Venrock Associates V SC 13G Receptos, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACTOF 1934

(Amendment No.     )*

RECEPTOS, INC.

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

756207106

(CUSIP Number)

December 31, 2013

(Date of Event Which Requires Filing of This Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

¨ Rule 13d-1(b)

¨ Rule 13d-1(c)

x Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 756207106 Page 2 of 13

1.	Name of Reporting Persons Venrock Partners V, L.P.
2.	Check the Appropriate Box if a Member of a Group (See Instructions) (a)  x1         (b)  ¨
3.	SEC USE ONLY
4.	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person With:		5.	Sole Voting Power 0
		6.	Shared Voting Power 1,332,7612
		7.	Sole Dispositive Power 0
		8.	Shared Dispositive Power 1,332,7612
9.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,332,7612
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9) 7.3%3
12.	Type of Reporting Person (See Instructions) PN

¹  Venrock Partners V, L.P., Venrock Associates V, L.P., Venrock Entrepreneurs Fund V, L.P., Venrock Partners Management V, LLC (the general partner of Venrock Partners V, L.P.), Venrock Management V, LLC (the general partner of Venrock Associates V, L.P.) and VEF Management V, LLC (the general partner of Venrock Entrepreneurs Fund V, L.P.) are members of a group for purposes of this Schedule 13G.

²  Consists of 101,955 shares of common stock owned by Venrock Partners V, L.P., 1,202,553 shares of common stock owned by Venrock Associates V, L.P., and 28,253 shares of common stock owned by Venrock Entrepreneurs Fund V, L.P.

³  This percentage is calculated based upon 18,349,602 shares of the Issuer’s common stock outstanding as of December 31, 2013, as set forth in the Issuer’s prospectus filed pursuant to Rule 424(b)(4), filed with the Securities and Exchange Commission on January 9, 2014.

CUSIP No. 756207106 Page 3 of 13

1.	Name of Reporting Persons Venrock Associates V, L.P.
2.	Check the Appropriate Box if a Member of a Group (See Instructions) (a)  x1         (b)  ¨
3.	SEC USE ONLY
4.	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person With:		5.	Sole Voting Power 0
		6.	Shared Voting Power 1,332,7612
		7.	Sole Dispositive Power 0
		8.	Shared Dispositive Power 1,332,7612
9.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,332,7612
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  ¨
11.	Percent of Class Represented by Amount in Row (9) 7.3%3
12.	Type of Reporting Person (See Instructions) PN

¹  Venrock Partners V, L.P., Venrock Associates V, L.P., Venrock Entrepreneurs Fund V, L.P., Venrock Partners Management V, LLC (the general partner of Venrock Partners V, L.P.), Venrock Management V, LLC (the general partner of Venrock Associates V, L.P.) and VEF Management V, LLC (the general partner of Venrock Entrepreneurs Fund V, L.P.) are members of a group for purposes of this Schedule 13G.

²  Consists of 101,955 shares of common stock owned by Venrock Partners V, L.P., 1,202,553 shares of common stock owned by Venrock Associates V, L.P., and 28,253 shares of common stock owned by Venrock Entrepreneurs Fund V, L.P.

³  This percentage is calculated based upon 18,349,602 shares of the Issuer’s common stock outstanding as of December 31, 2013, as set forth in the Issuer’s prospectus filed pursuant to Rule 424(b)(4), filed with the Securities and Exchange Commission on January 9, 2014.

CUSIP No. 756207106 Page 4 of 13

1.	Name of Reporting Persons Venrock Entrepreneurs Fund V, L.P.
2.	Check the Appropriate Box if a Member of a Group (See Instructions) (a)  x1         (b)  ¨
3.	SEC USE ONLY
4.	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person With:		5.	Sole Voting Power 0
		6.	Shared Voting Power 1,332,7612
		7.	Sole Dispositive Power 0
		8.	Shared Dispositive Power 1,332,7612
9.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,332,7612
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  ¨
11.	Percent of Class Represented by Amount in Row (9) 7.3%3
12.	Type of Reporting Person (See Instructions) PN

¹  Venrock Partners V, L.P., Venrock Associates V, L.P., Venrock Entrepreneurs Fund V, L.P., Venrock Partners Management V, LLC (the general partner of Venrock Partners V, L.P.), Venrock Management V, LLC (the general partner of Venrock Associates V, L.P.) and VEF Management V, LLC (the general partner of Venrock Entrepreneurs Fund V, L.P.) are members of a group for purposes of this Schedule 13G.

