---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-052805"
form_type: "8-K"
ticker: "MLM"
cik: "0000916076"
company_name: "MARTIN MARIETTA MATERIALS INC"
filed_at: "2024-05-03T23:59:59+00:00"
generated_at: "2026-06-02T23:39:34.641591+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Martin Marietta receives MSHA 107(a) order at Red Canyon Quarry over fall-protection violation

## Summary
- On May 1, 2024, MSHA issued a 107(a) order at Martin Marietta's Red Canyon Quarry in Colorado Springs, CO.
- A truck driver sat on the trailer edge without fall protection, violating company policies and exposing him to fall risk.
- Corrective action was taken immediately; no injuries occurred and the order has been terminated.

## SEC filing metadata
- accession: 0000950170-24-052805
- form_type: 8-K
- ticker: MLM
- cik: 0000916076
- company_name: MARTIN MARIETTA MATERIALS INC
- filed_at: 2024-05-03T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 1.04
- EDGAR index: https://www.sec.gov/Archives/edgar/data/916076/000095017024052805/0000950170-24-052805-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/916076/000095017024052805/mlm-20240501.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-052805
- JSON: https://secwatch.observer/filing/0000950170-24-052805.json
- Plain text: https://secwatch.observer/filing/0000950170-24-052805.txt

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