Microsoft sells $25 billion in senior unsecured notes maturing 2028 to 2066
Microsoft issued $25 billion of senior unsecured notes in 10 tranches, maturing between 2028 and 2066, under an underwriting agreement dated October 29, 2026. The notes rank equally with its other unsecured, unsubordinated debt, so the offering adds to the company's long-term borrowing. The filing describes the terms but does not state how the proceeds will be used.
Key points
- Total principal of $25 billion across 10 tranches: $2 billion of floating rate notes due 2028 and 2029, plus fixed rate notes from $2 billion to $4 million.
- Fixed rate coupons range from 4.850% (2028 notes) to 6.350% (2066 notes).
- Interest on floating rate notes is paid quarterly starting February 3, 2027; fixed rate notes pay semi-annually starting May 3, 2027.
- Issued under a 2009 base indenture with The Bank of New York Mellon Trust Company, N.A. as trustee, and a supplemental indenture dated November 4, 2026.
The filing
Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 7, 2026, 11:17 PM ET, from the text of the filing and its press-release exhibits only.
Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.