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Scholar Rock Holding Corp. planned insider sales

In the last twelve months insiders at Scholar Rock Holding Corp. filed 12 Form 144 notices of planned sales, 227,229 shares worth $10.4 million at the time of filing, from 6 sellers. The latest, filed 1 October 2026: Katie Peng (director), 1,006 shares worth $48,610, planned for around 1 October 2026 through J.P. Morgan Securities LLC.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
1 October 2026Katie PengDirector1,006$48,6101 October 2026None on Form 4 yetJ.P. Morgan Securities LLCRSUForm 144
6 July 2026Mohammed QatananiOfficer11,704$639,9756 July 2026No matching Form 4 saleJ.P. Morgan Securities LLCStock Option ExerciseForm 144
1 July 2026Michael GilmanDirector2,544$139,3851 July 20262,544 shares from 1 July 2026J.P. Morgan Securities LLCRSUForm 144
1 July 2026Joshua ReedDirector3,053$167,2741 July 20263,053 shares from 1 July 2026J.P. Morgan Securities LLCRSUForm 144
1 July 2026Jeffrey S. FlierDirector3,053$167,2741 July 20263,053 shares from 1 July 2026J.P. Morgan Securities LLCRSUForm 144
1 July 2026Kristina BurowDirector3,053$167,2741 July 20263,053 shares from 1 July 2026J.P. Morgan Securities LLCRSUForm 144
1 July 2026Katie PengDirector5,446$298,3861 July 20265,446 shares from 1 July 2026J.P. Morgan Securities LLCRSUForm 144
6 April 2026Mohammed QatananiOfficer23,408$1.2 million6 April 2026No matching Form 4 saleJ.P. Morgan Securities LLCStock Option ExerciseForm 144
23 February 2026Mohammed QatananiOfficer8,484$409,94723 February 2026No matching Form 4 saleJ.P. Morgan Securities LLCRestricted Stock AwardForm 144
22 January 2026Mohammed QatananiOfficer14,898$686,05322 January 2026No matching Form 4 saleJ.P. Morgan Securities LLCRestricted Stock AwardForm 144
16 December 2025Katie PengDirector1,006$45,51116 December 20251,006 shares from 16 December 2025J.P. Morgan Securities LLCRSUForm 144
4 December 2025Mohammed QatananiOfficer149,574$6.4 million4 December 2025No matching Form 4 saleJ.P. Morgan Securities LLCStock Option ExerciseForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?