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^*

Nashat Amir

(Last)

(First)

(Middle)

C/O RECEPTOS, INC.

10835 ROAD TO THE CURE, SUITE 205

(Street)

SAN DIEGO

92121

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
05/08/2013

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

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

X	Director	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)

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)
Series B Preferred Stock	⁽¹⁾	⁽¹⁾	Common Stock	1,035,597	$7.73	I	See Footnotes⁽²⁾⁽³⁾

Explanation of Responses:

1. The Series B Preferred Stock has no expiration date and is convertible at any time at the option of the holder and will convert upon the closing of the Issuer's initial public offering at a conversion ratio of 1 share of Common Stock for every 7.5 shares of Series B Preferred Stock, for no additional consideration.

2. Beneficial ownership consists of: (i) an aggregate of 976,897 shares of common stock issuable upon conversion of shares of Series B preferred stock held by Polaris Venture Partners VI, L.P. ("Polaris Ventures"); and (ii) an aggregate of 58,700 shares of common stock issuable upon conversion of Series B preferred stock held by Polaris Venture Partners Founders' Fund VI, L.P. ("Polaris Fund"). The general partner of Polaris Ventures and Polaris Fund is Polaris Venture Management Co. VI, LLC ("Polaris Management"), and Polaris Management has sole voting and investment power over such shares. Polaris Management disclaims beneficial ownership of all such shares, except to the extent of any pecuniary interest therein. Dr. Nashat is one of six members of Polaris Management.

3. He has shared voting and investment power over such shares and may be deemed the indirect beneficial owner of such shares. Dr. Nashat disclaims beneficial ownership over such shares, except to the extent of any pecuniary interest therein. The members of North Star Venture Management 2010 LLC are also members of Polaris Management, and as members of the general partner, they may be deemed to share voting and investment power over such shares. The principles of North Star Venture Management 2010 LLC disclaim beneficial ownership of such shares, except to the extent of their proportionate pecuniary interest therein.

Remarks:

Exhibit List: Exhibit 24 - Power of Attorney

	/s/ Amir Nashat	05/08/2013
	** 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).
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