Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
  ACCEL VII LP
2. Date of Event Requiring Statement (Month/Day/Year)
06/26/2007
3. Issuer Name and Ticker or Trading Symbol
COMSCORE, INC. [SCOR]
(Last)
(First)
(Middle)
C/O ACCEL PARTNERS, 428 UNIVERSITY AVENUE
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PALO ALTO, CA 94301
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Series A Convertible Preferred Stock   (1)   (1) Common Stock 668,693 $ (1) D (2)  
Series B Convertible Preferred Stock   (1)   (1) Common Stock 72,779 $ (1) D (2)  
Series C Convertible Preferred Stock   (1)   (1) Common Stock 384,982 $ (1) D (2)  
Series D Convertible Preferred Stock   (1)   (1) Common Stock 809,207 $ (1) D (2)  
Series E Convertible Preferred Stock   (1)   (1) Common Stock 1,883,002 $ (1) D (2)  
Series A Convertible Preferred Stock   (1)   (1) Common Stock 167,174 $ (1) I (3) Held by Accel Internet Fund III L.P.
Series B Convertible Preferred Stock   (1)   (1) Common Stock 18,196 $ (1) I (3) Held by Accel Internet Fund III L.P.
Series C Convertible Preferred Stock   (1)   (1) Common Stock 96,246 $ (1) I (3) Held by Accel Internet Fund III L.P.
Series D Convertible Preferred Stock   (1)   (1) Common Stock 202,302 $ (1) I (3) Held by Accel Internet Fund III L.P.
Series E Convertible Preferred Stock   (1)   (1) Common Stock 470,751 $ (1) I (3) Held by Accel Internet Fund III L.P.
Series A Convertible Preferred Stock   (1)   (1) Common Stock 82,669 $ (1) I (4) Held by Accel Investors '99 L.P.
Series B Convertible Preferred Stock   (1)   (1) Common Stock 8,998 $ (1) I (4) Held by Accel Investors '99 L.P.
Series C Convertible Preferred Stock   (1)   (1) Common Stock 47,594 $ (1) I (4) Held by Accel Investors '99 L.P.
Series D Convertible Preferred Stock   (1)   (1) Common Stock 100,040 $ (1) I (4) Held by Accel Investors '99 L.P.
Series E Convertible Preferred Stock   (1)   (1) Common Stock 232,789 $ (1) I (4) Held by Accel Investors '99 L.P.

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
ACCEL VII LP
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    
ACCEL VII ASSOCIATES LLC
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    
ACCEL INTERNET FUND III LP
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    
ACCEL INTERNET FUND III ASSOCIATES LLC
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    
ACCEL INVESTORS 99 LP
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    
BREYER JAMES
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    
PATTERSON ARTHUR C
C/O ACCEL PARTNERS
428 UNIVERSITY AVE
PALO ALTO, CA 94301
    X    
GOUW RANZETTA THERESIA
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    
SWARTZ JAMES R
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    
WAGNER J PETER
C/O ACCEL PARTNERS
428 UNIVERSITY AVENUE
PALO ALTO, CA 94301
    X    

Signatures

Tracy L. Sedlock, as Attorney in Fact for the Reporting Persons 06/26/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The convertible preferred stock is convertible immediately into Issuer's common stock and has no expiration date.
(2) Shares are directly owned by Accel VII L.P. Accel VII Associates L.L.C. is the General Partner of Accel VII L.P. and has the sole voting and investment power. James W. Breyer, Arthur C. Patterson, Theresia Gouw Ranzetta, James R. Swartz, and J. Peter Wagner are the Managing Members of Accel VII Associates L.L.C. and share such powers. Each such person disclaims beneficial ownership except to the extent of his pecuniary interest therein.
(3) Shares are directly owned by Accel Internet Fund III L.P. Accel Internet Fund III Associates L.L.C. is the General Partner of Accel Internet Fund III L.P. and has the sole voting and investment power. James W. Breyer, Arthur C. Patterson, Theresia Gouw Ranzetta, James R. Swartz, and J. Peter Wagner are the Managing Members of Accel Internet Fund III Associates L.L.C. and share such powers. Each such person disclaims beneficial ownership except to the extent of his pecuniary interest therein.
(4) Shares are directly owned by Accel Investors '99 L.P. James W. Breyer, Arthur C. Patterson, Theresia Gouw Ranzetta, James R. Swartz, and J. Peter Wagner are the General Partners of Accel Investors '99 L.P. and share voting and investment power. Each such person disclaims beneficial ownership except to the extent of his pecuniary interest therein.

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