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*
McMahon Arthur

(Last) (First) (Middle)
C/O SYNTA PHARMACEUTICALS CORP.
45 HARTWELL AVENUE

(Street)
LEXINGTON MA 02421

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
01/03/2014
3. Issuer Name and Ticker or Trading Symbol
SYNTA PHARMACEUTICALS CORP [ SNTA ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
SVP, People Operations
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 12,829 D
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)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to Buy) (1) 02/06/2017 Common Stock 25,000 $10 D
Employee Stock Option (Right to Buy) (1) 02/26/2017 Common Stock 10,000 $8.75 D
Employee Stock Option (Right to Buy) (1) 02/27/2018 Common Stock 22,680 $8.82 D
Employee Stock Option (Right to Buy) (1) 04/13/2019 Common Stock 24,948 $2.49 D
Employee Stock Option (Right to Buy) (2) 03/01/2020 Common Stock 30,888 $4.02 D
Employee stock Option (Right to Buy) (3) 03/01/2021 Common Stock 33,904 $5.26 D
Employee Stock Option (Right to Buy) (4) 03/06/2022 Common Stock 40,848 $4.22 D
Employee Stock Option (Right to Buy) (5) 09/13/2022 Common Stock 15,000 $8.05 D
Employee Stock Option (Right to Buy) (6) 03/05/2023 Common Stock 44,312 $9.65 D
Explanation of Responses:
1. The option is fully vested and exercisable.
2. The option vested as to 25% of the shares on March 1, 2011 and as to an additional 6.25% of the shares each quarter thereafter.
3. The option vested as to 25% of the shares on March 1, 2012 and as to an additional 6.25% of the shares each quarter thereafter.
4. The option vested as to 25% of the shares on March 6, 2013 and as to an additional 6.25% of the shares each quarter thereafter.
5. The option vested as to 25% of the shares on September 13, 2013 and as to an additional 6.25% of the shares each quarter thereafter.
6. The option vests as to 25% of the shares on March 5, 2014 and as to an additional 6.25% of the shares each quarter thereafter
/s/ Garrett Winslow, Attorney-in-Fact 01/13/2014
** 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.