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| ☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

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| ☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

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| Delaware                                                      | 35-2478370                          |
| (State or other jurisdiction ofincorporation or organization) | (I.R.S. EmployerIdentification No.) |
|                                                               |                                     |
| 23975 Park Sorrento, Suite 400Calabasas, California           | 91302                               |
| (Address of principal executive offices)                      | (Zip Code)                          |

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|-------------------------------------------|--|-------------------|--|-------------------------------------------|--|--|--|--|--|--|--|--|--|--|
| Title of each class                       |  | Trading Symbol(s) |  | Name of each exchange on which registered |
| Common Stock, par value $0.0001 per share |  | MMI               |  | New York Stock Exchange                   |

|                         |         |                           |         |  |  |  |  |  |  |  |  |
|-------------------------|---------|---------------------------|---------|--|--|--|--|--|--|--|--|
| Large accelerated filer | ☒ | Accelerated filer         | ☐ |
| Non-accelerated filer   | ☐ | Smaller reporting company | ☐ |
| Emerging growth company | ☐ |                           |         |

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|             |  |                                                                                                                                                                                                                                                                                                                              |  |  |  |  |  |  |
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| Number      |  | Description                                                                                                                                                                                                                                                                                                                  |
|             |  |                                                                                                                                                                                                                                                                                                                              |
| 3.1         |  | Amended and Restated Certificate of Incorporation of Marcus & Millichap, Inc. (incorporated by reference to Exhibit 3.1 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended September 30, 2013 filed on November 22, 2013).                                                    |
|             |  |                                                                                                                                                                                                                                                                                                                              |
| 3.2         |  | Amended and Restated Bylaws of Marcus & Millichap, Inc. (incorporated by reference to Exhibit 3.2 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended September 30, 2013 filed on November 22, 2013).                                                                          |
|             |  |                                                                                                                                                                                                                                                                                                                              |
| 4.1         |  | Specimen Stock Certificate (incorporated by reference to Exhibit 4.1 to the registrant’s registration statement on Form S-1 (No. 333-191316) filed on September 23, 2013).                                                                                                                                             |
|             |  |                                                                                                                                                                                                                                                                                                                              |
| 4.2         |  | Description of the registrant’s securities registered pursuant to Section 12 of the Securities Exchange Act of 1934 (incorporated by reference to Exhibit 4.2 to the registrant’s Annual Report on Form 10-K (No. 001-36155) for the year ended December 31, 2019 filed on March 2, 2020).                       |
|             |  |                                                                                                                                                                                                                                                                                                                              |
| 10.1        |  | Transition Services Agreement by and between Marcus & Millichap, Inc. and Marcus & Millichap Company dated October 31, 2013 (incorporated by reference to Exhibit 10.3 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended September 30, 2013 filed on November 22, 2013). |
|             |  |                                                                                                                                                                                                                                                                                                                              |
| 10.2† |  | Form of Indemnification Agreement by and between Marcus & Millichap, Inc. and each of its Officers and Directors (incorporated by reference to Exhibit 10.7 to the registrant’s registration statement on Form S-1 (No. 333-191316) filed on September 23, 2013).                                                  |
|             |  |                                                                                                                                                                                                                                                                                                                              |
| 10.3† |  | Amended and Restated 2013 Omnibus Equity Incentive Plan, as amended (incorporated by reference to Exhibit 10.6 to the registrant’s Annual Report on Form 10-K (No. 001-36155) for the year ended December 31, 2017 filed on March 16, 2018).                                                                           |
|             |  |                                                                                                                                                                                                                                                                                                                              |
| 10.4† |  | Form of Stock Option Award Agreement under 2013 Omnibus Equity Incentive Plan (incorporated by reference to Exhibit 10.10 to the registrant’s registration statement on Form S-1 (No. 333-191316) filed on September 23, 2013).                                                                                        |
|             |  |                                                                                                                                                                                                                                                                                                                              |

