Mirum prices $600M 2032 convertible notes to refinance 2029 converts
Mirum priced a $600 million convertible senior notes offering due 2032, with an option for purchasers to buy an additional $90 million. Proceeds are intended to refinance a portion of its existing 2029 convertible notes and for general corporate purposes.
1) What happened today
On May 13, 2026, Mirum disclosed it priced a $600.0 million private offering of convertible senior notes due 2032, including an initial purchaser option for up to an additional $90.0 million in notes.
2) Why it matters for the stock
Convertible financings can be a material same-day catalyst because they impact capital structure, potential future dilution via conversion, and near-term liquidity. Mirum indicated the transaction is intended to refinance a portion of its existing 2029 convertible notes, which can also change maturity profile and reduce refinancing risk.
3) Key details investors are focusing on
The notes were described as convertible senior notes due 2032 and are expected to settle shortly after pricing, subject to customary closing conditions. The company stated proceeds will be used in part for cash consideration in connection with note exchange transactions involving its existing 4.00% convertible senior notes due 2029, with remaining proceeds for general corporate purposes.