Sec Form 4 Filing - Broeders Henk @ FORRESTER RESEARCH, INC. - 2017-08-31

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Broeders Henk 2. Issuer Name and Ticker or Trading Symbol FORRESTER RESEARCH, INC. [ FORR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O FORRESTER RESEARCH, INC., 60 ACORN PARK DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 08/31/2017 (Street) CAMBRIDGE, MA02140 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 08/31/2017 M 8,568 A $ 23.41 26,030 D Common Stock 08/31/2017 M 8,801 A $ 31.96 34,831 D Common Stock 08/31/2017 S 17,369 D $ 41 17,462 D Common Stock 09/01/2017 F 114 ( 1 ) D $ 40.6 17,348 D Common Stock 09/01/2017 M( 2 ) 2,661 A $ 0 20,009 D Common Stock 09/01/2017 F 397 ( 3 ) D $ 40.6 19,612 D Common Stock 09/05/2017 M 100 A $ 31.96 19,712 D Common Stock 09/05/2017 S 100 D $ 41 19,612 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Non-Qualified Stock Option (Right to Buy) $ 23.41 08/31/2017 M 8,568 05/12/2013 05/11/2019 common stock 8,568 $ 0 0 D Non-Qualified Stock Option (Right to Buy) $ 31.96 08/31/2017 M 8,801 05/11/2014 05/10/2020 common stock 8,801 $ 0 3,199 D Restricted Stock Units $ 0 ( 4 ) 09/01/2017 M 843 ( 5 ) ( 5 ) common stock 843 $ 0 ( 6 ) 0 D Restricted Stock Units $ 0 ( 4 ) 09/01/2017 M 926 ( 7 ) ( 7 ) common stock 926 $ 0 ( 6 ) 925 D Restricted Stock Units $ 0 ( 4 ) 09/01/2017 M 892 ( 8 ) ( 8 ) common stock 892 $ 0 ( 6 ) 1,784 D Non-Qualified Stock Option (Right to Buy) $ 31.96 09/05/2017 M 100 05/11/2014 05/10/2020 common stock 100 $ 0 3,099 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Broeders Henk C/O FORRESTER RESEARCH, INC. 60 ACORN PARK DRIVE CAMBRIDGE, MA02140 X Signatures Maite Garcia attorney-in-fact for Henk Broeders 09/05/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents shares withheld by the Issuer to satisfy tax withholding obligations upon the vesting on September 1, 2017 of the restricted stock units awarded to the reporting person on June 1, 2017. The award includes a provision for the withholding of shares by the Issuer to satisfy withholding taxes due as a result of the vesting of the award. ( 2 )Represents the conversion, upon vesting, of restricted stock units into common stock. ( 3 )Represents shares withheld by the Issuer to satisfy tax withholding obligations upon the vesting on September 1, 2017 of the restricted stock units awarded to the reporting person on May 1, 2014, May 12, 2015 and May 17, 2016. The award includes a provision for the withholding of shares by the Issuer to satisfy withholding taxes due as a result of the vesting of the award. ( 4 )Each Restricted Stock Unit represents the right to receive, following vesting, one share of Forrester Research, Inc. common stock. ( 5 )On May 13, 2014, the reporting person was granted 3374 RSUs, vesting in four equal annual installments beginning on the first anniversary of the grant date. Effective September 1, 2017, theCompensation and Nominating Committee accelerated the vesting of 843 RSUs in connection with the reporting person's resignation from the Company's board of directors. ( 6 )Each Restricted Stock Unit is the equivalent of one share of Forrester Research, Inc. common stock. ( 7 )On May 12, 2015, the reporting person was granted 3703 RSUs, vesting in four equal annual installments beginning on the first anniversary of the grant date. Effective September 1, 2017, the Compensation and Nominating Committee accelerated the vesting of 926 RSUs in connection with the reporting person's resignation from the Company's board of directors. ( 8 )On May 17, 2016, the reporting person was granted 3569 RSUs, vesting in four equal annual installments beginning on the first anniversary of the grant date. Effective September 1, 2017, the Compensation and Nominating Committee accelerated the vesting of 892 RSUs in connection with the reporting person's resignation from the Company's board of directors.

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