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|              |  |                                                                                                                                                                                                                                                                                                                                    |  |  |  |  |  |  |
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| Number       |  | Description                                                                                                                                                                                                                                                                                                                        |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.5†  |  | Form of Restricted Stock Unit Award Agreement under 2013 Omnibus Equity Incentive Plan (incorporated by reference to Exhibit 10.11 to the registrant’s registration statement on Form S-1 (No. 333-191316) filed on September 23, 2013).                                                                                     |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.6†  |  | Form of Restricted Stock Award Agreement under 2013 Omnibus Equity Incentive Plan (incorporated by reference to Exhibit 10.12 to the registrant’s registration statement on Form S-1/A (No. 333-191316) filed on October 21, 2013).                                                                                      |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.7†  |  | Form of Amendment, Restatement and Freezing of Stock Appreciation Rights Agreement (Section 409A grandfathered) (incorporated by reference to Exhibit 10.14 to the registrant’s registration statement on Form S-1 (No. 333-191316) filed on September 23, 2013).                                                            |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.8†  |  | 2013 Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.16 to the registrant’s registration statement on Form S-1/A (No. 333-191316) filed on October 28, 2013).                                                                                                                                      |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.9†  |  | Executive Short-Term Incentive Plan, dated March 13, 2014 (incorporated by reference to Exhibit 99.1 to the registrant’s current report on Form 8-K (No. 001-36155) filed on March 17, 2014).                                                                                                                                |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.10† |  | Employment Agreement between the Company and Hessam Nadji effective as of March 31, 2016 (incorporated by reference to Exhibit 10.21 to the registrant’s current report on Form 8-K/A (No. 001-36155) filed on April 8, 2016).                                                                                           |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.11† |  | Marcus & Millichap, Inc. Deferred Compensation Plan (incorporated by reference to Exhibit 10.1 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended June 30, 2018 filed on August 9, 2018).                                                                                           |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.12        |  | Second Amended and Restated Credit Agreement, between the Company and Wells Fargo Bank, National Association dated July 28, 2022 (incorporated by reference to Exhibit 10.1 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) filed on August 5, 2022).                                                      |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.13        |  | First Amendment to the Second Amended and Restated Credit Agreement dated September 25, 2023, by and between Marcus & Millichap, Inc. and Wells Fargo Bank National Association (incorporated by reference to Exhibit 10.1 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) filed on November 3, 2023). |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.14† |  | Employment Agreement between the Company and Steven F. DeGennaro effective as of August 4, 2020 (incorporated by reference to Exhibit 10.1 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended September 30, 2020 filed on November 9, 2020).                                            |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.15† |  | Change in Control Policy dated August 3, 2021 (incorporated by reference to Exhibit 10.1 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended June 30, 2021 filed on August 6, 2021).                                                                                                     |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.16† |  | Amended & Restated Death & Disability Policy dated August 3, 2021 (incorporated by reference to Exhibit 10.2 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended June 30, 2021 filed on August 6, 2021).                                                                         |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.17† |  | Employment Agreement by and between John David Parker and Marcus & Millichap, Inc., dated August 4, 2022 (incorporated by reference to Exhibit 10.2 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended June 20, 2022 filed on August 5, 2022).                                      |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 10.18† |  | Employment Agreement by and between Richard Matricaria and Marcus & Millichap, Inc., dated August 4, 2022 (incorporated by reference to Exhibit 10.3 to the registrant’s quarterly report on Form 10-Q (No. 001-36155) for the quarter ended June 30, 2022 filed on August 5, 2022).                                     |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 21.1+        |  | List of Subsidiaries.                                                                                                                                                                                                                                                                                                              |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 23.1*        |  | Consent of Ernst & Young LLP.                                                                                                                                                                                                                                                                                                  |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 31.1*        |  | Certification of Chief Executive Officer pursuant to Rule 13a-14(a) under the Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                  |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 31.2*        |  | Certification of Chief Financial Officer pursuant to Rule 13a-14(a) under the Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                  |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 32.1**       |  | Certification of Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                    |
|              |  |                                                                                                                                                                                                                                                                                                                                    |
| 97+          |  | Restated Compensation Recovery Policy of Marcus & Millichap, Inc.                                                                                                                                                                                                                                                              |

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| Number |  | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|        |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|        |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| 101+   |  | The following financial statements from the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, formatted in Inline XBRL: (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Operations, (iii) Consolidated Statements of Comprehensive (Loss) Income, (iv) Consolidated Statements of Stockholders’ Equity, (v) Consolidated Statements of Cash Flows, and (vi) Notes to Consolidated Financial Statements, tagged as blocks of text and including detailed tags. |
|        |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| 104+   |  | Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)                                                                                                                                                                                                                                                                                                                                                                                                                                |

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| Dated: February 27, 2024 | Marcus & Millichap, Inc.          |
|                                   |                                       |
|                                   | /s/ Hessam Nadji              |
|                                   | Hessam Nadji                          |
|                                   | President and Chief Executive Officer |