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MLM · MINING & QUARRYING OF NONMETALLIC MINERALS (NO FUELS) · 8-K · Item 1.01 · Aug 12, 2026

The Lhoist deal now carries a $303.5 million annual bond coupon

Debt pricedpartly known
$5.5B notes at 4.85%-6.375%, plus $1.5B term loan for $7B cash payment
MARTIN MARIETTA MATERIALS INC (MLM) — AllSight decodes this SEC 8-K in plain English, versus what the market expected.

The financing was expected; the pricing and maturity mix are the new information. Martin Marietta had already announced the $13.5 billion Lhoist transaction, including $7 billion of cash consideration and $6.5 billion of stock, so arranging debt for the cash portion is not a surprise. The August 10 preliminary prospectus also made a financing announcement imminent, making this a partly known event rather than a clean surprise.

Financing pieceAmountCoupon / termsMaturity
2029 Notes$750 million4.850%August 15, 2029
2032 Notes$1.25 billion5.200%January 30, 2032
2034 Notes$1.00 billion5.400%January 30, 2034
2036 Notes$1.50 billion5.625%August 15, 2036
2056 Notes$1.00 billion6.375%August 15, 2056
Senior unsecured term loan$1.50 billionNot disclosedNot disclosed

The company has now locked in $7 billion of acquisition funding. The notes provide $5.5 billion of the cash needed for Lhoist, with the remaining $1.5 billion coming from a senior unsecured term loan (Use of Proceeds). The bond coupons imply roughly $303.5 million of annual interest before term-loan interest and fees, a meaningful new fixed cost.

The read is mixed because execution is complete, but the balance-sheet burden is now tangible. Pricing the bonds removes funding uncertainty and keeps the previously announced transaction on schedule for third-quarter 2026 closing (Use of Proceeds). But this filing does not provide a debt-spread comparison, revised leverage, updated accretion, or any improvement to the acquisition economics; the market already knew management expected leverage near 3.7x at closing and planned to reduce it below 2.5x within 24 months. The event therefore confirms the deal's financing rather than improving the underlying expectation.

Read the original 8-K on SEC EDGAR ↗
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