SMITH HUNTER C (Chief Financial Officer) sold 5.6% of their position (7.07K shares) of RHYTHM PHARMACEUTICALS, INC. on the open market

Open‑market sale worth $708.6K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 10 sales

SMITH HUNTER C

Filed: 2/12/2026ACC: 0001104659-26-014546

InsiderSMITH HUNTER CCIK 1636385

→

IssuerRHYTHM PHARMACEUTICALS, INC.CIK 1649904

Officer· Chief Financial Officer

Since Mar 2026

+55.43K

Net shares

Net buyer

$708.6K

Total sold

Open market trades

0B · 10S

Total transactions

62.50K acquired · 7.07K disposed

Non-Derivative Transactions10

Common Stock

Direct

S · Sale

−1.91K

Price / share

$102.66

Trade value

$196.38K

% of position

1.5%

2/10/2026

125.54K→123.62K

Common Stock

Direct

S · Sale

−700.00

Price / share

$103.68

Trade value

$72.57K

% of position

0.6%

2/10/2026

123.62K→122.92K

Common Stock

Direct

S · Sale

−100.00

Price / share

$104.76

Trade value

$10.48K

% of position

0.1%

2/10/2026

122.92K→122.82K

Common Stock

Direct

S · Sale

−2.27K

Price / share

$98.37

Trade value

$222.91K

% of position

1.8%

2/11/2026

122.82K→120.56K

Common Stock

Direct

S · Sale

−400.00

Price / share

$99.44

Trade value

$39.77K

% of position

0.3%

2/11/2026

120.56K→120.16K

Common Stock

Direct

S · Sale

−100.00

Price / share

$100.85

Trade value

$10.09K

% of position

0.1%

2/11/2026

120.16K→120.06K

Common Stock

Direct

S · Sale

−292.00

Price / share

$96.26

Trade value

$28.11K

% of position

0.2%

2/12/2026

120.06K→119.77K

Common Stock

Direct

S · Sale

−400.00

Price / share

$97.67

Trade value

$39.07K

% of position

0.3%

2/12/2026

119.77K→119.37K

Common Stock

Direct

S · Sale

−800.00

Price / share

$98.99

Trade value

$79.19K

% of position

0.7%

2/12/2026

119.37K→118.57K

Common Stock

Direct

S · Sale

−100.00

Price / share

$100.10

Trade value

$10.01K

% of position

0.1%

2/12/2026

118.57K→118.47K

Total

Net shares

−7.07K

Net value

-$708.58K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	2/10/2026	S · Sale	−1.91K	$102.66	$196.38K	1.5%	125.54K	123.62K
Common Stock Direct	2/10/2026	S · Sale	−700.00	$103.68	$72.57K	0.6%	123.62K	122.92K
Common Stock Direct	2/10/2026	S · Sale	−100.00	$104.76	$10.48K	0.1%	122.92K	122.82K
Common Stock Direct	2/11/2026	S · Sale	−2.27K	$98.37	$222.91K	1.8%	122.82K	120.56K
Common Stock Direct	2/11/2026	S · Sale	−400.00	$99.44	$39.77K	0.3%	120.56K	120.16K
Common Stock Direct	2/11/2026	S · Sale	−100.00	$100.85	$10.09K	0.1%	120.16K	120.06K
Common Stock Direct	2/12/2026	S · Sale	−292.00	$96.26	$28.11K	0.2%	120.06K	119.77K
Common Stock Direct	2/12/2026	S · Sale	−400.00	$97.67	$39.07K	0.3%	119.77K	119.37K
Common Stock Direct	2/12/2026	S · Sale	−800.00	$98.99	$79.19K	0.7%	119.37K	118.57K
Common Stock Direct	2/12/2026	S · Sale	−100.00	$100.10	$10.01K	0.1%	118.57K	118.47K
Total			−7.07K		-$708.58K

Derivative Transactions2

Restricted Stock Units

Direct

A · Award

Converts to

Common Stock

25K shares

+25K

Strike price

Held after

25K

Exercisable

—

2/11/2026

Stock Options (Right to Buy)

Direct

A · Award

Converts to

Common Stock

37.50K shares

+37.50K

Strike price

98.47

Held after

37.50K

Exercisable

—

2/11/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock25K shares	2/11/2026	A · Award	+25K		—	25K
Stock Options (Right to Buy) Direct	Common Stock37.50K shares	2/11/2026	A · Award	+37.50K	98.47	—	37.50K