PART II — RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)   o

			(a)		The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense
			(b)		The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and
			(c)		The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.

PART III — NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

The Audit Committee of the Board of Directors of Forrester Research, Inc. (the “Company”) has conducted an investigation into the Company’s stock option granting practices. The Company has been assisted in the investigation by the law firms of Ropes & Gray LLP and Skadden, Arps, Slate, Meagher & Flom LLP and the consulting firm of Huron Consulting Group.

The Audit Committee has identified option grants that had exercise prices lower than the fair value of the common stock on the appropriate accounting measurement dates that were not appropriately accounted for. Based on the results of the investigation, management has concluded, and the Audit Committee of the Company’s Board of Directors agreed, that the Company will need to restate its historical financial statements to record additional non-cash charges for compensation expense relating to past stock option grants and related tax impacts. The Company expects to incur some future cash expenses associated with the restatement, including potential tax-related and other payments. The Company has not yet completed its assessment of materiality for each prior period, nor has it determined the full amount of any such charges, the resulting tax and accounting impact, or which periods may require restatement. As a result of the investigation and pending restatements of its historical financial statements, the Company did not file Form 10-K for the period ending December 31, 2006, and filed a corresponding Form 12b-25 on March 16, 2007.

On March 2, 2007, management of the Company concluded, and the Audit Committee of the Company’s Board of Directors agreed, that the Company’s financial statements and

 
PART IV — OTHER INFORMATION

(1)

Name and telephone number of person to contact in regard to this notification

Gail S. Mann		(617)		613-6078
(Name)		(Area Code)		(Telephone Number)

(2)		Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s).
		Yes  o     No þ

(3)		Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?
		Yes þ     No o

		If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

As disclosed in Part III above, the full impact of the investigation on non-cash compensation charges and related tax impacts in the Company’s financial statements has not yet been determined. In addition, there will be charges during the quarter for the cost of the investigation. The Company does not anticipate being able to estimate the degree to which all of these charges may affect current period results as compared to the prior period’s results until the completion of its restatement analysis.

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