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,
2015



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, 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 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 Act).  ̈ Yes x  No



The aggregate market value of the voting
common stock of the registrant held by non-affiliates on June 30, 2015, the last day of the registrant’s most recently completed
second fiscal quarter was approximately $653 million, based on the closing sales price of $27.26 per share of the registrant's
Common Stock on that date.



The number of outstanding shares of common
stock outstanding as of March 1, 2016.

Common stock, $1.00 par value –
23,818,385 shares



Documents Incorporated By Reference

Part III: Portions of the definitive proxy
statement for the Annual Meeting of Shareholders to be held on May 4, 2016 (the "Proxy
Statement").



_______________________

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











Explanatory Note



This Amendment No. 1 to Form 10-K (this
“Amendment”) amends the Annual Report on Form 10-K for the fiscal year ended December 31, 2015, originally filed with
the Securities and Exchange Commission (the “SEC”) on March 4, 2016 (the “Form 10-K”), by Sandy Spring
Bancorp, Inc. (the “Company”). The sole purpose of this Amendment is to re-file Exhibit 23(a), which was inadvertently
filed without the signature of the independent registered public accounting firm.



In addition, as required by Rule 12b-15
under the Securities Exchange Act of 1934, as amended, new certifications by the Company’s principal executive officer and
principal financial officer are filed as exhibits to this Amendment.



No changes have been made in this Amendment
to modify or update the other disclosures presented in the Form 10-K. This Amendment does not reflect events occurring after the
filing of the Form 10-K or modify or update those disclosures that may be affected by subsequent events. This Amendment should
be read in conjunction with the Form 10-K and the Company’s other filings made with the SEC.















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 |