Exhibit 99.1

THE ADVISORY BOARD COMPANY REPORTS

RESULTS FOR QUARTER ENDED SEPTEMBER 30, 2013

Company Reports Quarterly Revenue Growth of 16%, Contract Value of $491 Million,

and Announces Acquisition of Care Team Connect, Inc.

WASHINGTON, D.C. — (November 4, 2013) — The Advisory Board Company (NASDAQ: ABCO) today announced financial results for the quarter ended September 30, 2013, which is the second quarter of its 2014 fiscal year. Revenue for the quarter increased 16% to $128.3 million, from $110.8 million for the quarter ended September 30, 2012. Contract value increased 13% to $491.3 million as of September 30, 2013, up from $435.1 million as of September 30, 2012. For the quarter ended September 30, 2013, net income attributable to common stockholders was $9.0 million, or $0.24 per diluted share, compared to net income attributable to common stockholders of $7.5 million, or $0.21 per diluted share, for the quarter ended September 30, 2012. For the quarter ended September 30, 2013, adjusted EBITDA was $22.3 million, up from $20.8 million for the quarter ended September 30, 2012. Adjusted net income for the quarter ended September 30, 2013 was $11.4 million, or $0.31 per diluted share, compared to $11.4 million, or $0.31 per diluted share, for the quarter ended September 30, 2012. Adjusted EBITDA, adjusted net income, and non-GAAP earnings per diluted share are all non-GAAP financial measures.

For the six months ended September 30, 2013, revenue increased 17% to $251.6 million, from $214.9 million for the six months ended September 30, 2012. Net income attributable to common stockholders was $12.7 million, or $0.35 per diluted share, for the six months ended September 30, 2013, compared to net income attributable to common stockholders of $11.3 million, or $0.31 per diluted share, for the same period in the prior fiscal year. For the six months ended September 30, 2013, adjusted EBITDA was $44.8 million, up from $40.9 million for the six months ended September 30, 2012. Adjusted net income for the six months ended September 30, 2013 was $22.7 million, or $0.62 per diluted share, compared to $22.5 million, or $0.62 per diluted share, for the six months ended September 30, 2012.

Robert Musslewhite, Chief Executive Officer of The Advisory Board Company, commented, “We are pleased with our strong revenue and earnings growth for the quarter. In markets experiencing tremendous change and transformation, our continuing growth indicates the impact we are having on our members’ most important challenges. As we progress through the important December quarter, across all areas of the business, everyone is fully focused on driving outstanding value for our members and flawless execution.”

Acquisition of Care Team Connect, Inc. and Launch of New Program

The Company announced the acquisition as of October 8, 2013 of Care Team Connect, Inc., a leading provider of comprehensive care management workflow solutions and analytics. The transaction enhances The Advisory Board Company’s existing suite of population health technologies and service offerings and affirms the Company’s position as a leader in the care management market.

Robert Musslewhite commented, “We are excited to add Care Team Connect’s outstanding care management technology and exceptional talent to the Advisory Board’s portfolio of solutions, particularly given our members’ need for effective population health capabilities in the current health care environment. These new tools will supplement our strong portfolio, and, in particular, are a great addition to our Crimson suite of clinical programs. This provider-oriented workflow tool for care management allows the Advisory Board to offer a more comprehensive array of research, technology, and services to help members with all aspects of population health management.”

Mr. Musslewhite continued, “I am excited that we will be bringing this technology to the market without delay. As such, I am pleased to announce today the launch of our newest program, Crimson Care Management, which leverages Care Team Connect’s technology to serve hospitals and health systems seeking to implement a care management workflow tool to build their population health management capabilities. We are optimistic about the impact that this new program will have for our members, particularly given Care Team Connect’s strong relationships with its clients, which include MissionPoint Health Partners in Nashville, Tennessee; Michigan Pioneer ACO in Southfield, Michigan; MemorialCare in Fountain Valley, California; and Integrated Health Partners in Battle Creek, Michigan.”

Care Team Connect’s Chief Executive Officer and founder Ben Albert added, “All of us at Care Team Connect are thrilled to join forces with The Advisory Board Company to continue to build a powerful portfolio for population health management. Given the Advisory Board’s deep knowledge base of best practices, powerful Crimson platform and outstanding member network, I am confident that being a part of this exceptional organization will permit Care Team Connect to have even greater impact on health care delivery in the United States.”

Mr. Musslewhite concluded, “We are pleased to welcome Care Team Connect’s talented staff to The Advisory Board Company. They have exceptional experience and expertise, and the company’s values, service ethic, and outstanding client relationships are a great fit with our own. I am very excited about this infusion of talent and capabilities, and I look forward to our collective success.”

