QATANANI MO (CHIEF SCIENTIFIC OFFICER) sold 10.7% of their position (13.11K shares) of SCHOLAR ROCK HOLDING CORP on the open market

Open‑market sale worth $592.6K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

QATANANI MO

Filed: 1/16/2026ACC: 0001980298-26-000002

InsiderQATANANI MOCIK 1980298

→

IssuerSCHOLAR ROCK HOLDING CORPCIK 1727196

Officer· CHIEF SCIENTIFIC OFFICER

Since Feb 2026

-13.11K

Net shares

Net seller

$592.6K

Total sold

Open market trades

0B · 1S

Total transactions

13.11K acquired · 26.22K disposed

Non-Derivative Transactions6

Common Stock

Direct

M · Option Exercise

+1.41K

Price / share

$18.08

Trade value

$25.44K

% of position

1.3%

1/14/2026

108.96K→110.37K

Common Stock

Direct

M · Option Exercise

+321.00

Price / share

$7.62

Trade value

$2.45K

% of position

0.3%

1/14/2026

110.37K→110.69K

Common Stock

Direct

M · Option Exercise

+2.81K

Price / share

$10.00

Trade value

$28.13K

% of position

2.5%

1/14/2026

110.69K→113.50K

Common Stock

Direct

M · Option Exercise

+5.89K

Price / share

$15.75

Trade value

$92.81K

% of position

5.2%

1/14/2026

113.50K→119.40K

Common Stock

Direct

M · Option Exercise

+2.68K

Price / share

$35.15

Trade value

$94.13K

% of position

2.2%

1/14/2026

119.40K→122.08K

Common Stock

Direct

S · Sale

−13.11K

Price / share

$45.20

Trade value

$592.61K

% of position

10.7%

1/14/2026

122.08K→108.96K

Total

Net shares

+0.00

Net value

-$349.65K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	1/14/2026	M · Option Exercise	+1.41K	$18.08	$25.44K	1.3%	108.96K	110.37K
Common Stock Direct	1/14/2026	M · Option Exercise	+321.00	$7.62	$2.45K	0.3%	110.37K	110.69K
Common Stock Direct	1/14/2026	M · Option Exercise	+2.81K	$10.00	$28.13K	2.5%	110.69K	113.50K
Common Stock Direct	1/14/2026	M · Option Exercise	+5.89K	$15.75	$92.81K	5.2%	113.50K	119.40K
Common Stock Direct	1/14/2026	M · Option Exercise	+2.68K	$35.15	$94.13K	2.2%	119.40K	122.08K
Common Stock Direct	1/14/2026	S · Sale	−13.11K	$45.20	$592.61K	10.7%	122.08K	108.96K
Total			+0.00		-$349.65K

Derivative Transactions5

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

1.41K shares

−1.41K

Strike price

18.08

Held after

0.00

Exercisable

—

1/14/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

321.00 shares

−321.00

Strike price

7.62

Held after

961.00

Exercisable

—

1/14/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

2.81K shares

−2.81K

Strike price

Held after

11.25K

Exercisable

—

1/14/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

5.89K shares

−5.89K

Strike price

15.75

Held after

47.14K

Exercisable

—

1/14/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Common Stock

2.68K shares

−2.68K

Strike price

35.15

Held after

32.14K

Exercisable

—

1/14/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Right to Buy) Direct	Common Stock1.41K shares	1/14/2026	M · Option Exercise	−1.41K	18.08	—	0.00
Stock Option (Right to Buy) Direct	Common Stock321.00 shares	1/14/2026	M · Option Exercise	−321.00	7.62	—	961.00
Stock Option (Right to Buy) Direct	Common Stock2.81K shares	1/14/2026	M · Option Exercise	−2.81K	10	—	11.25K
Stock Option (Right to Buy) Direct	Common Stock5.89K shares	1/14/2026	M · Option Exercise	−5.89K	15.75	—	47.14K
Stock Option (Right to Buy) Direct	Common Stock2.68K shares	1/14/2026	M · Option Exercise	−2.68K	35.15	—	32.14K