SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
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                                    FORM 11-K


               (X) ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
                 SECURITIES EXCHANGE ACT OF 1934 (FEE REQUIRED)

                    For the fiscal year ended August 31, 2000

                                       or

               ( ) TRANSITION REPORT PURSUANT TO SECTION 15(d) OF
              THE SECURITIES EXCHANGE ACT OF 1934 (NO FEE REQUIRED)

               For the transition period from ___________________

                         Commission File Number: 1-11869


           FactSet Research Systems Inc. Employee Stock Ownership Plan
           -----------------------------------------------------------
                            (Full title of the plan)


                          FactSet Research Systems Inc.
                               One Greenwich Plaza
                          Greenwich, Connecticut 06830
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                              (Address of the plan)



                          FactSet Research Systems Inc.
                   -------------------------------------------
          (Name of issuer of the securities held pursuant to the plan)

                               One Greenwich Plaza

                          Greenwich, Connecticut 06830
                          ----------------------------
                (Address of issuer's principal executive office)


FactSet Research Systems Inc. Employee Stock Ownership Plan INDEX Page ---- Report of Independent Accountants 3 Financial Statements: - --------------------- Statement of Net Assets Available for Plan Benefits at August 31, 2000 and 1999 4 Statement of Changes in Net Assets Available for Plan Benefits for the Year Ended August 31, 2000 5 Notes to Financial Statements 6 - 8 Supplemental Schedule: - ---------------------- Schedule of Assets Held for Investment Purposes at August 31, 2000 9 Signature 10 2

Report of Independent Accountants To the Participants and Administrator of the FactSet Research Systems Inc. Employee Stock Ownership Plan: In our opinion, the accompanying statements of net assets available for benefits and the related statement of changes in net assets available for benefits present fairly, in all material respects, the net assets available for benefits of the FactSet Research Systems Inc. Employee Stock Ownership Plan (the "Plan") at August 31, 2000 and 1999, and the changes in net assets available for benefits for the year ended August 31, 2000, in conformity with accounting principles generally accepted in the United States of America. These financial statements are the responsibility of the Plan's management; our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these statements in accordance with auditing standards generally accepted in the United States of America, which require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. Our audits were conducted for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental schedule of assets held for investment purposes is presented for the purpose of additional analysis and is not a required part of the basic financial statements but is supplemental information required by the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. This supplemental schedule is the responsibility of the Plan's management. The supplemental schedule has been subjected to the auditing procedures applied in the audits of the basic financial statements and, in our opinion, is fairly stated in all material respects in relation to the basic financial statements taken as a whole. PricewaterhouseCoopers LLP Hartford, CT February 27, 2001 3

FactSet Research Systems Inc. Employee Stock Ownership Plan Statement of Net Assets Available for Plan Benefits August 31, 2000 and 1999 ASSETS: At August 31, 2000 1999 ---- ---- Investment at fair value: Common stock of FactSet Research Systems Inc. $74,356,137 $56,863,460 Receivables from FactSet Research Systems Inc.: Employer contributions 1,300,000 1,000,000 Dividends 65,249 60,698 ---------- ---------- Total assets 75,721,386 57,924,158 LIABILITIES: - - ----------- ----------- Net assets available for plan benefits $75,721,386 $57,924,158 =========== =========== The accompanying notes are an integral part of these financial statements 4

FactSet Research Systems Inc. Employee Stock Ownership Plan Statement of Changes in Net Assets Available for Plan Benefits For the Year Ended August 31, 2000 ADDITIONS: Contributions from FactSet Research Systems Inc. $ 1,300,000 Dividends on common stock 262,082 Appreciation in fair value of common stock 27,626,129 ---------- Total additions 29,188,211 DEDUCTIONS: Distributions to participants 11,390,983 ---------- INCREASE IN NET ASSETS DURING THE PLAN YEAR 17,797,228 Net assets available for plan benefits: Beginning of the year 57,924,158 ---------- Ending of the year $75,721,386 =========== The accompanying notes are an integral part of these financial statements 5

FactSet Research Systems Inc. Employee Stock Ownership Plan Notes to Financial Statements August 31, 2000 and 1999 Note 1 - DESCRIPTION OF THE PLAN GENERAL The FactSet Research Systems Inc. Employee Stock Ownership Plan (the "Plan" or "ESOP") was established effective September 1, 1985 and is subject to the provisions of the Employee Retirement Income Security Act of 1974 ("ERISA"). The Plan is intended to constitute a "qualified plan" within the meaning of Sections 401(a) and 501(a) of the Internal Revenue Code of 1986, as amended (the "Code"), and ERISA, as amended, and to qualify as an "employee stock ownership plan" under Section 4975(e)(7) of the Code. The Plan is funded by optional annual contributions by FactSet Research Systems Inc. ("FactSet" or the "Company") as designated by its Board of Directors. The funds held under the Plan are invested in the Common Stock of FactSet. The Plan owned 2,174,951 and 2,455,642 shares of the Company's common stock at August 31, 2000 and 1999, respectively. Effective August 31, 2000 and 1999, the Board of Directors authorized contributions of $1,300,000 and $1,000,000, respectively, to the Plan. Such amounts were used to purchase shares of the Company's common stock on September 1, 2000 and 1999, respectively, and are reflected as a receivable from FactSet on the Statement of Net Assets Available for Plan Benefits. Employees of the Company at fiscal year end (August 31) who have performed at least 1,000 hours of service during the plan year are generally eligible to participate in the Plan. When employee work records are not kept on an hourly basis, employees are credited with 190 hours of service for each month in which one hour of service was performed. Contributions in the form of the Company's common stock are allocated to participant accounts in the proportion that each eligible participant's compensation bears to the aggregate compensation of all participants during the plan year. Eligible compensation for participants is capped at $160,000 and $120,000 in 2000 and 1999, respectively. Contributions begin to vest upon completion of the employee's third year of service at a rate of 20% and continue at that rate in each successive year of service. Forfeited, non-vested interests in the Plan are allocated to the other participants' accounts upon meeting certain criteria as defined in the Plan. There were 14,648 and 2,424 shares forfeited and reallocated (in the same manner as employer contributions) in 2000 and 1999, respectively. The vested interests of plan participants are distributed in a lump sum upon such participant reaching the age of 65. A participant who reaches the age of 65 but remains employed by the Company may elect to receive the distribution of his or her vested interest as of the last day in any subsequent plan year, provided that in the case of a five percent shareholder the distribution shall begin no later than April 1, following the calendar year in which the participant attains the age of 70 1/2. When employment is terminated, distributions of vested interests are made according to the election of the former employee. Such distributions are generally payable in a lump sum and are initiated upon receipt of written notification from the former employee. The vested balance of a participant's account may be distributed in the form of cash, common stock of the Company or a combination thereof. The Plan may be terminated at any time by the Company. The adjudication of the Company as a bankrupt entity, an assignment for the benefit of the creditors of the Company, the dissolution or liquidation of the Company, or the permanent discontinuance of contributions by the Company shall effect the termination of the Plan. 6

