UPDATE 3-Martin Marietta to buy Lhoist North America in $13.5 billion deal

Martin Marietta Materials, Inc.

Martin Marietta Materials, Inc.

MLM

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Martin Marietta to fund the deal with $7 billion cash and $6.5 billion in shares

The Berghmans family would own roughly 15% of Martin Marietta after deal closes

The transaction would add 2 billion tons of limestone reserves in Sun Belt corridors

Adds details and background throughout

- Martin Marietta Materials MLM.N said on Monday it would merge with limestone supplier Lhoist North America in a cash-and-stock deal worth $13.5 billion, as the building material firm looks to tap growing demand for lime products.

Shares of the Raleigh, North Carolina-based company were down about 3% in premarket trade.

Martin Marietta will use a mix of $7 billion in cash along with shares valued at $6.5 billion to fund the deal, the company said. It expects to realize about $85 million in annual run-rate cost synergies.

Martin Marietta CEO Ward Nye said demand for high-quality lime products is expected to remain resilient for decades to come, due to investment in infrastructure, advanced manufacturing, energy development and industrial expansion in the U.S.

There has been a surge in dealmaking in the U.S. building-products industry as the data center construction business booms, along with new housing, repairs and renovations.

Last week, Ireland's CRH CRH.N said it would acquire Arcosa ACA.N in an all-cash deal valued at about $8.5 billion, in a bid to capitalize on rising demand for U.S. energy and utility infrastructure.

Lhoist's Berghmans family - which owns the privately held Lhoist Group, a Belgian industrial company - would own roughly 15% of Martin Marietta upon the deal's close.

The transaction would add quarries, production facilities, distribution terminals and 2 billion tons of limestone reserves in Sun Belt metropolitan corridors to Martin Marietta's portfolio.

Lhoist North America makes hi-calcium lime, dolomitic lime and industrial mineral products used in domestic steel manufacturing, infrastructure and heavy non-residential construction across North America.

The deal is expected to be completed in the second half of 2026, subject to regulatory approvals.