---
schema_version: "secwatch.filing_event.v1"
accession: "0000950157-26-000922"
form_type: "8-K"
ticker: "MLM"
cik: "0000916076"
company_name: "MARTIN MARIETTA MATERIALS INC"
filed_at: "2026-08-18T21:00:23+00:00"
generated_at: "2026-08-18T21:02:15.014205+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Martin Marietta enters $1.5B five-year revolving credit facility, replacing 2021 agreement

## Summary
- New $1.5B senior unsecured revolving facility dated Aug 18, 2026, expires Aug 18, 2031.
- Replaces Dec 21, 2021 credit agreement; no borrowings were outstanding under the prior facility.
- Leverage ratio covenant max 3.75:1.00; rises to 4.75:1.00 for first 3 quarters after Lhoist North America acquisition closes.
- Interest at Term SOFR or base rate plus ratings-based margin; cash up to $500M offsets debt in leverage calculation.
- Facility supports previously announced acquisition of Lhoist North America, Inc.

## SEC filing metadata
- accession: 0000950157-26-000922
- form_type: 8-K
- ticker: MLM
- cik: 0000916076
- company_name: MARTIN MARIETTA MATERIALS INC
- filed_at: 2026-08-18T21:00:23+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 1.01, 1.02, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/916076/000095015726000922/0000950157-26-000922-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/916076/000095015726000922/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950157-26-000922
- JSON: https://secwatch.observer/filing/0000950157-26-000922.json
- Plain text: https://secwatch.observer/filing/0000950157-26-000922.txt

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