Exhibit 99.1

MARCUS & MILLICHAP, INC. REPORTS THIRD QUARTER

2015 FINANCIAL RESULTS

- Third Quarter Revenue Increased 10% — YTD Revenue Increased 22% -

- Total Sales and Financing Professionals Reached All Time High -

CALABASAS, Calif., November 5, 2015 —(BUSINESS WIRE)— Marcus & Millichap, Inc. (the “Company”, “Marcus & Millichap”) (NYSE: MMI), a leading national brokerage firm specializing in commercial real estate investment sales, financing, research and advisory services, today reported financial results for the third quarter ended September 30, 2015. Highlights include:

Third Quarter 2015 Results Compared to Third Quarter 2014

Nine Months 2015 Results Compared to Nine Months 2014

“Our third quarter results reflect ongoing success in effectively executing our growth strategy. We realized healthy year over year growth of 10.5% in total brokerage transactions and 17.6% in our $1 to $10 million private client segment, in brokerage,” stated John Kerin, president and CEO. “We also maintained our focus on driving volume in our specialty divisions, and saw financing revenue growth of 38.2% over the third quarter of 2014. We achieved a healthy growth rate despite heightened global economic concerns, negative headlines and increased volatility in the equity markets,” Mr. Kerin added. “While we continue to see normalization in the pace of our transaction growth as anticipated, we believe that our growth plan will continue to drive growth even as the real estate cycle matures.”

Third Quarter 2015 Results Compared to Third Quarter 2014

Total revenues for the third quarter of 2015 were $165.9 million, compared to $150.9 million for the same period in the prior year, an increase of $15.0 million, or 9.9%. The increase in total revenues is primarily a result of growth in revenues from real estate brokerage commissions which amounted to $151.9 million for the three months ended September 30, 2015 compared to $140.2 million for the same period in the prior year, an increase of $11.7 million or 8.4%. This was driven by a combination of the growth in the number of investment sales

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transactions and average commission rates. The rise in average commission rate is due to an increase in the proportion of our $1 to $10 million private client transactions as compared to our larger transactions in the institutional segment. These transactions generally earn a higher commission rate. Growth in financing fees, contributed the remaining increase in total revenues.

Total operating expenses for the third quarter of 2015 were $138.5 million, compared to $127.2 million for the same period in the prior year, an increase of $11.3 million, or 8.9%. The increase was primarily driven by a $9.7 million or 10.6% rise in cost of services, which are variable commissions paid to the Company’s investment sales professionals and compensation-related costs in connection with our financing activities. Cost of services as a percent of total revenues increased to 61.5% compared to 61.2% for the same period in the prior year primarily due to an increase in the proportion of transactions closed by our more senior investment sales professionals whose commission rates generally increase during the year as they meet certain production thresholds.

Selling, general and administrative expense increased by $1.6 million, or 4.6% during the third quarter of 2015 as compared to the same period in the prior year. The increase was primarily due to (i) salaries and related benefits which are correlated to higher headcount in corporate to support our growth; (ii) sales and promotional expenses driven by marketing expenses to support increased sales activity; (iii) stock-based compensation expense resulting from an increase in the Company’s stock price, which impacted stock-based compensation expense of RSU grants to the Company’s independent contractors, which are required to be measured at fair value and incremental stock-based awards granted since the third quarter of 2014; and (iv) other expense categories primarily driven by our expansion and business growth. The increases were partially offset by a decrease in legal costs due to settlement of outstanding litigation.

Net income for the third quarter of 2015 was $15.2 million or $0.39 per common share (Basic and Diluted) compared to net income of $13.5 million or $0.35 per common share (Basic and Diluted) for the same period in the prior year. Adjusted EBITDA for the third quarter of 2015 was $29.6 million compared to adjusted EBITDA of $25.6 million for the same period in the prior year.

Nine Months 2015 Results Compared to Nine Months 2014

Total revenues for the nine months ended September 30, 2015 were $485.9 million, compared to $399.7 million for the same period in the prior year, an increase of $86.2 million, or 21.6%. Operating expenses for the nine months ended September 30, 2015 were $405.2 million compared to $342.2 million for the same period in the prior year, representing an increase of $62.9 million, or 18.4%. Cost of services as a percent of total revenues increased to 60.4% compared to 60.1% for the same period in the prior year. The Company reported net income for the nine months ended September 30, 2015 of $46.4 million compared with net income of $33.1 million for the same period in the prior year. Adjusted EBITDA for the nine months ended September 30, 2015 was $88.9 million, which represents an increase of $25.7 million, or 40.8%, as compared to $63.1 million in the prior year.

