Exhibit 99.1

FactSet Research Systems Announces Adjusted EPS Growth of 10% for the Third Quarter of Fiscal 2013

NORWALK, Conn., June 18, 2013 - FactSet Research Systems Inc. (NYSE:FDS) (NASDAQ:FDS), a leading provider of integrated financial information and analytical applications to the global investment community, today announced its results for the third quarter of fiscal 2013.

For the quarter ended May 31, 2013 revenues increased to $214.6 million, up 6% over the prior year. Included in this total was $2.9 million of acquired revenues from StreetAccount. Operating income was $71.6 million compared to $68.5 million in the third quarter of fiscal 2012. Net income was $53.4 million versus $48.0 million a year ago. Diluted earnings per share was $1.20 compared to $1.05 in the same period of fiscal 2012.

Adjusted net income increased 6% to $51.1 million, while adjusted diluted EPS grew 10% to $1.15. Adjusted net income and diluted EPS both exclude income tax benefits of $2.3 million or $0.05 per diluted share related to finalizing prior years’ tax returns.

A reconciliation between GAAP and adjusted financial measures is presented on page 8 of this press release.

“We again delivered double-digit diluted EPS growth and our free cash flow reached an all-time high of $92 million during the third quarter of fiscal 2013. Off-market conditions, especially on the sell-side, continue to interrupt client buying patterns and limited our ASV growth this quarter as expected,” said Philip A. Hadley, Chairman and CEO. “We continue to return capital to shareholders as evidenced by a 13% increase in our dividend and a $200 million expansion to our share repurchase program during the quarter.”

Annual Subscription Value (“ASV”)

ASV advanced $2 million excluding the impact from foreign currency during the quarter and totaled $864 million at May 31, 2013. Of this total, 83% is derived from buy-side clients and the remainder is from the sell-side firms who perform M&A advisory work and equity research. ASV at any given point in time represents the forward-looking revenues for the next 12 months from all services currently being supplied to clients.

Financial Highlights – Third Quarter of Fiscal 2013

Operational Highlights – Third Quarter of Fiscal 2013

Business Outlook

The following forward-looking statements reflect FactSet’s expectations as of today’s date. Given the number of risk factors, uncertainties and assumptions discussed below, actual results may differ materially. The Company does not intend to update its forward-looking statements until its next quarterly results announcement, other than in publicly available statements.

Fourth Quarter Fiscal 2013 Expectations

Conference Call

The Company will host a conference call today, June 18, 2013, at 11:00 a.m. (EDT) to review the third quarter fiscal 2013 earnings release. To listen, please visit the investor relations section of the Company’s website at www.factset.com.

Forward-looking Statements

This news release contains forward-looking statements based on management's current expectations, estimates and projections. All statements that address expectations or projections about the future, including statements about the Company's strategy for growth, product development, market position, subscriptions, expected expenditures and financial results are forward-looking statements. Forward-looking statements may be identified by words like "expected," "anticipates," "plans," "intends," "projects," "should," "indicates," "continues," "subscriptions" and similar expressions. These statements are not guarantees of future performance and involve a number of risks, uncertainties and assumptions. Many factors, including those discussed more fully elsewhere in this release and in FactSet's filings with the Securities and Exchange Commission, particularly its latest annual report on Form 10-K and quarterly reports on Form 10-Q, as well as others, could cause results to differ materially from those stated. These factors include, but are not limited to, the current status of the global economy; the ability to integrate newly acquired companies and businesses; the stability of global securities markets; the ability to hire qualified personnel; the maintenance of the Company's leading technological position; the impact of global market trends on the Company's revenue growth rate and future results of operations; the negotiation of contract terms with corporate vendors, data suppliers and potential landlords; the retention of key clients; the successful resolution of ongoing audits by tax authorities; the continued employment of key personnel; the absence of U.S. or foreign governmental regulation restricting international business; and the sustainability of historical levels of profitability and growth rates in cash flow generation.

About Adjusted Financial Measures

Financial measures in accordance with U.S. generally accepted accounting principles (“GAAP”) including net income and diluted earnings per share have been adjusted. These adjusted financial measures exclude $2.3 million of income tax benefits related to finalizing prior years’ tax returns. The income tax benefits, which reduced the Company’s effective tax rate from 29.0% to 25.9%, increased GAAP net income by $2.3 million and GAAP diluted EPS by $0.05 per share in the third quarter of fiscal 2013. FactSet uses these adjusted financial measures, both in presenting its results to stockholders and the investment community, and in its internal evaluation and management of the business. The Company believes that these adjusted financial measures and the information they provide are useful to investors because it permits investors to view the Company’s performance using the same tools that management uses to gauge progress in achieving its goals. Investors may benefit from referring to these adjusted financial measures in assessing the Company’s performance and when planning, forecasting and analyzing future periods and may also facilitate comparisons to its historical performance. The presentation of this financial information is not intended to be considered in isolation or as a substitute for the financial information prepared and presented in accordance with GAAP. For more information on these adjusted financial measures, please see page 8 of this release.

About Non-GAAP Free Cash Flow

The GAAP financial measure, cash flows provided by operating activities, has been adjusted to report non-GAAP free cash flow that includes the cash cost for taxes and changes in working capital, less capital expenditures. Included in the just completed third quarter was $96.6 million of net cash provided by operations and $4.2 million of capital expenditures. The presentation of free cash flow is not intended to be considered in isolation or as a substitute for the financial information prepared and presented in accordance with GAAP. FactSet uses this financial measure, both in presenting its results to stockholders and the investment community, and in the Company’s internal evaluation and management of the business. Management believes that this financial measure is useful to investors because it permits investors to view the Company’s performance using the same metric that management uses to gauge progress in achieving its goals and is an indication of cash flow that may be available to fund further investments in future growth initiatives.

About FactSet

FactSet, a leading provider of financial information and analytics, helps the world’s best investment professionals outperform. More than 49,000 users stay ahead of global market trends, access extensive company and industry intelligence, and monitor performance with FactSet’s desktop analytics, mobile applications, and comprehensive data feeds. The Company has been included in FORTUNE's Top 100 Best Companies to Work For, the United Kingdom’s Great Places to Work and France’s Best Workplaces. FactSet is listed on the New York Stock Exchange and NASDAQ (NYSE:FDS) (NASDAQ:FDS). Learn more at www.factset.com, and follow us on Twitter: www.twitter.com/factset.

FactSet Research Systems Inc.

Consolidated Statements of Income – Unaudited                            

FactSet Research Systems Inc.

Consolidated Statements of Comprehensive Income – Unaudited                        

* The unrealized (loss) gain on cash flow hedges disclosed above was net of tax benefit (expense) of $328 and $(494) for the three and nine months ended May 31, 2013, respectively, and $1,085 and $1,752 for the corresponding periods of fiscal 2012, respectively.

FactSet Research Systems Inc.

Consolidated Balance Sheets - Unaudited

FactSet Research Systems Inc.

Consolidated Statements of Cash Flows - Unaudited

Reconciliation of Adjusted and Non-GAAP Financial Measures

Financial measures in accordance with U.S. GAAP including operating income, net income and diluted earnings per share have been adjusted below. FactSet uses these adjusted financial measures, both in presenting its results to stockholders and the investment community, and in its internal evaluation and management of the business. The Company believes that these adjusted financial measures and the information they provide are useful to investors because it permits investors to view the Company’s performance using the same tools that management uses to gauge progress in achieving its goals. Adjusted measures may also facilitate comparisons to FactSet’s historical performance.

Three Months Ended May 31, 2013

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