---
schema_version: "secwatch.filing_event.v1"
accession: "0000950157-26-000850"
form_type: "8-K"
ticker: "MLM"
cik: "0000916076"
company_name: "MARTIN MARIETTA MATERIALS INC"
filed_at: "2026-08-05T21:14:19+00:00"
generated_at: "2026-08-05T21:16:19.532309+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Martin Marietta receives all regulatory approvals for $13.5B Lhoist North America acquisition; Q3 2026 close expected

## Summary
- Received all necessary regulatory approvals for $13.5B acquisition of Lhoist North America (LNA).
- Transaction expected to close in Q3 2026, subject to customary closing conditions.
- Deal announced June 27, 2026; consideration is cash and Martin Marietta common stock.
- LNA produces lime, dolomitic lime, limestone, and aggregates in North America.

## SEC filing metadata
- accession: 0000950157-26-000850
- form_type: 8-K
- ticker: MLM
- cik: 0000916076
- company_name: MARTIN MARIETTA MATERIALS INC
- filed_at: 2026-08-05T21:14:19+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/916076/000095015726000850/0000950157-26-000850-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/916076/000095015726000850/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950157-26-000850
- JSON: https://secwatch.observer/filing/0000950157-26-000850.json
- Plain text: https://secwatch.observer/filing/0000950157-26-000850.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.