MasTec Inc. Issues $650M 5.85% Senior Notes Due 2036

What Happened
MasTec, Inc. announced on August 17, 2026 that it completed a public offering of $650.0 million aggregate principal amount of 5.850% senior unsecured notes due 2036. The notes were issued under MasTec’s existing indenture (dated June 5, 2009) as supplemented by a Twenty-Second Supplemental Indenture dated August 17, 2026. Interest is payable March 30 and September 30 each year, beginning March 30, 2027, and the notes mature on September 30, 2036.

Key Details

• Amount: $650.0 million aggregate principal of 5.850% senior unsecured notes.
• Issue/Effective Date: Issued and closed on August 17, 2026; interest payments begin March 30, 2027; maturity September 30, 2036.
• Ranking: Senior unsecured obligations of MasTec that rank equally with other senior unsecured debt; effectively subordinated to secured debt (to the extent of collateral) and structurally subordinated to obligations of MasTec’s subsidiaries (the notes are not guaranteed by subsidiaries).
• Other terms: Notes may be redeemed (in whole or in part) at redemption prices in the indenture; U.S. Bank Trust Company, N.A. serves as trustee, registrar and paying agent.

Why It Matters
This filing creates a new long-term debt obligation for MasTec, increasing the company’s outstanding senior unsecured debt by $650M and locking in a 5.85% fixed interest rate through 2036. For investors, key implications are higher interest expense over time and a change in the company’s capital structure; these notes rank equally with other senior unsecured creditors but are behind secured creditors and all subsidiary creditors in priority. The filing does not specify the use of proceeds.