SC 13G

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

SCHEDULE 13G

(Rule 13d-102)

Information Statement Pursuant to Rules 13d-1 and 13d-2

Under the Securities Exchange Act of 1934

(Amendment No.   )*

InfoSpace, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

45678T201

(CUSIP Number)

December 31, 2008

Date of Event Which Requires Filing of the Statement

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

T           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 disclosures provided in a prior cover page.

The information required on 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. 45678T201 13G Page 2 of 13

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON PEAK6 LLC
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a) £ (b) T
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 1,876,625 shares
	7.	SOLE DISPOSITIVE POWER 0
	8.	SHARED DISPOSITIVE POWER 1,876,625 shares

9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,876,625 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.4% as of December 31, 2008 (based on 34,573,674 shares of Common Stock outstanding as of October 31, 2008, per Form 10-Q dated November 7, 2008)
12.	TYPE OF REPORTING PERSON OO/HC

Page 2 of 12

Cusip No. 45678T201 13G Page 3 of 13

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON PEAK6 Investments, L.P.
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a) £ (b) T
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 1,876,625 shares
	7.	SOLE DISPOSITIVE POWER 0
	8.	SHARED DISPOSITIVE POWER 1,876,625 shares

9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,876,625 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.4% as of December 31, 2008 (based on 34,573,674 shares of Common Stock outstanding as of October 31, 2008, per Form 10-Q dated November 7, 2008)
12.	TYPE OF REPORTING PERSON PN/HC

Page 3 of 12

Cusip No. 45678T201 13G Page 4 of 13

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON PEAK6 Advisors LLC
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a) £ (b) T
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 1,825,525 shares
	7.	SOLE DISPOSITIVE POWER 0
	8.	SHARED DISPOSITIVE POWER 1,825,525 shares

9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,825,525 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.3% as of December 31, 2008 (based on 34,573,674 shares of Common Stock outstanding as of October 31, 2008, per Form 10-Q dated November 7, 2008)
12.	TYPE OF REPORTING PERSON IA

Page 4 of 12

Cusip No. 45678T201 13G Page 5 of 13

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON PEAK6 Performance Management LLC
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a) £ (b) T
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 1,825,525 shares
	7.	SOLE DISPOSITIVE POWER 0
	8.	SHARED DISPOSITIVE POWER 1,825,525 shares

9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,825,525 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.3% as of December 31, 2008 (based on 34,573,674 shares of Common Stock outstanding as of October 31, 2008, per Form 10-Q dated November 7, 2008)
12.	TYPE OF REPORTING PERSON BD/OO

Page 5 of 12

Cusip No. 45678T201 13G Page 6 of 13

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Matthew N. Hulsizer
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a) £ (b) T
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION U.S.

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5.	SOLE VOTING POWER 0
	6.	SHARED VOTING POWER 1,876,625 shares
	7.	SOLE DISPOSITIVE POWER 0
	8.	SHARED DISPOSITIVE POWER 1,876,625 shares

9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,876,625 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.4% as of December 31, 2008 (based on 34,573,674 shares of Common Stock outstanding as of October 31, 2008, per Form 10-Q dated November 7, 2008)
12.	TYPE OF REPORTING PERSON IN/HC

Page 6 of 12

Cusip No. 45678T201 13G Page 7 of 13

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Jennifer Just
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a) £ (b) T
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION U.S.

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5.	SOLE VOTING POWER 0
	6.	SHARED VOTING POWER 1,876,625 shares
	7.	SOLE DISPOSITIVE POWER 0
	8.	SHARED DISPOSITIVE POWER 1,876,625 shares

9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,876,625 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.4% as of December 31, 2008 (based on 34,573,674 shares of Common Stock outstanding as of October 31, 2008, per Form 10-Q dated November 7, 2008)
12.	TYPE OF REPORTING PERSON IN/HC

Page 7 of 12

Cusip No. 45678T201 13G Page 8 of 13

Item 1(a)  Name of Issuer:   InfoSpace, Inc.

Item 1(b) Address of Issuer’s Principal Executive Offices:

601 108th Avenue N.E., Suite 1200

Bellevue, Washington 98004

Item 2(a) Name of Person Filing

Item 2(b) Address of Principal Business Office

Item 2(c) Citizenship

PEAK6 LLC

141 W. Jackson Boulevard, Suite 500

Chicago, IL  60604

Delaware Limited Liability Company

PEAK6 Investments, L.P.

