Form 8-K · Current Report · Filed 2026-06-29
Martin Marietta to Acquire Lhoist North America in $13.5 Billion Deal
Martin Marietta Materials, Inc. announced on June 29, 2026, its agreement to acquire Lhoist North America, Inc. for $13.5 billion in cash and shares. This transaction, expected to close in the second half of 2026, will make Martin Marietta the leading national producer of lime solutions. The acquisition is anticipated to be accretive to earnings and margins in the first year following closing, with expected annual run-rate cost synergies of approximately $85 million. The deal is subject to regulatory approvals.
- Filer
- Martin Marietta Materials Inc. MLM · NYSE
- Filed
- Accession
- 0000950157-26-000758
- CIK
- 0000916076
- Signal
- High impactBasic Materials
- Source
- Official filing on sec.gov ↗
Items reported
Reported Item
Market reaction
Close before filing
$616.06
Next session
-6.4%
Since filing
-14.8%
Latest close
$525.14
What happened, not what will happen — closing prices around the filing date.
Precedent
Previous filings from MLM reporting the same item, with the next session's move:
Insider tape
Within 45 days of this filing, MLM insiders reported 3 Form 4 transactions — net buying of $110K.
About Martin Marietta Materials Inc.
Martin Marietta Materials Inc. is a leading supplier of building materials, primarily aggregates like crushed stone, sand, and gravel, as well as cement and concrete products in the United States. Its primary purpose is to support the construction industry by providing essential raw materials used in infrastructure projects, commercial and residential construction, and the development of public works like roads, bridges, and airports. Martin Marietta Materials is heavily involved in sectors such as construction, transportation, and energy, where its products are critical for foundational building and maintenance. The company plays a significant role in regional and national economic development, given the essential nature of its offerings in the construction and infrastructure sectors. With a broad geographic footprint and a diverse product line, Martin Marietta Materials holds a strategic position within the market, contributing to the durability and growth of urban and rural communities alike.
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