Sec Form 13G Filing - Chen Lan Bo filing for MADRIGAL PHARMACEUTICALS INC. (MDGL) - 2013-02-14

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

o

Rule 13d-1(b)

o

Rule 13d-1(c)

x

Rule 13d-1(d)

CUSIP No. 87162T 20 6

1.

Names of Reporting Persons
Lan Bo Chen

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3.

SEC Use Only

4.

Citizenship or Place of Organization
United States

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
2,387,284

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
2,387,284

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
2,387,284

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
3.9% (based on 61,900,896 shares outstanding on September 30, 2012).

12.

Type of Reporting Person (See Instructions)
IN

CUSIP No. 87162T 20 6

1.

Names of Reporting Persons
Lin-Huey Chen

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3.

SEC Use Only

4.

Citizenship or Place of Organization
United States

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
2,387,284

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
2,387,284

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
2,387,284

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
3.9% (based on 61,900,896 shares outstanding on September 30, 2012).

12.

Type of Reporting Person (See Instructions)
IN

Item 1.

(a)

Name of Issuer
Synta Pharmaceuticals Corp.

(b)

Address of Issuer’s Principal Executive Offices
45 Hartwell Avenue

 Lexington, MA 02421

Item 2.

(a)

Name of Person Filing
(i)  Lan Bo Chen

(ii)  Lin-Huey Chen

(b)

Address of Principal Business Office or, if none, Residence
(i) 184 East Emerson Road

      Lexington, MA 02420

(ii) 184 East Emerson Road

      Lexington, MA 02420

(c)

Citizenship
(i) United States

(ii) United States

(d)

Title of Class of Securities
Common Stock, par value $0.0001 per share

(e)

CUSIP Number
87162T 20 6

Item 3.

If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

o

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

(b)

o

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

(c)

o

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

(d)

o

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

(e)

o

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

(f)

o

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

(g)

o

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

(h)

o

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

(i)

o

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)

o

A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J);

(k)

o

Group, in accordance with § 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J), please specify the type of institution:

Item 4.

Ownership

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(i) Lan Bo Chen

(a)

Amount beneficially owned:   

2,387,284 shares. Consists of 680,641 shares of common stock owned of record by Dr. Lan Bo Chen; 142,223 shares of common stock owned of record by LAJ Holdings LLC, the manager of which is Dr. Chen’s spouse, Lin-Huey Chen, and of which Dr. Chen disclaims beneficial ownership except to the extent of any pecuniary interest therein; 660,308 shares of common stock owned of record by the Wisteria Trust, the trustee of which is Dr. Chen’s spouse, and of which Dr. Chen disclaims beneficial ownership except to the extent of any pecuniary interest therein; 99,394 shares of common stock owned of record by the Lan Bo Chen 2009 GRAT, of which Dr. Chen is the trustee; 621,223 shares of common stock owned of record by the Lin-Huey Chen 2009 GRAT, of which Dr. Chen’s spouse is the trustee; and 183,495 shares of common stock owned of record by the Lin-Huey Chen 2010 GRAT, of which Dr. Chen’s spouse is the trustee.

(b)

Percent of class:   

3.9% (based on 61,900,896 shares outstanding on September 30, 2012).

(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    

2,387,284

(iii)

Sole power to dispose or to direct the disposition of   

0

(iv)

Shared power to dispose or to direct the disposition of   

2,387,284

(ii) Lin-Huey Chen

(a)

Amount beneficially owned:  

2,387,284 shares. Consists of 680,641 shares of common stock owned of record by Mrs. Chen’s spouse, Dr. Lan Bo Chen; 142,223 shares of common stock owned of record by LAJ Holdings LLC, of which Mrs. Chen is the manager, and of which Mrs. Chen disclaims beneficial ownership except to the extent of any pecuniary interest therein; 660,308 shares of common stock owned of record by the Wisteria Trust, of which Mrs. Chen is the trustee; 99,394 shares of common stock owned of record by the Lan Bo Chen 2009 GRAT, of which Mrs. Chen’s spouse is the trustee; 621,223 shares of common stock owned of record by the Lin-Huey Chen 2009 GRAT, of which Mrs. Chen is the trustee; and 183,495 shares of common stock owned of record by the Lin-Huey Chen 2010 GRAT, of which Mrs. Chen is the trustee.

(b)

Percent of class:    

3.9% (based on 61,900,896 shares outstanding on September 30, 2012).

(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   

2,387,284

(iii)

Sole power to dispose or to direct the disposition of  

0

(iv)

Shared power to dispose or to direct the disposition of  

2,387,284

Item 5.

Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following   x.

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

Not Applicable

Date:  February 14, 2013

/s/ Lan Bo Chen

Lan Bo Chen

Date:  February 14, 2013

/s/ Lin-Huey Chen

Lin-Huey Chen