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Mirum Pharmaceuticals, Inc. MIRM

Mirum Pharmaceuticals, Inc., a biopharmaceutical company, focuses on the development and commercialization of novel therapies for debilitating rare and orphan diseases. Its lead product candidate is LIVMARLI (maralixibat), an orally administered and minimally absorbed ileal bile acid transporter (IBAT) inhibitor that is approved for the treatment of cholestatic pruritus in patients with Alagille syndrome in the United States and internationally.

Company profile

Business mix

  • Its lead product candidate is LIVMARLI (maralixibat), an orally administered and minimally absorbed ileal bile acid transporter (IBAT) inhibitor that is approved for the treatment of cholestatic pruritus in patients with Alagille syndrome in the United States.
  • The company is also involved in the commercialization of Cholbam, a cholic acid capsule, which is approved as treatment for pediatric and adult patients with bile acid synthesis disorders due to single enzyme defects and for adjunctive treatment of patients.
  • In addition, it develops Volixibat, an oral and minimally absorbed agent designed to inhibit IBAT, currently under Phase 2b clinical trial for the treatment of adult patients with cholestatic liver diseases.
  • The company has a collaboration agreement with the Shire International GmbH; License Agreement with Pfizer Inc.; Sanofi-Aventis Deutschland GmbH; Novartis Pharma AG; Lonza Ltd.; Enthorin Therapeutics, LLC and Dart Neuroscience LLC.

Current key questions

  • Can the company's products, services, or pipeline expand adoption within biotechnology?
  • How do reimbursement, regulation, clinical data, patents, and commercial execution affect growth?
  • Can margins and cash flow improve while funding research, manufacturing, or go-to-market investment?
Holders 1 Current sample portfolio
Public mentions 0 Videos / interviews / letters

Current firm holders

Firm Weight Value Filing period
Baker Bros. Advisors 0.2% $41.2M 2026-03-31

Recent trading changes over the last 4 quarters

Net buyers 1 Last 4 13F filing periods
Net reducers 0 Last 4 13F filing periods
Unchanged holders 0 Share count unchanged
Increase amount $41.2M Estimated from net added shares
Reduction amount $0 Estimated from net reduced shares
Net share change / base shares New +445,975 / 0
Baker Bros. Advisors 1 filing periods
13F 2026-03-31 Filed 2026-05-15
New Shares - 13F value change +$41.2M
Settlement As of 13F 2026-03-31 · Filed 2026-05-15
Base shares 0 Last 4 periods +445,975 (New) Total shares 445,975 Value $41.2M

Recent mentions

No public mentions.