Mast Erle T Form 4 Receptos / ERLE T MAST ownership change

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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X

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^*

MAST ERLE T

(Last) (First) (Middle)

C/O RECEPTOS, INC.

3033 SCIENCE PARK ROAD, SUITE 300

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Receptos, Inc. [ RCPT ]

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)
08/25/2015

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/25/2015		U		300	D	(1)	7,400	D
Common Stock	08/27/2015		D		7,400	D	(1)	0	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$18.77	08/27/2015		D			18,800	(2)(3)	07/16/2023	Common Stock	18,800	$213.23(2)	0	D
Stock Option (right to buy)	$27.44	08/27/2015		D			9,400	(2)(4)	06/02/2024	Common Stock	9,400	$204.56(2)	0	D

Explanation of Responses:

1. Pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of July 14, 2015, by and among Receptos, Inc., a Delaware corporation (the "Company"), Celgene Corporation, a Delaware corporation ("Parent"), and Strix Corporation, a Delaware corporation and a wholly owned subsidiary of Parent, the reporting person disposed of 7,700 shares of the Company's common stock in the merger and Offer (as defined in the Merger Agreement) in exchange for $232.00 per share in cash (the "Offer Price") which number includes 7,400 unvested time-based restricted stock units.

2. Pursuant to the terms of the Merger Agreement, each stock option of the Company, whether vested or unvested, was cancelled in exchange for a cash payment with respect thereto equal to the product of (A) the excess, if any, of (1) the Offer Price over (2) the exercise price per share of such option, and (B) the number of shares of common stock underlying such option.

3. The original vesting term of the option was as follows: the option vested in 36 equal monthly installments commencing on July 17, 2013.

4. The original vesting term of the option was as follows: the option vested in 12 equal monthly installments commencing on June 3, 2014.

Remarks:

	/s/ Erle T. Mast, by Christian Waage, Attorney-in-Fact	08/27/2015
	** 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).
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