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Martin Marietta Materials 8-K Report, Material Agreement (Aug 12, 2026)

Reports
Material Agreements·Regulation FD·Exhibits & Filings
Filing Date
Filed August 12, 2026
Period End
August 11, 2026
Security
MLM
In the record · 2016–202610-K1210-Q328-K141

MLM filed 12 annual reports (10-K), 32 quarterly reports (10-Q) and 141 current reports (8-K) between 2016 and 2026.

  1. Leadership change8-K · Jun ’17Jun ’17
  2. Material agreement8-K · Sep ’19Sep ’19
  3. Deal closed8-K · Oct ’21Oct ’21
  4. Material agreement8-K · Sep ’25Sep ’25

Summary

Summary of the 8-K filed August 12, 2026. Cited figures are marked; the original filing is the authoritative source.

Martin Marietta Materials, Inc. (NYSE: MLM) filed this Form 8-K on August 12, 2026 to report the pricing of a debt offering totaling $5.5 billiona in senior notes.

The offering comprises $750 millionb of 4.850% Senior Notes due 2029, $1.25 billion of 5.200% Senior Notes due 2032, $1.0 billion of 5.400% Senior Notes due 2034, $1.5 billion of 5.625% Senior Notes due 2036, and $1.0 billion of 6.375% Senior Notes due 2056. The filing states that the Company entered into an underwriting agreement dated August 11, 2026 with Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, Deutsche Bank Securities Inc. and Truist Securities, Inc., as representatives of the underwriters.

The filing states that net proceeds from the notes, together with borrowings under a $1.5 billionc senior unsecured term loan facility, will be used to pay the cash consideration for the previously announced acquisition of all outstanding equity interests in Lhoist North America, Inc. Closing of the offering is expected in the third quarter of 2026, subject to customary closing conditions. The notes were issued at prices ranging from 99.660% to 99.936% of par value and are being sold under an effective shelf registration statement on Form S-3.

For investors, the key takeaway is that Martin Marietta is financing a large acquisition primarily with long-dated debt, adding a significant amount of debt obligations with maturities ranging from 2029 to 2056. The filing refers to risk factors in the preliminary prospectus supplement filed August 10, 2026, and in the company's 2025 Form 10-K and June 30, 2026 Form 10-Q.

Key Highlights

  1. Priced $5.5 billion aggregate principal amount of senior notes across five tranches maturing 2029 through 2056
  2. Coupons range from 4.850% (2029 Notes) to 6.375% (2056 Notes); issue prices range from 99.660% to 99.936% of par
  3. Net proceeds, plus borrowings under a $1.5 billion senior unsecured term loan, will fund cash consideration for the Lhoist North America, Inc. acquisition
  4. Underwriting agreement dated August 11, 2026 with Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, Deutsche Bank Securities Inc. and Truist Securities, Inc. as representatives
  5. Closing expected in the third quarter of 2026, subject to customary closing conditions
  6. Interest payments are semiannual, beginning January 30, 2027 for the 2032 and 2034 Notes and February 15, 2027 for the 2029, 2036 and 2056 Notes
  7. Notes sold under an effective Form S-3 shelf registration statement

Frequently Asked Questions

  1. How much debt did Martin Marietta price in this offering?

    The filing states the Company priced five series of senior notes totaling $5.5 billion in aggregate principal: $750 million due 2029, $1.25 billion due 2032, $1.0 billion due 2034, $1.5 billion due 2036, and $1.0 billion due 2056.

  2. What is the purpose of the offering?

    According to the press release furnished as Exhibit 99.1, the net proceeds, together with borrowings under a $1.5 billion senior unsecured term loan facility, will be used to pay the cash consideration for the previously announced acquisition of all outstanding equity interests in Lhoist North America, Inc.

  3. When is the offering expected to close?

    The closing is expected to occur in the third quarter of 2026, subject to the satisfaction of customary closing conditions.

  4. What are the interest rates and maturity dates of the notes?

    The 2029 Notes carry a 4.850% rate and mature August 15, 2029; the 2032 Notes carry 5.200% and mature January 30, 2032; the 2034 Notes carry 5.400% and mature January 30, 2034; the 2036 Notes carry 5.625% and mature August 15, 2036; and the 2056 Notes carry 6.375% and mature August 15, 2056.

  5. Who are the underwriters for the offering?

    Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, Deutsche Bank Securities Inc. and Truist Securities, Inc. serve as underwriters and joint book-running managers for the offering, as representatives of the several underwriters named in the Underwriting Agreement.