SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Chen Lan Bo

(Last)

(First)

(Middle)

184 EAST EMERSON ROAD

(Street)

LEXINGTON

02420

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
02/05/2007

3. Issuer Name and Ticker or Trading Symbol
SYNTA PHARMACEUTICALS CORP [ SNTA ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

5. If Amendment, Date of 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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	742,024⁽¹⁾	D
Common Stock	55,071⁽¹⁾	I	By Lan Bo Chen 2004 GRAT⁽²⁾⁽³⁾
Common Stock	2,513,674⁽¹⁾	I	By trust⁽⁴⁾⁽³⁾
Common Stock	142,223⁽¹⁾	I	By LAJ Holdings LLC⁽⁵⁾⁽³⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)

Explanation of Responses:

1. Reflects a 1-for-4 reverse stock split effected on February 2, 2007 in connection with the Issuer's initial public offering, pursuant to which the number of shares of Common Stock was divided by 4.

2. These shares are owned directly by the Lan Bo Chen 2004 GRAT and indirectly by the Reporting Person as the granter.

3. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of the beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

4. Of these shares, 2,004,016 are owned directly by the Wisteria Trust and indirectly by the Reporting Person as the husband of the trustee and beneficiary; 243,481 are owned directly by the Ann Chen Trust and indirectly by the Reporting Person as the husband of a trustee and the father of the beneficiary; 243,481 are owned directly by the Jane Chen Trust and indirectly by the Reporting Person as the husband of a trustee and the father of the beneficiary; 12,946 are owned directly by the Chen Grandchildren's Trust and indirectly by the Reporting Person as the husband of a trustee and the grandfather of the beneficiaries; 6,950 are owned directly by the Alexander Chen Wu 2002 Irrevocable Trust and indirectly by the Reporting Person as the husband of a trustee and the grandfather of the beneficiary; and 2,800 are owned directly by the Allison Chen Wu 2004 Irrevocable Trust and indrectly by the Reporting Person as the husband of a trustee and the grandfather of the beneficiary.

5. These shares are owned directly by LAJ Holdings LLC and indirectly by the Reporting Person as a co-manager of LAJ Holdings LLC.

	/s/ Ann Margaret Eames, Attorney-in-Fact	02/05/2007
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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 Number.