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 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

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * PEARSON PLC   2. Issuer Name and Ticker or Trading Symbol INTERACTIVE DATA CORP/MA/ [IDC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 80 STRAND,  3. Date of Earliest Transaction (Month/Day/Year) 01/06/2006 (Street) LONDON, X0 WC2R 0RL 4. If Amendment, Date Original Filed(Month/Day/Year) 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 Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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, par value $.01 per share 01/06/2006   P(1)   1,130,739 A $ 21.67 57,554,795 D (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	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.		SEC 1474 (9-02)

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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PEARSON PLC 80 STRAND LONDON, X0 WC2R 0RL		X
Pearson Overseas Holdings Ltd. 80 STRAND LONDON, X0 WC2R 0RL		X
Pearson Netherlands BV CONCERTGEBOUWPLEIN 25 AMSTERDAM, P7 1071 LM		X
PEARSON INC 1330 AVENUE OF THE AMERICAS 7TH FLOOR NEW YORK, NY 10019		X
Pearson Longman, Inc. C/O PEARSON INC 1330 AVENUE OF THE AMERICAS, 7TH FLOOR NEW YORK, NY 10019		X
Pearson DBC Holdings Inc. C/O PEARSON INC 1330 AVENUE OF THE AMERICAS, 7TH FLOOR NEW YORK, NY 10019		X

Signatures

Pearson plc, Philip Hoffman, Secretary		01/06/2006
**Signature of Reporting Person		Date
Pearson Overseas Holdings Ltd, Stephen Jones, Secretary		01/06/2006
**Signature of Reporting Person		Date
Pearson Netherlands B.V., Jan Francis van der Drift, Director		01/06/2006
**Signature of Reporting Person		Date
Pearson Inc., Pearson Longman, Inc., Pearson DBC Holdings Inc., Thomas Wharton, Vice President		01/06/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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)	Pursuant to a private stock sale and purchase transaction whereby Pearson DBC Holdings Inc. ("DBC Holdings") purchased 1,130,739 shares of common stock ("Common Stock") of the Issuer.
(2)	The Reporting Persons other than DBC Holdings may be deemed beneficial owners due their direct or indirect ownership of DBC Holdings. Such Reporting Persons disclaim beneficial ownership of these shares of Common Stock except to the extent of its pecuniary interest derived through its ownership interest in DBC Holdings.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.