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Mergers & AcquisitionsMedium•29 June 2026•

1 min read

Martin Marietta to Acquire Lhoist North America in $13.5B Deal

Key Facts

1Martin Marietta announced a definitive agreement to merge with Lhoist North America in a cash-and-stock deal valued at $13.5 billion including debt.

2The deal will be financed with $7 billion in cash and $6.5 billion in shares, with the Berghmans family owning roughly 15% of the combined entity.

Continuing the consolidation wave in building materials, Martin Marietta (MLM) has announced a definitive agreement to merge with Lhoist North America in a cash-and-stock deal valued at $13.5 billion including debt. The transaction will be financed with $7 billion in cash and $6.5 billion in stock, with the Berghmans family, owner of Lhoist, receiving approximately 15% of the combined entity. The deal is expected to close in the second half of 2026, subject to regulatory approvals.

The acquisition strategically expands Martin Marietta's presence in the construction aggregates market, particularly in limestone supply across North America. Per market data, MLM closed at $616.06 on June 26, 2026, recovering from an intraday low of $610.96. The deal comes amid a broader M&A push in the sector as companies seek geographic diversification and scale benefits from rising infrastructure spending.

MLM currently trades at $616.06 (close June 26), with resistance near the session high of $628.94. No major economic catalysts are imminent on the calendar, but investors will focus on regulatory progress toward the H2 2026 closing. A sustained move above $620 could signal near-term upside momentum.