²  Consists of 101,955 shares of common stock owned by Venrock Partners V, L.P., 1,202,553 shares of common stock owned by Venrock Associates V, L.P., and 28,253 shares of common stock owned by Venrock Entrepreneurs Fund V, L.P.

³  This percentage is calculated based upon 18,349,602 shares of the Issuer’s common stock outstanding as of December 31, 2013, as set forth in the Issuer’s prospectus filed pursuant to Rule 424(b)(4), filed with the Securities and Exchange Commission on January 9, 2014.

CUSIP No. 756207106 Page 5 of 13

1.	Name of Reporting Persons Venrock Partners Management V, LLC
2.	Check the Appropriate Box if a Member of a Group (See Instructions) (a)  x1         (b)  ¨
3.	SEC USE ONLY
4.	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person With:		5.	Sole Voting Power 0
		6.	Shared Voting Power 1,332,7612
		7.	Sole Dispositive Power 0
		8.	Shared Dispositive Power 1,332,7612
9.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,332,7612
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9) 7.3%3
12.	Type of Reporting Person (See Instructions) OO

¹  Venrock Partners V, L.P., Venrock Associates V, L.P., Venrock Entrepreneurs Fund V, L.P., Venrock Partners Management V, LLC (the general partner of Venrock Partners V, L.P.), Venrock Management V, LLC (the general partner of Venrock Associates V, L.P.) and VEF Management V, LLC (the general partner of Venrock Entrepreneurs Fund V, L.P.) are members of a group for purposes of this Schedule 13G.

²  Consists of 101,955 shares of common stock owned by Venrock Partners V, L.P., 1,202,553 shares of common stock owned by Venrock Associates V, L.P., and 28,253 shares of common stock owned by Venrock Entrepreneurs Fund V, L.P.

³  This percentage is calculated based upon 18,349,602 shares of the Issuer’s common stock outstanding as of December 31, 2013, as set forth in the Issuer’s prospectus filed pursuant to Rule 424(b)(4), filed with the Securities and Exchange Commission on January 9, 2014.

CUSIP No. 756207106 Page 6 of 13

1.	Name of Reporting Persons Venrock Management V, LLC
2.	Check the Appropriate Box if a Member of a Group (See Instructions) (a)  x1         (b)  ¨
3.	SEC USE ONLY
4.	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person With:		5.	Sole Voting Power 0
		6.	Shared Voting Power 1,332,7612
		7.	Sole Dispositive Power 0
		8.	Shared Dispositive Power 1,332,7612
9.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,332,7612
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9) 7.3%3
12.	Type of Reporting Person (See Instructions) OO

¹  Venrock Partners V, L.P., Venrock Associates V, L.P., Venrock Entrepreneurs Fund V, L.P., Venrock Partners Management V, LLC (the general partner of Venrock Partners V, L.P.), Venrock Management V, LLC (the general partner of Venrock Associates V, L.P.) and VEF Management V, LLC (the general partner of Venrock Entrepreneurs Fund V, L.P.) are members of a group for purposes of this Schedule 13G.

²  Consists of 101,955 shares of common stock owned by Venrock Partners V, L.P., 1,202,553 shares of common stock owned by Venrock Associates V, L.P., and 28,253 shares of common stock owned by Venrock Entrepreneurs Fund V, L.P.

³  This percentage is calculated based upon 18,349,602 shares of the Issuer’s common stock outstanding as of December 31, 2013, as set forth in the Issuer’s prospectus filed pursuant to Rule 424(b)(4), filed with the Securities and Exchange Commission on January 9, 2014.

