GERMAN CHRISTOPHER PAUL (Corporate Controller & CAO) sold 4.64K shares of RHYTHM PHARMACEUTICALS, INC. on the open market

Open‑market sale worth $428.1K. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

GERMAN CHRISTOPHER PAUL

Filed: 5/19/2026ACC: 0001104659-26-063830

InsiderGERMAN CHRISTOPHER PAULCIK 1260835

→

IssuerRHYTHM PHARMACEUTICALS, INC.CIK 1649904

Officer· Corporate Controller & CAO

Since Mar 2026

-4.64K

Net shares

Net seller

$428.1K

Total sold

Open market trades

0B · 1S

Total transactions

4.44K acquired · 9.09K disposed

Non-Derivative Transactions4

Common Stock

Direct

M · Option Exercise

+1.69K

Price / share

$56.69

Trade value

$95.64K

% of position

839.3%

5/15/2026

201.00→1.89K

Common Stock

Direct

M · Option Exercise

+1.35K

Price / share

$49.23

Trade value

$66.41K

% of position

71.5%

5/15/2026

1.89K→3.24K

Common Stock

Direct

M · Option Exercise

+1.41K

Price / share

$17.97

Trade value

$25.27K

% of position

43.4%

5/15/2026

3.24K→4.64K

Common Stock

Direct

S · Sale

−4.64K

Price / share

$92.21

Trade value

$428.13K

% of position

New position

5/15/2026

4.64K→0.00

Total

Net shares

−201.00

Net value

-$240.82K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	5/15/2026	M · Option Exercise	+1.69K	$56.69	$95.64K	839.3%	201.00	1.89K
Common Stock Direct	5/15/2026	M · Option Exercise	+1.35K	$49.23	$66.41K	71.5%	1.89K	3.24K
Common Stock Direct	5/15/2026	M · Option Exercise	+1.41K	$17.97	$25.27K	43.4%	3.24K	4.64K
Common Stock Direct	5/15/2026	S · Sale	−4.64K	$92.21	$428.13K	New position	4.64K	0.00
Total			−201.00		-$240.82K

Derivative Transactions3

Stock Options (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

1.69K shares

−1.69K

Strike price

56.69

Held after

3.71K

Exercisable

—

5/15/2026

Stock Options (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

1.35K shares

−1.35K

Strike price

49.23

Held after

2.70K

Exercisable

—

5/15/2026

Stock Options (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

1.41K shares

−1.41K

Strike price

17.97

Held after

2.33K

Exercisable

—

5/15/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Options (Right to Buy) Direct	Common Stock1.69K shares	5/15/2026	M · Option Exercise	−1.69K	56.69	—	3.71K
Stock Options (Right to Buy) Direct	Common Stock1.35K shares	5/15/2026	M · Option Exercise	−1.35K	49.23	—	2.70K
Stock Options (Right to Buy) Direct	Common Stock1.41K shares	5/15/2026	M · Option Exercise	−1.41K	17.97	—	2.33K