
CUSIP No. 78462K102		13G		Page 1 of 5 Pages

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 1) (*)

SPSS Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

78462K102

(CUSIP Number)

December 31, 2008

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

x Rule 13d-1(b)

¨ Rule 13d-1(c)

¨ Rule 13d-1(d)

(*)	The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No. 78462K102		13G		Page 2 of 5 Pages


1		NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Ellington Management Group, L.L.C.
2		CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) ¨ (b) ¨
3		SEC USE ONLY
4		CITIZENSHIP OR PLACE OF ORGANIZATION Delaware


NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5 SOLE VOTING POWER 0
		6 SHARED VOTING POWER
		7 SOLE DISPOSITIVE POWER 0
		8 SHARED DISPOSITIVE POWER


9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)	¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IA

Page 2 of 5 Pages


CUSIP No. 78462K102		13G		Page 3 of 5 Pages

Schedule 13G

Item 1

(a).

Name of Issuer:

SPSS Inc.

Item 1

(b).

Address of Issuer’s Principal Executive Offices:

233 S. Wacker Drive, Chicago, IL 60606

Item 2

(a).

Name of Persons Filing:

Ellington Management Group, L.L.C.

Item 2

(b).

Address of Principal Business Office or, if None, Residence:

53 Forest Avenue, Suite 301, Old Greenwich, CT, 06870

Item 2

(c).

Citizenship:

Delaware

Item 2

(d).

Title of Class of Securities:

Common Stock, par value $0.01 per share (the “Common Stock”)

Item 2

(e).

CUSIP Number:

78462K102

Item 3.

If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:

(a)

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8).

(e)

An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)

An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Page 3 of 5 Pages


CUSIP No. 78462K102		13G		Page 4 of 5 Pages


Item 4.	Ownership.

	(a)	Amount beneficially owned:

		0

	(b)	Percent of class:

		0%

	(c)	Number of shares as to which the person has:

		(i)	Sole power to vote or to direct the vote:

			0

		(ii)	Shared power to vote or to direct the vote:



		(iii)	Sole power to dispose or to direct the disposition of:

			0

		(iv)	Shared power to dispose or to direct the disposition of:



Item 5.	Ownership of Five Percent or Less of a Class.

	Not Applicable.

Item 6.	Ownership of More than Five Percent on Behalf of Another Person.

	Not Applicable.

Item 7.	Identification and Classification of the Subsidiary which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.

	Not Applicable.

Item 8.	Identification and Classification of Members of the Group.

	Not Applicable.

Item 9.	Notice of Dissolution of Group.

	Not Applicable.

Item 10.	Certification.

	By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Page 4 of 5 Pages


CUSIP No. 78462K102		13G		Page 5 of 5 Pages

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: September 17, 2010


Ellington Management Group, L.L.C.

/s/ David Rice
Name:		David Rice
Title:		Chief Compliance Officer

Page 5 of 5 Pages

SPSS INC SC 13G/A