Key Takeaways:
- Mirum Pharmaceuticals shares surged 5.1% on higher than average volume.
- The rally comes ahead of a pivotal FDA decision for its drug Volixibat in May.
- Volixibat, if approved, would compete with Intercept's Ocaliva in the PBC market.
Key Takeaways:

Mirum Pharmaceuticals (MIRM) saw its shares climb 5.1 percent on Tuesday, as investors anticipate a key regulatory decision for its lead drug candidate.
"The market is clearly building a position ahead of the PDUFA date for Volixibat," said a sector analyst. "A positive outcome could significantly de-risk the company and unlock a new revenue stream."
The stock closed at $35.50, up $1.72 on the day, with trading volume 70% above its 30-day average. The move extends a three-month rally of over 25% for the company. The upcoming Food and Drug Administration (FDA) decision for Volixibat for the treatment of primary biliary cholangitis (PBC) is expected in May 2026.
An approval for Volixibat would position Mirum to challenge Intercept Pharmaceuticals' (ICPT) Ocaliva, the current standard of care for PBC. The PBC market is estimated to be worth over $1 billion annually, representing a significant commercial opportunity for Mirum.
The recent stock performance suggests growing investor confidence in a positive FDA outcome for Volixibat. Investors will be closely watching for the official announcement in May, which will be the next major catalyst for the stock.
This article is for informational purposes only and does not constitute investment advice.