S. Bracewell (incorporated by reference to Exhibit 10.17 to Form 8-K filed by WashingtonFirst Bankshares, Inc. on October 17, 2014, SEC File No. 001-35768)                                                                                                                                                                                          
|10(u)* | WashingtonFirst Bank Supplemental Executive Retirement Agreement effective October 1, 2014 between WashingtonFirst Bank and Shaza L. Andersen (incorporated by reference to Exhibit 10.13 to Form 8-K filed by WashingtonFirst Bankshares, Inc. on April 29, 2014, SEC File No. 001-35768)                                                                                                                                                                                              
|21     | Subsidiaries (incorporated by reference to Exhibit 21 to Form 10-K for the year ended December 31, 2017, SEC File No. 0-19065)                                                                                                                                                                                                                                                                                                                                                          
|23(a)  | Consent of Ernst and Young LLP                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|31(a)  | Rule 13a-14(a)/15d-14(a) Certification                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|31(b)  | Rule 13a-14(a)/15d-14(a) Certification                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|32(a)  | 18 U.S.C. Section 1350 Certification                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|32(b)  | 18 U.S.C. Section 1350 Certification                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|101    | The following materials from the Sandy Spring Bancorp, Inc. Annual Report on Form 10-K for the year ended December 31, 2017 formatted in Extensible Business Reporting Language (XBRL): (i) the Consolidated Statements of Condition; (ii) the Consolidated Statements of Income; (iii) the Consolidated Statements of Comprehensive Income; (iv) the Consolidated Statements of Cash Flows; (v) the Consolidated Statements of Changes in Stockholders’ Equity; and (vi) related notes.





* Management Contract
or Compensatory Plan or Arrangement filed pursuant to Item 15(b) of this Report.





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SIGNATURES

Pursuant to the requirements of Section 13 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.





|SANDY SPRING BANCORP, INC. |                                       | 
|-------------------------- | ------------------------------------- | 
|(Registrant)               |                                       | 
|                           |                                       | 
|By:                        | /s/ Daniel J. Schrider                | 
|                           | Daniel J. Schrider                    | 
|                           | President and Chief Executive Officer | 





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