SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  -------------

                                    FORM 8-K

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



       Date of report (Date of earliest event reported): October 22, 2003

                            FORRESTER RESEARCH, INC.
                 (Exact Name of Registrant Specified in Charter)

          Delaware                     000-21433               04-2797789
(State or Other Jurisdiction          (Commission           (I.R.S. Employer
      of Incorporation)               File Number)         Identification No.)


400 Technology Square, Cambridge, Massachusetts               02139
(Address of Principal Executive Offices)                    (Zip Code)



Registrant's telephone number, including area code: (617) 613-6000

                                       N/A
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         (Former Name or Former Address, if Changed Since Last Report)



ITEM 7.           Financial Statements and Exhibits.

                  (c)      Exhibits

                           99.1     Press Release dated October 22, 2003.

ITEM 12.          RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

         The information contained in this current report on Form 8-K is
furnished pursuant to Item 12 of Form 8-K "Results of Operations and Financial
Condition". This information and the exhibits hereto are being furnished and
shall not be deemed to be "filed" for the purposes of Section 18 of, or
otherwise regarded as filed under, the Securities Exchange Act of 1934, as
amended. The information contained in this report shall not be incorporated by
reference into any filing of Forrester Research, Inc. with the SEC, whether made
before or after the date hereof, regardless of any general incorporation
language in such filings.

         On October 22, 2003, Forrester Research, Inc. issued a press release
announcing its financial results for the quarter ended September 30, 2003, the
full text of which is attached hereto as Exhibit 99.1.

         Forrester believes that pro forma financial results provide investors
with consistent and comparable information to aid in the understanding of
Forrester's ongoing business. Our pro forma presentation excludes the following:

         Amortization of acquisition-related intangibles - we exclude the
non-cash effect of the amortization of acquisition-related intangibles from our
pro forma results in order to more consistently present our ongoing results of
operations.

         Integration costs - we exclude the costs related to our acquisition of
Giga, which are primarily related to orientation events and data migration, in
order to present a consistent basis for quarterly comparisons.

         Impairments of non-marketable securities - we have consistently
excluded both one-time gains and one-time write-offs related to our investments
in non-marketable securities from our pro forma results in order to keep quarter
over quarter comparisons consistent.

         Reorganization costs - we exclude reorganization costs from our first
quarter 2002 pro forma results because our failure to do so would present a
misleading improvement in our pro forma results in the nine months ended
September 30, 2003 as compared to the same period in 2002.

         However, these measures should be considered in addition to, not as a
substitute for, or superior to, operating income or other measures of financial
performance prepared in accordance with generally accepted accounting principles
as more fully discussed in the Forrester's financial statements and filings with
the Securities and Exchange Commission.







                                    SIGNATURE


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                FORRESTER RESEARCH, INC.


                                By: /s/ WARREN HADLEY
                                    -----------------
                                    Name:  Warren Hadley
                                    Title: Treasurer and Chief Financial Officer


Dated: October 22, 2003








                                  Exhibit Index




Exhibit       Description                                       Page
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99.1          Press Release dated October 22, 2003.               5