UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 4, 2009

thinkorswim Group Inc.

(Exact Name of registrant as specified in its charter)

Delaware	000-52012	76-0685039
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

45 Rockefeller Plaza, Suite 2012, New York, NY		10111
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (801) 816-6918

Not applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Table of Contents

8-K
Item 2.02	Results of Operations and Financial Condition
Item 9.01	Financial Statements and Exhibits
Signatures
EX-99.1	(EX99-1)

Table of Contents

Item 2.02. Results of Operations and Financial Condition.

On March 4, 2009, thinkorswim Group Inc. (the “Company”) issued a press release announcing its financial results for the year ended December 31, 2008. A copy of the press release is furnished as Exhibit 99.1. to this report and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d)

Exhibits

Exhibit Number		Exhibit Title
99.1		Press Release issued on March 4, 2009

Table of Contents

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: March 6, 2009	thinkorswim Group Inc.

		By:	/s/ Ida K. Kane
			Ida K. Kane
			Senior Vice President and
			Chief Financial Officer

THINKORSWIM GROUP INC. 8-K