Rhythm Pharmaceuticals Ownership & Insider Activity

Rhythm Pharmaceuticals (RYTM) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 1.9% of shares outstanding. Institutional investors hold 72.0%. Over the past 90 days, insiders made 5 sales worth $20.9M.

Shares Outstanding

68.852M

Shares Float

68.317M

Insider Shares Owned

1.313M

Insider % Owned

1.9%

Institutional Shares Held

49.593M

Institutional % Held

72.0%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$20.9M total

Net Activity

Net Selling

Net Value (90d)

-$20.9M

Rhythm Pharmaceuticals Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Sep 14, 2026	David P Meeker	PRESIDENT AND CEO	SELL-OPTIONS	—	$54.36	$4.8M
Aug 31, 2026	Hunder Smith	CHIEF FINANCIAL OFFICER	SELL	5.587K	$65.62	$5.1M
Aug 13, 2026	Joseph Shulman	CHIEF TECHNICAL OFFICER	SELL	3.055K	$63.27	$594K
Aug 13, 2026	Alastair Garfield	CHIEF SCIENTIFIC OFFICER	SELL	7.763K	$117.57	$913K
Aug 13, 2026	Jennifer Kayden Lee	EVP, HEAD NORTH AMERICA	SELL	19.233K	$67.50	$7.9M
Aug 12, 2026	Yann Mazabraud	EVP, HEAD INTERNATIONAL	SELL	10.375K	$61.48	$6.3M
Jun 22, 2026	Lynn A Tetrault	DIRECTOR	SELL-OPTIONS	—	$64.30	$2.7M
May 15, 2026	Christopher Paul German	CORPORATE CONTROLLER & CAO	SELL	201.000	$67.19	$241K