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Filing Details

Accession Number:: 0001638599-17-001008
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2017-10-06 15:58:31
Reporting Period:: 2017-10-05

Accepted Time:: 2017-10-06 15:58:31
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1649904	Rhythm Pharmaceuticals Inc.	RYTM	()	4

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1087939	Julian Baker	860 Washington Street, 3Rd Floor New York NY 10014	No	No	No	Yes
1087940	Felix Baker	860 Washington Street 3Rd Floor New York NY 10014	No	No	No	Yes
1263508	Baker Bros. Advisors Lp	860 Washington Street 3Rd Floor New York NY 10014	No	No	No	Yes
1580575	Baker Bros. Advisors (Gp) Llc	860 Washington Street 3Rd Floor New York NY 10014	No	No	No	Yes

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	2017-10-05	82,969	$0.00	82,969	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2017-10-05	1,081,051	$0.00	1,081,051	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2017-10-05	87,809	$17.00	170,778	No	4	P	Indirect	See footnotes
Common Stock	Acquisiton	2017-10-05	797,191	$17.00	1,878,242	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	P	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 Convertible Prefered	Disposition	2017-10-05	760,829	$0.00	82,969	$0.00
Common Stock	Series A Convertible Prefered	Disposition	2017-10-05	9,913,242	$0.00	1,081,051	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Indirect
0			No	4	C	Indirect

Footnotes

Represents shares of common stock of Rhythm Pharmaceuticals, Inc. (the "Issuer") received upon conversion of shares of the Issuer's Series A Convertible Preferred Stock ("Series A Preferred") which automatically convert into common stock of the Issuer on a 9.17 for 1 basis (the "Conversion Ratio") without consideration upon the closing of the initial public offering of the Issuer ("IPO").
After giving effect to the transactions reported herein, and as a result of their ownership interest in Baker Biotech Capital (GP), LLC, Julian C. Baker and Felix J. Baker may be deemed to have an indirect pecuniary interest in shares of the Issuer's common stock reported in column 5 of Table I directly held by 667, L.P. ("667"), a limited partnership of which the sole general partner is Baker Biotech Capital, L.P., a limited partnership of which the sole general partner is Baker Biotech Capital (GP), LLC, due to Baker Biotech Capital, L.P.'s right to receive an allocation of a portion of the profits from 667.
After giving effect to the transactions reported herein, and as a result of their ownership interest in Baker Brothers Life Sciences Capital (GP), LLC, Julian C. Baker and Felix J. Baker may be deemed to have an indirect pecuniary interest in shares of the Issuer's common stock reported in column 5 of Table I directly held by Baker Brothers Life Sciences, L.P. ("Life Sciences" and together with 667, the "Funds"), a limited partnership of which the sole general partner is Baker Brothers Life Sciences Capital, L.P., a limited partnership of which the sole general partner is Baker Brothers Life Sciences Capital (GP), LLC, due to Baker Brothers Life Sciences Capital, L.P.'s right to receive an allocation of a portion of the profits from Life Sciences.
On October 5, 2017, 667 and Life Sciences purchased 87,809 and 797,191 shares of common stock of the Issuer at a price of $17.00 per share, respectively, pursuant to an IPO.
Effective upon the closing of the Issuer's IPO, the Series A Preferred shares of the Issuer were converted at the Conversion Ratio without consideration into the number of common shares of the Issuer shown in Column 7. The Series A Preferred shares did not have an expiration date and were convertible at any time, at the holder's election, into common shares of the Issuer.
Pursuant to Instruction 4(c)(iii), this response has been left blank.
Baker Bros. Advisors LP (the "Adviser") serves as the Investment Adviser to the Funds. In connection with the services provided by the Adviser, the Adviser receives an asset-based management fee that does not confer any pecuniary interest in the securities held by the Funds. Baker Bros. Advisors (GP) LLC (the "Adviser GP") is the Adviser's sole general partner. Julian C. Baker and Felix J. Baker are principals of the Adviser GP. The Adviser has complete and unlimited discretion and authority with respect to the investment and voting power of the securities held by the Funds.
The general partners of the Funds relinquished to the Adviser all discretion and authority with respect to the investment and voting power of the securities held by the Funds. Julian C. Baker, Felix J. Baker, the Adviser GP and the Adviser disclaim beneficial ownership of the securities held directly by the Funds except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that any of Julian C. Baker, Felix J. Baker, the Adviser GP or the Adviser is a beneficial owner of such securities for purposes of Section 16 or any other purpose.