Dine Brands Global, Inc.

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

Filed by the Registrant

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Filed by a Party other than the Registrant

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Check the appropriate box:

Dine Brands Global, Inc.

(Name of Registrant as Specified In Its

Charter

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(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

Notice of 2026 Annual Meeting and Proxy Statement

2026 PROXY STATEMENT

Dear Fellow Stockholders:

We are pleased to invite you to attend the 2026 Annual Meeting of Stockholders of Dine Brands Global, Inc. (the “Annual Meeting”), which will be held on Thursday, May 14, 2026, at 8:00 a.m., Mountain Time, at The Inn at 500 Capitol, 500 South Capitol Boulevard, Boise, Idaho 83702. At this year’s Annual Meeting, you will be asked to: (i) elect the ten directors identified in this proxy statement; (ii) ratify the appointment of KPMG LLP as our independent auditor for the 2026 fiscal year; (iii) approve, on an advisory basis, the compensation of our named executive officers; (iv) approve, on an advisory basis, the right for stockholders to call a special meeting of the stockholders at a 25% ownership threshold; and (v) vote on a stockholder proposal regarding the right of stockholders to call a special meeting of stockholders at a 15% ownership threshold.

Whether or not you plan to attend the Annual Meeting, we hope you will vote as soon as possible. Voting your proxy will ensure your representation at the Annual Meeting. You can vote your shares over the Internet, by telephone or by using a traditional proxy card. Instructions on each of these voting methods are outlined in the enclosed proxy statement.

We urge you to review carefully the proxy materials and to vote: (i) FOR the election of each of the directors identified in this proxy statement; (ii) FOR the ratification of the appointment of KPMG LLP as our independent auditor; (iii) FOR the approval, on an advisory basis, of the compensation of our named executive officers; (iv) FOR the approval, on an advisory basis, of the right for stockholders to call a special meeting of the stockholders at a 25% ownership threshold; and (v) AGAINST the stockholder proposal regarding the right of stockholders to call a special meeting of stockholders at a 15% ownership threshold.

Thank you for your continued support of and interest in Dine Brands Global, Inc. We look forward to seeing you on May 14 th.

Sincerely yours,

2026 PROXY STATEMENT

NOTICE OF THE ANNUAL MEETING OF STOCKHOLDERS TO BE HELD ON MAY 14, 2026

To the Stockholders of Dine Brands Global, Inc.:

NOTICE IS HEREBY GIVEN that the 2026 Annual Meeting of Stockholders (the “Annual Meeting”) of Dine Brands Global, Inc., a Delaware corporation (the “Corporation”), will be held at The Inn at 500 Capitol, 500 South Capitol Boulevard, Boise, Idaho 83702, on Thursday, May 14, 2026, at 8:00 a.m., Mountain Time, for the following purposes as more fully described in the accompanying proxy statement:

Only stockholders of record at the close of business on March 18, 2026, the record date for the Annual Meeting, are entitled to notice of, and to vote at, the Annual Meeting and any adjournment thereof.

By Order of the Board of Directors,

Christine K. Son,

Senior Vice President, Legal, General Counsel and Secretary

2026 PROXY STATEMENT

Important Notice Regarding the Availability of

Proxy Materials for the Annual Meeting of Stockholders

of Dine Brands Global, Inc.

to be Held on May 14, 2026

The notice of the Annual Meeting, proxy statement, 2025 annual report to stockholders and the means to vote by Internet are available atwww.envisionreports.com/DIN.

Your Vote is Important

Please vote as promptly as possible by using the Internet or telephone or by signing, dating, and returning the proxy card. If you did not receive a paper copy of the proxy statement with the proxy card and would like to vote by proxy card, please refer to the instructions on requesting a paper copy of these materials in this proxy statement. All stockholders are cordially invited to attend the Annual Meeting. If you attend the Annual Meeting, you may vote during the meeting if you wish, even if you have previously voted by another method.

2026 PROXY STATEMENT

TABLE OF CONTENTS

2026 PROXY STATEMENT

PROXY STATEMENT FOR THE 2026 ANNUAL MEETING OF STOCKHOLDERS

PROXY STATEMENT FOR THE 2026 ANNUAL MEETING OF STOCKHOLDERS