Business Outlook

Commenting on the Company’s business outlook, Mr. Kerin said “Looking ahead, we believe we are well positioned for future growth albeit at more normalized rates. Our leading market position and room for share expansion within the vast, more stable and active private client segment, national coverage in all property types and opportunity to grow our financing business further remain the key drivers of our growth plan. We continue to benefit from a healthy environment for commercial real estate, capital availability and a highly experienced management team supportive of our strategy.”

Conference Call Details

Marcus & Millichap will host a conference call today to discuss its results at 2:00 p.m. Pacific Time/5:00 p.m. Eastern Time. To participate in the conference call, callers from the United States and Canada should dial (877) 407-4018

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ten minutes prior to the scheduled call time. International callers should dial +1 (201) 689-8471. For those unable to participate during the live broadcast, a telephonic replay of the call will also be available from 5:00 p.m. Pacific Time/8:00 p.m. Eastern Time on Thursday, November 5, 2015 through 8:59 p.m. Pacific Time/11:59 p.m. Eastern Time on Thursday, November 19, 2015 by dialing (877) 870-5176 in the United States and Canada or +1 (858) 384-5517 internationally and entering passcode 13623004.

About Marcus & Millichap, Inc.

Marcus & Millichap, Inc. is a leading national brokerage firm specializing in commercial real estate investment sales, financing, research, and advisory services. As of September 30, 2015, the Company has over 1,500 investment sales and financial professionals in 80 offices who provide investment brokerage and financing services to sellers and buyers of commercial real estate. The Company also offers market research, consulting and advisory services to our clients. Marcus & Millichap closed 7,667 transactions in 2014, with a sales volume of approximately $33.1 billion. For additional information, please visit www.MarcusMillichap.com.

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MARCUS & MILLICHAP, INC.

CONDENSED CONSOLIDATED STATEMENTS OF NET

AND COMPREHENSIVE INCOME

(dollar and share amounts in thousands, except per share amounts)

(Unaudited)

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MARCUS & MILLICHAP, INC.

KEY OPERATING METRICS SUMMARY

(Unaudited)

Total sales volume was $9.4 billion for the three months ended September 30, 2015, encompassing 2,212 transactions consisting of $6.4 billion for real estate brokerage (1,596 transactions), $1.2 billion for financing (409 transactions) and $1.8 billion in other transactions, including consulting and advisory services (207 transactions). Total sales volume was $26.9 billion for the nine months ended September 30, 2015, encompassing 6,255 transactions consisting of $19.9 billion for real estate brokerage (4,522 transactions), $3.3 billion for financing (1,135 transactions) and $3.7 billion in other transactions, including consulting and advisory services (598 transactions). As of September 30, 2015, the Company had 1,433 investment sales professionals and 83 financing professionals. Key metrics for Real Estate Brokerage and Financing are as follows:

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MARCUS & MILLICHAP, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(dollar amounts in thousands, except per share amounts)

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MARCUS & MILLICHAP, INC

ADJUSTED EBITDA RECONCILIATION

(Unaudited)

Adjusted EBITDA, which the Company defines as net income before interest income/expense, taxes, net realized gains on marketable securities, available for sale, depreciation and amortization and stock-based compensation is a non-GAAP financial measure. The Company uses Adjusted EBITDA in its business operations to, among other things, evaluate the performance of its business, develop budgets and measure its performance against those budgets. The Company also believes that analysts and investors use Adjusted EBITDA as a supplemental measure to evaluate its overall operating performance. However, Adjusted EBITDA has material limitations as an analytical tool and should not be considered in isolation or as a substitute for analysis of the Company’s results as reported under U.S. generally accepted accounting principles (“U.S. GAAP”). The Company finds Adjusted EBITDA as a useful tool to assist in evaluating performance because it eliminates items related to capital structure and taxes and non-cash stock-based compensation charges. In light of the foregoing limitations, the Company does not rely solely on Adjusted EBITDA as a performance measure and also considers its U.S. GAAP results. Adjusted EBITDA is not a measurement of the Company’s financial performance under U.S. GAAP and should not be considered as an alternative to net income, operating income or any other measures derived in accordance with U.S. GAAP. Because Adjusted EBITDA is not calculated in the same manner by all companies, it may not be comparable to other similarly titled measures used by other companies.

A reconciliation of the most directly comparable GAAP financial measure, net income, to Adjusted EBITDA is as follows (in thousands):

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