---
schema_version: "secwatch.filing_event.v1"
accession: "0000950157-22-001348"
form_type: "8-K"
ticker: "MLM"
cik: "0000916076"
company_name: "MARTIN MARIETTA MATERIALS INC"
filed_at: "2022-12-22T23:59:59+00:00"
generated_at: "2026-06-21T00:32:31.985622+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Martin Marietta extends $800M revolver maturity to Dec 2027; transitions to SOFR

## Summary
- Maturity extended one year from Dec 2026 to Dec 21, 2027 for $800M unsecured revolver.
- Interest rate benchmark replaced LIBOR with Adjusted Daily Simple SOFR plus 0.10%.
- Consent fee of 0.02% of extended commitments paid to each Extending Lender.
- Amendment effective December 22, 2022; all existing lenders participated as Extending Lenders.

## SEC filing metadata
- accession: 0000950157-22-001348
- form_type: 8-K
- ticker: MLM
- cik: 0000916076
- company_name: MARTIN MARIETTA MATERIALS INC
- filed_at: 2022-12-22T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/916076/000095015722001348/0000950157-22-001348-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/916076/000095015722001348/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950157-22-001348
- JSON: https://secwatch.observer/filing/0000950157-22-001348.json
- Plain text: https://secwatch.observer/filing/0000950157-22-001348.txt

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