FMCSA Carrier Profile
GRUBB LUMBER COMPANY INC
Owner / Officer: Adam Zentz
Active
Conditional
Authority
No Active Authority
Common carrier
Insurance
Not Found
No coverage amount on file
Safety
Conditional
0th pct · 23 inspections on record
✓ No risk flags found on authority or insurance records
Vetting Notes
GRUBB LUMBER COMPANY INC is an active FMCSA-registered motor carrier based in Wilmington, Delaware, operating under DOT 33524. No high-severity flags were found on authority or insurance records. Across 23 FMCSA inspections on record, this carrier shows 50.0% vehicle OOS and 0.0% driver OOS. Authority and safety history are clean as of this page's last update.
FMCSA Registration
DOT Number
33524
Operating Status
Active
Safety Rating
Conditional
Entity Type
Corporation
MCS-150 Filed
March 3, 2026
FMCSA Registration
June 1, 1974
Annual Mileage
350,000 mi (2025)
Contact Information
Address
200 A Street, Wilmington, DE 19801-5221
Phone
Email
Owner / Officer
Adam Zentz
Officer 2
David Arronson
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Safety Percentile
0th percentile
vs. peer carriers
✓ Below FMCSA alert threshold (65th pct) · lower percentile = fewer violations than peers · source: FMCSA SMS
Safety & Inspection Summary
Total Inspections
23
Driver Inspections
13
Vehicle Inspections
12
Total OOS Orders
6
Violations by Category
Vehicle Maintenance10
Unsafe Driving4
Hours of Service0
OOS Rates vs. National Average
Driver OOS Rate0.0% · national avg 5.5%
✓ Below national average
Vehicle OOS Rate50.0% · national avg 20.7%
⚠ Above national average (29.3pp higher)
Inspection Trend by Year
2026
2025
2024
Inspection Records (23)
| Date | State | Level | Vehicle | Viol. | Status |
|---|---|---|---|---|---|
| December 31, 2024 | PA | Level III — Driver Only | HINO · 5PVNJ8JVXL4S75707 | 0 | Clean |
| April 29, 2026 | NJ | Level II — Walk-Around | MACK · 1M2GR3GC9MM020893 | 1 | Passed |
| August 26, 2024 | MD | Level II — Walk-Around | MACK · 1M1PN4GY5LM006117 | 3 | 3 OOS |
| March 24, 2026 | PA | Level II — Walk-Around | FONTAINE T · 13N1482C3E1559912 | 1 | 1 OOS |
| July 24, 2024 | NJ | Level II — Walk-Around | MACK · 1M2GR3GC3MM024499 | 1 | Passed |
| March 22, 2024 | NJ | Level III — Driver Only | — | 0 | Clean |
| April 21, 2026 | NJ | Level III — Driver Only | MACK · 1M2GR3GC9MM020893 | 0 | Clean |
| October 20, 2025 | PA | Level I — Full | MACK · 1M2GR3GC3MM024499 | 0 | Clean |
| December 20, 2024 | NY | Level III — Driver Only | MACK · 1M2GR3GC1RM040675 | 0 | Clean |
| November 19, 2024 | DE | Level III — Driver Only | MACK · 1M2GR3GC9MM020893 | 1 | Passed |
| June 19, 2025 | DE | Level III — Driver Only | HINO · 5PVNJ8JV8J4S69238 | 0 | Clean |
| June 16, 2025 | MD | Level III — Driver Only | MACK · 1M2GR3GC3MM024499 | 0 | Clean |
Showing 12 of 23 inspection records
Other Carriers in Wilmington, DE
Data sourced from FMCSA MCMIS via Socrata. Last updated: August 2, 2026.
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