141 W. Jackson Boulevard, Suite 500

Chicago, IL  60604

Delaware Limited Partnership

PEAK6 Advisors LLC

141 W. Jackson Boulevard, Suite 500

Chicago, IL  60604

Delaware Limited Liability Company

PEAK6 Performance Management LLC

141 W. Jackson Boulevard, Suite 500

Chicago, IL  60604

Delaware Limited Liability Company

Matthew N. Hulsizer

141 W. Jackson Boulevard, Suite 500

Chicago, IL  60604

U.S. Citizen

Jennifer Just

141 W. Jackson Boulevard, Suite 500

Chicago, IL  60604

U.S. Citizen

2(d) Title of Class of Securities:

Common Stock

2(e) CUSIP Number: 45678T20

Page 8 of 12

Cusip No. 45678T201 13G Page 9 of 13

Item 3 If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:

(a) T Broker or dealer registered under Section 15 of the Exchange Act;

(b) £ Bank as defined in Section 3(a)(6) of the Exchange Act;

(c) £ Insurance company as defined in Section 3(a)(19) of the Exchange Act;

(d) £ Investment company registered under Section 8 of the Investment Company Act;

(e) x An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);

(f) £ An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);

(g) T A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);

(h) £ A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;

(i) £ A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act;

(j) £ Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

If this statement is filed pursuant to Rule 13d-1(c), check this box.  o

Item 4 Ownership:

(a) Amount beneficially owned:

Incorporated by reference to Item 9 of the cover page pertaining to each reporting person.

(b) Percent of Class:

Incorporated by reference to Item 11 of the cover page pertaining to each reporting person.

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

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

Incorporated by reference to Item 5 of the cover page pertaining to each reporting person.

Page 9 of 12

Cusip No. 45678T201 13G Page 10 of 13

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

Incorporated by reference to Item 6 of the cover page pertaining to each reporting person.

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

Incorporated by reference to Item 7 of the cover page pertaining to each reporting person.

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

Incorporated by reference to Item 8 of the cover page pertaining to each reporting person.

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:

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 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 10 of 12

Cusip No. 45678T201 13G Page 11 of 13

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

Dated this 11th day of February, 2009

PEAK6 LLC
By:	/s/ Matthew N. Hulsizer
	Matthew N. Hulsizer
	Managing Member
PEAK6 INVESTMENTS, L.P.
By:	/s/ Matthew N. Hulsizer
	Matthew N. Hulsizer
	Managing Member of PEAK6 LLC, the General Partner of PEAK6 Investments, L.P.
PEAK6 ADVISORS LLC
By:	/s/ Matthew N. Hulsizer
	Matthew N. Hulsizer
	Managing Member of PEAK6 LLC, the General Partner of the managing member of PEAK6 Advisors LLC
PEAK6 PERFORMANCE MANAGEMENT LLC
By:	/s/ Matthew N. Hulsizer
	Matthew N. Hulsizer
	Managing Member of PEAK6 LLC, the General Partner of the managing member of PEAK6 Performance Management LLC
/s/	Matthew N. Hulsizer
	Matthew N. Hulsizer
/s/	Jennifer Just
	Jennifer Just

Page 11 of 12

Cusip No. 45678T201 13G Page 12 of 13

INDEX TO EXHIBITS

Exhibit No.	Exhibit
99.1	Joint Filing Agreement

Page 12 of 12

EX-99.1

Cusip No. 45678T201 13G Page 13 of 13

EXHIBIT 99.1

FEBRUARY 11, 2009

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, PEAK6 LLC, PEAK6 Investments, L.P., PEAK6 Advisors LLC, PEAK6 Performance Management LLC, Matthew N. Hulsizer and Jennifer Just, each hereby agree to the joint filing of this statement on Schedule 13G (including any and all amendments hereto).  In addition, each party to this Agreement expressly authorizes each other party to this Agreement to file on its behalf any and all amendments to such Statement on Schedule 13G. A copy of this Agreement shall be attached as an exhibit to the Statement on Schedule 13G filed on behalf of each of the parties hereto, to which this Agreement relates.

This Agreement may be executed in multiple counterparts, each of which shall constitute an original, one and the same instrument.

PEAK6 LLC
By:	/s/ Matthew N. Hulsizer
	Matthew N. Hulsizer
	Managing Member
PEAK6 INVESTMENTS, L.P.
By:	/s/ Matthew N. Hulsizer
	Matthew N. Hulsizer
	Managing Member of PEAK6 LLC, the General Partner of PEAK6 Investments, L.P.
PEAK6 ADVISORS LLC
By:	/s/ Matthew N. Hulsizer
	Matthew N. Hulsizer
	Managing Member of PEAK6 LLC, the General Partner of the managing member of PEAK6 Advisors LLC
PEAK6 PERFORMANCE MANAGEMENT LLC
By:	/s/ Matthew N. Hulsizer
	Matthew N. Hulsizer
	Managing Member of PEAK6 LLC, the General Partner of the managing member of PEAK6 Performance Management LLC
/s/	Matthew N. Hulsizer
	Matthew N. Hulsizer
/s/	Jennifer Just
	Jennifer Just