Scholar Rock Appoints Rebecca McLeod Chief Brand Officer and U.S. General Manager

• Rebecca McLeod brings exceptional U.S. operating experience; most recently served as argenx U.S. General Manager responsible for leading the launch of VYVGART® for gMG and CIDP

Scholar Rock (NASDAQ:SRRK), a late-stage biopharmaceutical company focused on developing and commercializing apitegromab for patients with spinal muscular atrophy (SMA) and other severe and debilitating neuromuscular diseases, today announced that Rebecca McLeod has been appointed to the newly created role of Chief Brand Officer and U.S. General Manager. In this role, she will be responsible for leading the anticipated U.S. commercial launch of apitegromab for patients with SMA – along with establishing the global apitegromab brand strategy and market positioning for Europe, Asia-Pacific and Latin America.

"Rebecca's unprecedented experience in building and leading U.S. operations at argenx to launch VYVGART® successfully is invaluable as Scholar Rock accelerates planning toward our anticipated initial launch in SMA this year," said R. Keith Woods, Chief Operating Officer of Scholar Rock. "Launching apitegromab in the U.S. is vital in bringing the potentially transformative benefits of apitegromab to patients with SMA. I am confident that under her leadership, we will deliver for the SMA community in the U.S. and around the world as we become a global leader in developing and delivering innovative therapies to treat patients with rare, severe and debilitating neuromuscular disorders."

Ms. McLeod is a 25-year pharmaceutical and biotechnology industry veteran who joins Scholar Rock from argenx, where she led market access, distribution, patient services, medical affairs, operations, marketing and sales for the U.S. organization. Under her leadership, argenx has delivered one of the most successful biopharmaceutical franchise launches with VYVGART. Earlier, she served in several commercial leadership positions across sales, marketing and product management at Alexion Pharmaceuticals and Takeda Pharmaceuticals.

"I am thrilled to join Scholar Rock at this pivotal time of scale and growth as we prepare to become a global commercial biotechnology company," said Ms. McLeod. "I'm honored to leverage my leadership experience over the past seven years in the neuromuscular rare disease space to now build and lead Scholar Rock's U.S. operations as we plan to deliver apitegromab for children and adults with SMA, while also rolling out our global apitegromab brand strategy."

About Scholar Rock

Scholar Rock is a biopharmaceutical company that discovers, develops, and delivers life-changing therapies for people with serious diseases that have high unmet need. As a global leader in the biology of the transforming growth factor beta (TGFβ) superfamily, the company is named for the visual resemblance of a scholar rock to protein structures. Over the past decade, Scholar Rock has created a pipeline with the potential to advance the standard of care for neuromuscular disease, cardiometabolic disorders, cancer, and other conditions where growth factor-targeted drugs can play a transformational role.

This commitment to unlocking fundamentally different therapeutic approaches is powered by broad application of a proprietary platform, which has developed novel monoclonal antibodies to modulate protein growth factors with extraordinary selectivity. By harnessing cutting-edge science in disease spaces that are historically under-addressed through traditional therapies, Scholar Rock works every day to create new possibilities for patients. Learn more about our approach at ScholarRock.com and follow @ScholarRock and on LinkedIn.

Availability of Other Information About Scholar Rock

Investors and others should note that we communicate with our investors and the public using our company website www.scholarrock.com, including, but not limited to, company disclosures, investor presentations and FAQs, Securities and Exchange Commission filings, press releases, public conference call transcripts and webcast transcripts, as well as on X (formerly known as Twitter) and LinkedIn. The information that we post on our website or on X (formerly known as Twitter) or LinkedIn could be deemed to be material information. As a result, we encourage investors, the media and others interested to review the information that we post there on a regular basis. The contents of our website or social media shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended.

VYVGART® is a trademark of argenx.

Forward-Looking Statements

This press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding Scholar Rock's future expectations, plans and prospects, including without limitation, Scholar Rock's expectations regarding its growth, strategy, the timing and results of regulatory submissions, the therapeutic potential of apitegromab, its transition to a fully integrated global commercial enterprise and planned launch of apitegromab, the establishment of its global brand strategy and the anticipated impact of the leadership appointment described herein. The use of words such as "may," "might," "could," "will," "should," "expect," "plan," "anticipate," "believe," "estimate," "project," "intend," "future," "potential," or "continue," and other similar expressions are intended to identify such forward-looking statements. All such forward-looking statements are based on management's current expectations of future events and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by such forward-looking statements. These risks and uncertainties include, without limitation, whether the results from the Phase 3 SAPPHIRE trial will be sufficient to support regulatory approval, that preclinical and clinical data, including the results from the Phase 2 or Phase 3 clinical trial of apitegromab, are not predictive of, may be inconsistent with, or more favorable than, data generated from future or ongoing clinical trials of the same product candidates; information provided or decisions made by regulatory authorities; competition from third parties that are developing products for similar uses; Scholar Rock's ability to obtain, maintain and protect its intellectual property; Scholar Rock's dependence on third parties for development and manufacture of product candidates including, without limitation, to supply any clinical trials; and Scholar Rock's ability to manage expenses and to obtain additional funding when needed to support its business activities and establish and maintain strategic business alliances and new business initiatives, and Scholar Rock's ability to continue as a going concern; as well as those risks more fully discussed in the section entitled "Risk Factors" in Scholar Rock's Quarterly Report on Form 10-Q for the quarter ended March 31, 2025, as well as discussions of potential risks, uncertainties, and other important factors in Scholar Rock's subsequent filings with the Securities and Exchange Commission. Any forward-looking statements represent Scholar Rock's views only as of today and should not be relied upon as representing its views as of any subsequent date. All information in this press release is as of the date of the release, and Scholar Rock undertakes no duty to update this information unless required by law.

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Scholar Rock:

Investors & Media

Rushmie Nofsinger

Scholar Rock

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