SEC FORM 4

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Soeters Martinus Hermanus

(Last)

(First)

(Middle)

65 HAYDEN AVENUE

(Street)

LEXINGTON

02421

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
CUBIST PHARMACEUTICALS INC [ CBST ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
06/03/2014

4. 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 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/03/2014		M		1,104	A	$0	10,397	D

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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Options (Right to Buy)	$66.68	06/03/2014		A		6,202⁽¹⁾		06/03/2015⁽²⁾	06/03/2024	Common Stock	6,202	$0	6,202	D
Restricted Stock Units	$0⁽³⁾	06/03/2014		A		1,687⁽⁴⁾		06/03/2015⁽⁵⁾	⁽⁶⁾	Common Stock	1,687	$0	1,687	D
Restricted Stock Units	⁽³⁾	06/03/2014		M			1,104	06/03/2014⁽⁷⁾	⁽⁷⁾	Common Stock	1,104	$0	0	D

Explanation of Responses:

1. The number of stock options is equal to the fair value of $112,500 calculated using the Black-Scholes option-pricing model in accordance with ASC Topic 718.

2. Options vest 100% on the earlier of the first anniversary of the grant date or the date of the Company's 2015 Annual Meeting of Stockholders.

3. Each restricted stock unit represents a contingent right to receive one share of Cubist common stock for no consideration.

4. The number of restricted stock units is equal to the fair value of $112,500 calculated using the Black-Scholes option-pricing model in accordance with ASC Topic 718.

5. The restricted stock units vest 100% on the earlier of the first anniversary of the grant date or the date of the Company's 2015 Annual Meeting of Stockholders.

6. The restricted stock units vest 100% on the earlier of the first anniversary of the grant date or the date of the Company's 2015 Annual Meeting of Stockholders.

7. The restricted stock units vest 100% on the earlier of the first anniversary of the grant date or the date of the Company's 2014 Annual Meeting of Stockholders.

	/s/ Joseph L. Farmer - Attorney in fact	06/05/2014
	** 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 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).
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