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 * POLSKY LISA   2. Issuer Name and Ticker or Trading Symbol THINKORSWIM GROUP INC. [SWIM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 13947 S. MINUTEMAN DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 06/11/2009 (Street) DRAPER, UT 84020 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ 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 06/11/2009   D   20,550 (3) D (3) 0 D

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

Stock Options

$ 16.8

06/11/2009

D

1,550

(1)(4)

02/21/2017

Common Stock

1,550

(5)

0

D

Stock Option

$ 13.72

06/11/2009

D

2,000

(2)(4)

01/17/2018

Common Stock

2,000

(5)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
POLSKY LISA 13947 S. MINUTEMAN DRIVE DRAPER, UT 84020	X

Signatures

/s/ LISA POLSKY		06/11/2009
**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)	Options were exercisable in four equal installments beginning one year from date of grant. Date of grant was 02/21/07.
(2)	Options were exercisable in four equal installments beginning one year from date of grant. Date of grant was 01/18/08.
(3)	Disposed of pursuant to the terms of the Agreement and Plan of Merger dated as of January 8, 2009 (the "Merger Agreement"), by and among TD AMERITRADE Holding Corporation, a Delaware corporation ("TD AMERITRADE"), Tango Acquisition Corporation One, a Delaware corporation and a direct, wholly-owned subsidiary of TD AMERITRADE, Tango Acquisition Corporation Two, a Delaware corporation and a direct, wholly-owned subsidiary of TD AMERITRADE, and the Issuer. Shares of Common Stock of the Issuer held outright (i.e., not subject to restrictions or which does not cease to be subject to restrictions as of the closing of the transactions contemplated by the Merger Agreement) shall be cancelled in exchange for $3.34 in cash, without interest and less any applicable withholding, and 0.3980 of a share of TD AMERITRADE common stock, which had a volume-weighted exercise price on the day prior to the date of closing equal to $17.99.
(4)	All outstanding options were assumed by TD AMERITRADE pursuant to the Merger Agreement.
(5)	Per Instruction 4 (c)(iii), this column is to be left blank.

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.