Updated May 2026
Best Owner-Operator Companies in Diamond Bar, California (May 2026)
There are 219 owner-operator carriers currently posting jobs in Diamond Bar, California. The ranking below reflects active jobs as of May 2026, not historical pay surveys. Zmile Inc leads with an average gross weekly revenue of $3,233. AD EXPRESS TRUCKING LLC follows at $2,525/week gross. California freight is dominated by the Port of LA / Long Beach complex, Central Valley agriculture, and the Inland Empire warehouse cluster along I-10 and I-15.
What changed in May 2026
We just started tracking monthly changes for this view. Check back next month to see how rankings have shifted.
Diamond Bar, California's top owner-operator carriers right now
The top of the list is Zmile Inc at $3,233/week. A few names below the top earn more on a weekly-pay basis but rank lower on the composite.
#1Zmile Inc — $3,233/wk
Zmile Inc leads the Diamond Bar, California market on combined gross revenue and ranking score this month. Top FMCSA dimension here is hours-of-service compliance, in the 98th percentile. The carrier tracks as a responsive employer on Lanefinder's data.
#2AD EXPRESS TRUCKING LLC — $2,525/wk
Lanefinder's application data flags AD EXPRESS TRUCKING LLC as a responsive employer. AD EXPRESS TRUCKING LLC guarantees weekly pay — useful when freight slows down.
AD EXPRESS TRUCKING LLC is the only Diamond Bar, California top-10 carrier that guarantees weekly pay regardless of miles run.
#3TAZ TRUCKING INC — $10,999/wk
TAZ TRUCKING INC pays above the 93rd percentile on gross weekly revenue for the Diamond Bar, California market. TAZ TRUCKING INC's top FMCSA dimension is driver fitness, in the 83rd percentile.
TAZ TRUCKING INC actually pays more weekly than the top-ranked carrier — $10,999/week.
Also in the top 10: #4 D-LINE TRUCKING INC at $5,750/wk, #5 IKKO LOGISTICS LLC at $8,250/wk, #6 Rickman Transport, LLC at $9,250/wk, #7 Ali Star Inc at $10,000/wk, #8 INLAND EMPIRE LLC at $7,875/wk, #9 GNS TRUCKING INC at $9,000/wk, #10 BLUE LIGHTNING LOGISTICS at $7,000/wk.
How drivers spend their time on the road in Diamond Bar, California
Of active CDL postings in Diamond Bar, California this month, 10% are regional and 82% are OTR (long-haul). Local and semi-local routes account for the remaining 8%.
Across Diamond Bar, California CDL postings: 2% with guaranteed pay, 38% dedicated, 84% take-truck-home, 69% pet-friendly, 67% riders-allowed.
Where Diamond Bar, California differs from the California baseline
Diamond Bar, California's biggest divergence from California is on average weekly pay, 14% above the state baseline.
Driving CDL in California
California is one of the toughest states to drive CDL in the country, and one of the most lucrative for the right setup. CARB clean-truck enforcement is the most aggressive in the US, so newer equipment is effectively required for fleet work — if you're owner-op, plan the truck purchase around it. Drayage out of LA / Long Beach and warehouse-rotation work in the Inland Empire pay near the top of the national scale, but cost of living is brutal. The mountain passes (Cajon, Grapevine, Donner) add real winter complexity that most other Southwest lanes don't. Drivers with serious mountain experience earn it back.
Related guides
- Best trucking companies in Diamond Bar, California
- CDL driver salary in Diamond Bar, California
- Best owner-operator companies in California
How we compile these rankings
The composite score is 30% compensation, 25% FMCSA safety, 25% benefits, and 20% operational performance. Pay percentiles are computed against carriers currently hiring in each market; FMCSA percentiles come from SAFER and weight unsafe-driving and hours-of-service violations 2× heavier than the other three dimensions. Updated May 2026.