Outlook for Calendar Year 2013

The Company reaffirmed its previously announced calendar year 2013 guidance for revenue, adjusted EBITDA, and non-GAAP earnings per diluted share. For calendar year 2013, the Company expects revenue to be in a range of approximately $500 million to $505 million, adjusted EBITDA to be in a range of approximately $87.5 million to $92.5 million, and non-GAAP earnings per diluted share to be in a range of approximately $1.15 to $1.25. For calendar year 2013, the Company expects share-based compensation expense to be approximately $17.5 million, and amortization of acquisition-related intangible assets to be in a range of $7 million to $8 million. For fiscal year 2014, the Company expects an effective tax rate in a range of approximately 38% to 39%. The Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2013 contains information on the calculation of adjusted EBITDA and non-GAAP earnings per diluted share.

Non-GAAP Financial Measures

This press release and the accompanying tables present information about the Company’s adjusted EBITDA, adjusted net income, and non-GAAP earnings per diluted share, which are non-GAAP financial measures provided as a complement to the results provided in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The term “adjusted EBITDA” for the three and six months ended September 30, 2013 and 2012 refers to net income attributable to common stockholders before adjustment for the items set forth in the first table. The term “adjusted net income” for the three and six months ended September 30, 2013 and 2012 refers to net income attributable to common stockholders excluding the net of tax effect of the items set forth in the second table below. The term “non-GAAP earnings per diluted share” for the three and six months ended September 30, 2013 and 2012 refers to earnings per diluted share excluding the net of tax effect of the items set forth in the third table below.

A reconciliation of the foregoing historical non-GAAP financial measures to the most directly comparable historical GAAP financial measures is provided below for each of the periods indicated. It is not practicable to provide a reconciliation of forecasted adjusted EBITDA or non-GAAP earnings per diluted share to the most directly comparable GAAP financial measures because certain items required for the forecast of such GAAP financial measures, including fair value adjustments to acquisition-related earn-out liabilities, equity in loss of unconsolidated entity, and gains and losses on investment in common stock warrants, cannot reasonably be estimated or predicted at this time.

Web and Conference Call Information

As previously announced, the Company will hold a conference call to discuss its second quarter performance this evening, November 4, 2013, at 5:30 p.m. Eastern Time. The conference call will be available via live webcast on the Company’s website at www.advisory.com/IR. To participate by telephone, the dial-in number is 888.317.6016. Participants are advised to dial in at least five minutes prior to the call to register. The webcast will be archived for seven days from 8:00 p.m. Eastern Time on Monday, November 4, until 11:00 p.m. Eastern Time on Monday, November 11, 2013.

About The Advisory Board Company

The Advisory Board Company is a global research, technology, and consulting firm partnering with 165,000 leaders in 4,100 organizations across health care and higher education. Through its innovative membership model, the Company collaborates with executives and their teams to elevate performance and solve their most pressing challenges. The Company provides strategic guidance, actionable insights, web-based software solutions, and comprehensive implementation and management services. For more information, visit the firm’s website, www.advisory.com.

Forward-Looking Statements

This news release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements, including the Company’s expectations regarding its revenue, adjusted EBITDA, non-GAAP earnings per diluted share, share-based compensation expense, amortization of acquisition-related intangibles, and effective tax rate for calendar year 2013 are based on information available to the Company as of November 4, 2013, the date of this news release, as well as the Company’s current projections, forecasts, and assumptions, and are subject to risks and uncertainties. You are hereby cautioned that these statements may be affected by certain factors, including those set forth below. Consequently, actual operations and results may differ materially from the results discussed or implied in the forward-looking statements, and reported results should not be considered as an indication of future performance. Factors that could cause actual results to differ materially from those indicated or implied by the forward-looking statements include, among others, changes in the financial condition of the health care industry, our dependence on renewal of membership-based services, the need to attract new business and retain current members and qualified personnel, new product development, competition, risks associated with the Company’s software tools and management and advisory services, risks relating to privacy, information security, and other health care-related laws and standards, maintaining our third-party provider relationships and strategic alliances, our ability to license technology from third parties, impairment of goodwill, and various factors related to income and other taxes, as well as other risks and uncertainties described in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2013, which is available for review on the Company’s website at www.advisory.com/IR and at the Securities and Exchange Commission’s website at www.sec.gov. Additional information will also be set forth in the Company’s Report on Form 10-Q for the quarter ended September 30, 2013, which will be filed with the Securities and Exchange Commission in November 2013.

Accordingly, readers are cautioned not to place undue reliance on the forward-looking statements made in this news release, which speak only as of the date of this news release. The Company does not undertake to update any of its forward-looking statements, whether as a result of circumstances or events that arise after the date they are made, new information, or otherwise.

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THE ADVISORY BOARD COMPANY

UNAUDITED CONSOLIDATED STATEMENTS OF INCOME

AND OTHER OPERATING STATISTICS

(In thousands, except per share data)

THE ADVISORY BOARD COMPANY

CONSOLIDATED BALANCE SHEETS

(In thousands)

THE ADVISORY BOARD COMPANY

UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)