DIAMOND MATERIALS LLC
- DOT
- 45597
- MC Docket
- 76472
- Authority
- PRIVATE PROPERTY;AUTHORIZED FOR HIRE · Hazmat
- Safety
- Conditional
About DIAMOND MATERIALS LLC
Diamond Materials Llc is a large fleet operator based in Wilmington, DE, registered with the FMCSA since 1974 (52 years). The carrier operates 139 power units and 117 drivers, placing it in the top 95th percentile of US for-hire carriers by fleet size. Operating authority: PRIVATE PROPERTY, AUTHORIZED FOR HIRE, with hazardous-materials endorsement. Reported 676,737 annual miles for 2025 — approximately 4,869 miles per power unit. Cargo carried includes chemicals, liquids and gases, building materials, drybulk, and garbage and refuse. FMCSA safety rating: Conditional (issued May 1988).
Browse other for-hire carriers based in DE, or see all FMCSA-registered carriers.
Fleet & operations
- Power units
- 139
- Drivers
- 117
- Annual miles
- 676,737
136 straight trucks
reported for 2025
Cargo carried
Equipment owned
- Truck
- 117
- Tractor
- 19
- Trailer
- 35
Other carriers in DE
Data sourced from FMCSA Company Census (public domain). Last refreshed May 4, 2026. MCS-150 last updated Jul 2025. Safety rating issued May 1988.