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Filing Details

Accession Number:: 0001104659-13-041514
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2013-05-14 17:32:13
Reporting Period:: 2013-05-14

Filing Date:: 2013-05-14
Accepted Time:: 2013-05-14 17:32:13
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1463729	Receptos Inc.	RCPT	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1569248	Kristina Burow	8725 West Higgins Road, Suite 290 Chicago IL 60631		Yes	No	No	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2013-05-14	129,755	$0.00	129,755	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2013-05-14	1,022,283	$0.00	1,136,568	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2013-05-14	680,323	$0.00	1,816,891	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2013-05-14	284,485	$14.00	2,101,376	No	4	P	Indirect	See footnotes

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	See footnotes
No	4	C	Indirect	See footnotes
No	4	C	Indirect	See footnotes
No	4	P	Indirect	See footnotes

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A Preferred Stock	Disposition	2013-05-14	973,165	$0.00	129,755	$0.00
Common Stock	Series A Preferred Stock	Disposition	2013-05-14	7,667,124	$0.00	1,022,283	$0.00
Common Stock	Series B Preferred Stock	Disposition	2013-05-14	5,102,426	$0.00	680,323	$0.00

Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	13,333	Direct

Footnotes

The Series A preferred stock and Series B preferred stock converted 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 A preferred Stock and Series B preferred Stock, for no additional consideration.
Beneficial ownership consists of an aggregate of 129,755 shares of common stock issued upon conversion of shares of Series A preferred stock held by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.
Beneficial ownership consists of: (i) 398,770 shares of common stock held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII") and (ii) 1,702,606 shares of common stock issued upon conversion of shares of Series A preferred stock and Series B preferred stock held by ARCH Fund VII. The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.
The managing directors of ARCH VI LLC and ARCH VII LLC are Keith Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH Fund VI and ARCH Fund VII. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Kristina Burow owns an indirect interest in ARCH Partners VI and ARCH Partners VII but does not have voting or investment control over the shares held by ARCH Fund VI or ARCH Fund VII and disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.