Merck closes $8 billion debt offering across eight note series with rates up to 5.70%

Filed December 4, 2025 · Period ending December 4, 2025 · ~1 min read

Key Changes

• high

  Merck raised $8 billion through eight debt tranches with maturities from 2029 to 2065, including $500M floating rate notes and $7.5B fixed-rate notes with coupons ranging from 3.85% to 5.70%.

  Item 8.01 verify on EDGAR →
• high

  The offering includes $3.5 billion in long-dated debt (2046-2065) with rates above 5.5%, locking in higher interest costs for decades but providing long-term capital certainty.

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• medium

  This substantial debt raise will increase Merck's interest expense and leverage ratios, though the company has not disclosed the specific use of proceeds in this filing.

  Item 8.01 verify on EDGAR →