UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

September 10, 2015

Date of Report (Date of earliest event reported)

SYNAPTICS INCORPORATED

(Exact Name of Registrant as Specified in Its Charter)

1251 McKay Drive

San Jose, California 95131

(Address of Principal Executive Offices) (Zip Code)

(408) 904-1100

(Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On September 10, 2015, Synaptics Incorporated (the “Company”) participated in a conference call hosted by Needham and Company. On the call, the Company reaffirmed its previously announced financial guidance for the first fiscal quarter of 2016 and for full fiscal year 2016, including the Company’s expected full fiscal year 2016 revenue growth rate outlook, which the Company reaffirms is a growth rate of 20% to 25%.

This Current Report on Form 8-K is being furnished solely for purposes of Regulation FD for statements made during the September 10, 2015 conference call. The information in this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liability of that Section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements that are subject to the safe harbors created under the Securities Act and the Exchange Act. Forward-looking statements give our current expectations and projections relating to our financial condition, results of operations, plans, objectives, future performance and business, and can be identified by the fact that they do not relate strictly to historical or current facts. All forward-looking statements reflect our best judgment and are based on several factors relating to our operations and business environment, all of which are difficult to predict and many of which are beyond our control. Such factors include, but are not limited to, the risks as identified in the “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Business” sections of our Annual Report on Form 10-K for the fiscal year ended June 27, 2015, and other risks as identified from time to time in our Securities and Exchange Commission reports. Forward-looking statements are based on information available to us on the date hereof, and we do not have, and expressly disclaim, any obligation to publicly release any updates or any changes in our expectations, or any change in events, conditions, or circumstances on which any forward-looking statement is based. Our actual results and the timing of certain events could differ materially from the forward-looking statements.

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 hereunto duly authorized.