Company: MMI
Filing Date: 2025-03-19
Form Type: DEFA14A
Source: 0001193125-25-057888
Chunk: 0

Company: Marcus & Millichap, Inc.
Filing Date: 2025-03-19
Form: DEFA14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 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 Only (as permitted by Rule 
 14a-6(e)(2))                                                       |

| ☐ | Definitive Proxy Statement |

| ☒ | Definitive Additional Materials |

| ☐ | Soliciting Material Pursuant to §240.14a-12 |

MARCUS & MILLICHAP, INC. (Name of Registrant as Specified in Its Charter) (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check all boxes that apply):

| ☒ | No fee required |

| ☐ | Fee paid previously with preliminary materials |

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

Important Notice Regarding MARCUS the Availability & of Proxy MILLICHAP, Materials for the Annual INC Meeting . of Stockholders of To Be Held On: Thursday, May 1, 2025 at 2:00 p.m. Pacific Time virtually at https://web.lumiconnect.com/204691330 (password: Mm2025) COMPANY NUMBER JOHN SMITH 1234 MAIN STREET ACCOUNT NUMBER APT. 203 NEW YORK, NY 10038 CONTROL NUMBER This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. If you want to receive a paper or e-mailcopy of the proxy materials you must request one. There is no charge to you for requesting a copy. To facilitate timely delivery, please make the request as instructed below before April 17, 2025. Please visit http://www.astproxyportal.com/ast/18576, where the following materials are available for view: • Notice of Annual Meeting of Stockholders • Proxy Statement • Form of Electronic Proxy Card • Annual Report on Form 10-KTO OBTAIN TELEPHONE: 888-Proxy-NA (888-776-9962)or 201