CUSIP No. 756207106 Page 7 of 13

1.	Name of Reporting Persons VEF Management V, LLC
2.	Check the Appropriate Box if a Member of a Group (See Instructions) (a)  x1         (b)  ¨
3.	SEC USE ONLY
4.	Citizenship or Place of Organization Delaware
Number of Shares Beneficially Owned by Each Reporting Person With:		5.	Sole Voting Power 0
		6.	Shared Voting Power 1,332,7612
		7.	Sole Dispositive Power 0
		8.	Shared Dispositive Power 1,332,7612
9.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,332,7612
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  ¨
11.	Percent of Class Represented by Amount in Row (9) 7.3%3
12.	Type of Reporting Person (See Instructions) OO

¹  Venrock Partners V, L.P., Venrock Associates V, L.P., Venrock Entrepreneurs Fund V, L.P., Venrock Partners Management V, LLC (the general partner of Venrock Partners V, L.P.), Venrock Management V, LLC (the general partner of Venrock Associates V, L.P.) and VEF Management V, LLC (the general partner of Venrock Entrepreneurs Fund V, L.P.) are members of a group for purposes of this Schedule 13G.

²  Consists of 101,955 shares of common stock owned by Venrock Partners V, L.P., 1,202,553 shares of common stock owned by Venrock Associates V, L.P., and 28,253 shares of common stock owned by Venrock Entrepreneurs Fund V, L.P.

³  This percentage is calculated based upon 18,349,602 shares of the Issuer’s common stock outstanding as of December 31, 2013, as set forth in the Issuer’s prospectus filed pursuant to Rule 424(b)(4), filed with the Securities and Exchange Commission on January 9, 2014.

Page 8 of 13

Introductory Note: This Statement on Schedule 13G is filed on behalf of Venrock Partners V, L.P., a limited partnership organized under the laws of the State of Delaware (“VP”), Venrock Associates V, L.P., a limited partnership organized under the laws of the State of Delaware (“Venrock V”), Venrock Entrepreneurs Fund V, L.P., a limited partnership organized under the laws of the State of Delaware (“Entrepreneurs Fund”), Venrock Partners Management V, LLC, a limited liability company organized under the laws of the State of Delaware (“VP Management”), Venrock Management V, LLC, a limited liability company organized under the laws of the State of Delaware (“Venrock Management”) and VEF Management V, LLC, a limited liability company organized under the laws of the State of Delaware (“VEF Management” and collectively with VP, Venrock V, Entrepreneurs Fund, VP Management and Venrock Management, the “Venrock Entities”) in respect of shares of common stock of Receptos, Inc.

Item 1.

(a) Name of Issuer

Receptos, Inc.

(b) Address of Issuer’s Principal Executive Offices

10835 Road to the Cure

Suite 205

San Diego, California 92121

Item 2.

(a) Name of Person Filing

Venrock Partners V, L.P.

Venrock Associates V, L.P.

Venrock Entrepreneurs Fund V, L.P.

Venrock Partners Management V, LLC

Venrock Management V, LLC

VEF Management V, LLC

(b) Address of Principal Business Office or, if none, Residence

New York Office:	Palo Alto Office:	Cambridge Office:
530 Fifth Avenue	3340 Hillview Avenue	55 Cambridge Parkway
22nd Floor	Palo Alto, CA 94304	Suite 100
New York, NY 10036		Cambridge, MA 02142

(c) Citizenship

Each of VP, Venrock V and Entrepreneurs Fund are limited partnerships organized in the State of Delaware. Each of VP Management, Venrock Management and VEF Managament are limited liability companies organized in the State of Delaware.

(d) Title of Class of Securities

Common Stock

(e) CUSIP Number

756207106

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:

