---
schema_version: "secwatch.filing_event.v1"
accession: "0000950157-25-000633"
form_type: "8-K"
ticker: "MLM"
cik: "0000916076"
company_name: "MARTIN MARIETTA MATERIALS INC"
filed_at: "2025-08-07T23:59:59+00:00"
generated_at: "2026-05-17T18:45:40.377882+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Martin Marietta swaps cement assets for Quikrete aggregates and $450M cash

## Summary
- Martin Marietta transfers its Midlothian cement plant and North Texas ready-mix concrete operations to Quikrete.
- Martin Marietta receives Quikrete's aggregates operations in Virginia, Missouri, Kansas, and Western Canada plus $450M.
- Closing conditioned on HSR and Canadian Competition Act approvals; outside date August 3, 2026 (3-month extension possible).
- Exchange includes customary reps, warranties, covenants, non-compete, and indemnification provisions.

## SEC filing metadata
- accession: 0000950157-25-000633
- form_type: 8-K
- ticker: MLM
- cik: 0000916076
- company_name: MARTIN MARIETTA MATERIALS INC
- filed_at: 2025-08-07T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/916076/000095015725000633/0000950157-25-000633-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/916076/000095015725000633/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950157-25-000633
- JSON: https://secwatch.observer/filing/0000950157-25-000633.json
- Plain text: https://secwatch.observer/filing/0000950157-25-000633.txt

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