ADMINISTRATION AND EXPENSES The Plan is administered by the ESOP Plan Committee, which has appointed officials of FactSet to act as trustees and assist in administering the Plan. The assets of the Plan are held in custody by The Bank of New York. USI Consulting Group has been retained to act as record keeper for the Plan. All expenses of the Plan including administrative costs are paid by the Company. Such costs include record keeping, participants reports, communications, audit fees and transfer agent fees. Note 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES BASIS OF ACCOUNTING The accompanying financial statements have been prepared according to the accrual basis of accounting. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amount of assets, liabilities and changes therein, and the disclosures of contingent assets and liabilities. Actual results could differ from these estimates. INVESTMENT VALUATION AND INCOME RECOGNITION The Plan's only investment is the common stock of FactSet. It is carried at fair value at August 31, 2000 and 1999 based on the closing market price of FactSet's common stock on the New York Stock Exchange. Dividend Income is accrued on the ex-dividend date. Upon receipt of dividends, the Plan purchases additional shares of FactSet common Stock and allocates such shares to participants accounts in the proportion of each participant's account to the total. Purchases and sales of securities are recorded on a trade-date basis. Realized gains and losses from security transactions are reported on the average cost method. UNREALIZED APPRECIATION Unrealized appreciation is the difference between the fair value and original cost basis of the Plan investment in the Company's common stock at August 31, 2000 and 1999 based on a weighted average share basis. Unrealized appreciation at August 31, 2000 and 1999 was $69,732,185 and $ 52,828,888 respectively. Note 3 - INCOME TAXES The Internal Revenue Service has determined and informed the Company by a determination letter dated April 18, 1985, that the Plan is qualified and the trust established under the Plan is tax-exempt, under the appropriate section of the Code. The Plan has been amended since receiving the determination letter. However, the Plan Administrator believes the Plan is currently designed and being operated in compliance with the applicable requirements of the Code. Therefore, they believe that the Plan was qualified and the related trust was tax-exempt as of the financial statement date. Note 4 - STOCK SPLITS On January 13, 2000, the Company declared a 2-for-1 stock split effected as a stock dividend. The stock split was effected as a stock dividend and was distributed on February 4, 2000 to common stockholders of record on January 21, 2000. Shares of common stock and related amounts (including dividends per share) have been retroactively restated for all stock splits. 7

Note 5 - DIVIDENDS In accordance with the Plan terms, dividends are used to purchase additional shares of FactSet common stock based on the closing price of a share of the Company's common stock on dividend payment dates. Regular quarterly dividends of $ 0.025 per common share were paid in September and December 1999 and $.03 per common share in March and June 2000. Note 6 - SUBSEQUENT EVENTS On September 18, 2000, the Board of Directors authorized the increase of maximum eligible compensation for the plan years commencing September 1, 2000 and 1999 to $170,000 and $160,000, respectively. On December 21, 2000, the Company paid a cash dividend of $0.03 per common share. 0n February 15, 2001, the Board of Directors declared a cash dividend of $0.03 per common share payable on March 21, 2001 to all common stockholders of record at the close of business on February 28, 2001. 8

Supplemental Schedule Schedule I FactSet Research Systems Inc. Employee Stock Ownership Plan Schedule of Assets Held for Investment Purposes at End of Year At August 31, 2000 (a) (b) (c) (d) (e) Description of investment including Identity of Issue, borrower, maturity date, rate of interest, Current lessor, or similar party collateral, par or maturity value Cost value - --- ---------------------------- ----------------------------------- ---- ------- ** FactSet Research Systems Inc. Common Stock 2,174,951* shares $4,623,952 $74,356,137 $34.1875/Share *Shares of common stock and related amounts give retroactive effect to the 2-for-1 stock split that occurred on February 4, 2000. **Indicates an identified person known to be a party-in-interest to the Plan. 9

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Plan Committee and the Trustee have duly caused this annual report to be signed by the undersigned thereunto duly authorized. FactSet Research Systems Inc. Employee Stock Ownership Plan By: /s/ Ernest S. Wong Date: February 28, 2001 Senior Vice President, Chief Financial Officer and Secretary 10