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Filing Details

Accession Number:: 0001104659-18-059105
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2018-09-27 16:02:03
Reporting Period:: 2018-09-25

Accepted Time:: 2018-09-27 16:02:03
SEC Url:: Form 4 Filing

Issuer

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

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1615726	H.t. Leonardus Ploeg Der Van	500 Boylston Street, 11Th Floor Boston MA 02116	Chief Scientific Officer	No	Yes	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
Common Stock	Disposition	2018-06-29	2,000	$0.00	62,339	No	5	G	Direct
Common Stock	Acquisiton	2018-09-25	21,800	$4.59	84,139	No	4	M	Direct
Common Stock	Disposition	2018-09-25	3,686	$27.45	80,453	No	4	S	Direct
Common Stock	Disposition	2018-09-25	9,052	$28.88	71,401	No	4	S	Direct
Common Stock	Disposition	2018-09-25	7,656	$29.81	63,745	No	4	S	Direct
Common Stock	Disposition	2018-09-25	5,304	$30.60	58,441	No	4	S	Direct
Common Stock	Disposition	2018-09-25	6,102	$31.86	52,339	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	5	G	Direct
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2018-09-25	21,800	$0.00	21,800	$4.59

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
41,671		2025-11-16	No	4	M	Direct

Footnotes

Mr. Van der Ploeg is voluntarily reporting a gift transfer of shares of common stock.
On September 25, 2018, Mr. Van der Ploeg sold 31,800 shares in multiple trades at prices ranging from $27.12 to $32.36 pursuant to a plan of disposition adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934 (the "10b5-1 Plan").
This transaction was executed in multiple trades at prices ranging from $27.12 to $27.88, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Securities and Exchange Commission staff (the "Staff"), the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.
This transaction was executed in multiple trades at prices ranging from $28.20 to $29.19, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.
This transaction was executed in multiple trades at prices ranging from $29.21 to $30.20, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.
This transaction was executed in multiple trades at prices ranging from $30.21 to $31.20, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.
This transaction was executed in multiple trades at prices ranging from $31.36 to $32.05, inclusive; the price reported above reflects the weighted average sale price. Mr. Van der Ploeg hereby undertakes to provide to the Staff, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.
The stock options vest and become exercisable in 48 successive, equal monthly installments measured from August 3, 2015.