Not applicable

Page 9 of 13

Item 4. Ownership

(a)	Amount Beneficially Owned as of December 31, 2013:
	Venrock Partners V, L.P.	1,332,761	(1)
	Venrock Associates V, L.P.	1,332,761	(1)
	Venrock Entrepreneurs Fund V, L.P.	1,332,761	(1)
	Venrock Partners Management V, LLC	1,332,761	(1)
	Venrock Management V, LLC	1,332,761	(1)
	VEF Management V, LLC	1,332,761	(1)
(b)	Percent of Class as of December 31, 2013:
	Venrock Partners V, L.P.	7.3	%
	Venrock Associates V, L.P.	7.3	%
	Venrock Entrepreneurs Fund V, L.P.	7.3	%
	Venrock Partners Management V, LLC	7.3	%
	Venrock Management V, LLC	7.3	%
	VEF Management V, LLC	7.3	%
(c)	Number of shares as to which the person has, as of December 31, 2013:
(i)	Sole power to vote or to direct the vote
	Venrock Partners V, L.P.	0
	Venrock Associates V, L.P.	0
	Venrock Entrepreneurs Fund V, L.P.	0
	Venrock Partners Management V, LLC	0
	Venrock Management V, LLC	0
	VEF Management V, LLC	0
(ii)	Shared power to vote or to direct the vote
	Venrock Partners V, L.P.	1,332,761	(1)
	Venrock Associates V, L.P.	1,332,761	(1)
	Venrock Entrepreneurs Fund V, L.P.	1,332,761	(1)
	Venrock Partners Management V, LLC	1,332,761	(1)
	Venrock Management V, LLC	1,332,761	(1)
	VEF Management V, LLC	1,332,761	(1)
(V)	Sole power to dispose or to direct the disposition of
	Venrock Partners V, L.P.	0
	Venrock Associates V, L.P.	0
	Venrock Entrepreneurs Fund V, L.P.	0
	Venrock Partners Management V, LLC	0
	Venrock Management V, LLC	0
	VEF Management V, LLC	0
(iv)	Shared power to dispose or to direct the disposition of
	Venrock Partners V, L.P.	1,332,761	(1)
	Venrock Associates V, L.P.	1,332,761	(1)
	Venrock Entrepreneurs Fund V, L.P.	1,332,761	(1)
	Venrock Partners Management V, LLC	1,332,761	(1)
	Venrock Management V, LLC	1,332,761	(1)
	VEF Management V, LLC	1,332,761	(1)

(1) These shares are owned directly as follows: 101,955 shares of common stock are owned by Venrock Partners V, L.P., 1,202,553 shares of common stock are owned by Venrock Associates V, L.P., and 28,253 shares of common stock are owned by Venrock Entrepreneurs Fund V, L.P.

Page 10 of 13

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 ¨.

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 a Group

Not Applicable

Item 10. Certification

Not Applicable

Page 11 of 13

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Statement is true, complete and correct.

Dated: February 14, 2014

Venrock Partners V, L.P.
By:	Venrock Partners Management V, LLC
	Its General Partner
By:	/s/ David Stepp
	Authorized Signatory
Venrock Associates V, L.P.
By:	Venrock Management V, LLC
	Its General Partner
By:	/s/ David Stepp
	Authorized Signatory
Venrock Entrepreneurs Fund V, L.P.
By:	VEF Management V, LLC
	Its General Partner
By:	/s/ David Stepp
	Authorized Signatory
Venrock Partners Management V, LLC
By:	/s/ David Stepp
	Authorized Signatory
Venrock Management V, LLC
By:	/s/ David Stepp
	Authorized Signatory
VEF Management V, LLC
By:	/s/ David Stepp
	Authorized Signatory

Page 12 of 13

EXHIBITS

A: Joint Filing Agreement

Page 13 of 13

EXHIBIT A

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Common Stock of Receptos, Inc. and further agree that this agreement be included as an exhibit to such filing. Each party to the agreement expressly authorizes each other party to file on its behalf any and all amendments to such statement. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts.

In evidence whereof, the undersigned have caused this Agreement to be executed on their behalf this 14^th day of February, 2014.

Venrock Partners V, L.P.
By:	Venrock Partners Management V, LLC
	Its General Partner
By:	/s/ David Stepp
	Authorized Signatory
Venrock Associates V, L.P.
By:	Venrock Management V, LLC
	Its General Partner
By:	/s/ David Stepp
	Authorized Signatory
Venrock Entrepreneurs Fund V, L.P.
By:	VEF Management V, LLC
	Its General Partner
By:	/s/ David Stepp
	Authorized Signatory
Venrock Partners Management V, LLC
By:	/s/ David Stepp
	Authorized Signatory
Venrock Management V, LLC
By:	/s/ David Stepp
	Authorized Signatory
VEF Management V, LLC
By:	/s/ David Stepp
	Authorized Signatory