Mirum prices $690M convertible notes, uses $475M cash + 3.2M shares to refinance $237M of 2029 debt

Filed May 18, 2026 · Period ending May 12, 2026 · ~1 min read

Key Changes

• high

  Issued $690M of 0% convertible notes due 2032 (conversion price $138.94/share, 30% premium to May 12 close). Net proceeds $671.6M after fees.

  Item 1.01 — Entry into a Material Definitive Agreement verify on EDGAR →
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  Used $475M cash plus 3,220,529 shares to exchange $237.2M principal of existing 4% 2029 notes, eliminating near-term maturity and interest expense.

  Item 1.01 — Entry into a Material Definitive Agreement verify on EDGAR →
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  Notes convert into up to 6.5M shares at initial rate of 9.3562 shares per $1,000 principal, subject to anti-dilution adjustments. Company may settle in cash, stock, or combination.

  Item 3.02 — Unregistered Sales of Equity Securities verify on EDGAR →