UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a)

of the Securities Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐	Preliminary Proxy Statement	☐	Confidential, for Use of the Commission
☐	Definitive Proxy Statement		Only (as permitted by Rule 14a-6(e)(2))
☒	Definitive Additional Materials
☐	Soliciting Material under §240.14a-12

SYNAPTICS INCORPORATED

(Name of Registrant as Specified in Its Charter)

N/A

(Name of Person(s) Filing Proxy Statement, If Other Than the Registrant)

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☐  Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

Your Vote Counts! SYNAPTICS INCORPORATED 2024 Annual Meeting Vote by October 28, 2024 11:59 PM ET SYNAPTICS INCORPORATED 1109 MCKAY DRIVE SAN JOSE, CA 95131 You invested in SYNAPTICS INCORPORATED and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the stockholder meeting to be held on October 29, 2024. Get informed before you vote View the Notice & Proxy Statement, Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to October 15, 2024. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. For complete information and to vote, visit www. ProxyVote.com Control # Smartphone users Point your camera here and vote without entering a control number Vote Virtually at the Meeting* October 29, 2024 9:00 AM PDT Virtually at: www.virtualshareholdermeeting.com/SYNA2024 *Please check the meeting materials for any special requirements for meeting attendance.

Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters. Board Voting Items Recommends 1. Election of Directors Nominees: 1a. Jeffrey D. Buchanan For 1b. Keith B. Geeslin For 1c. James L. Whims For 2. Proposal to ratify the appointment of KPMG LLP, an independent registered public accounting firm, as the Company’s independent auditor for the fiscal year ending June 28, 2025. For 3. Proposal to approve the Company’s amended and restated 2019 Equity and Incentive Compensation Plan. For 4. Proposal to approve, on a non-binding advisory basis, the compensation of the Company’s Named Executive Officers. For NOTE: Such other business as may properly come before the meeting or any adjournment or postponement thereof. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”.