Key Takeaways
- Among 13 major automakers analyzed by Cox Automotive, GM and Ford experienced the sharpest U.S. market share losses in 2026.
- Through the first nine months of the year, Ford’s vehicle deliveries are forecast to decline 8.8%, reducing its market share to 12.5%.
- General Motors is expected to see a 6.2% year-to-date sales decrease, with market share falling from 17.4% to 16.7%.
- For the first time in history, the combined sales of Hyundai and Kia are on track to exceed Ford’s during Q3.
- Tesla faces an 18.9% year-to-date sales decline, with market share contracting from 3.7% to 3.0%.
America’s traditional automotive giants, General Motors and Ford Motor Company, are experiencing the most significant US market share erosion across the industry in 2026, according to fresh projections from Cox Automotive published this Thursday.
Cox Automotive’s analysis examined 13 major automobile manufacturers. The data revealed that GM and Ford suffered the most dramatic market position weakening.
By the end of September 2026, Ford is anticipated to see vehicle deliveries contract by 8.8%. This downturn will likely reduce the company’s market share to 12.5%, representing a decline of almost one full percentage point.
General Motors faces a similar trajectory. Cox’s analysis indicates GM’s domestic sales will decrease 6.2% on a year-to-date basis through the third quarter.
The research firm anticipates GM will close Q3 holding a 16.7% market share, down notably from the 17.4% captured during the same period last year.
Historic Low for Detroit’s Big Three
Stellantis, which owns the Chrysler brand, stands as the outlier among Detroit’s traditional automakers. Cox forecasts Stellantis will actually expand its market presence through the third quarter.
However, when viewed collectively, the market share held by GM, Ford, and Stellantis is projected to reach an unprecedented low of approximately 36%.
Charlie Chesbrough, an economist with Cox, noted that Asian automotive brands are anticipated to capture over half of all new vehicle sales in the United States for the second consecutive quarter. This performance would match near-record market share heights for Asian manufacturers.
Industry observers cite the absence of fuel-efficient vehicle options as a critical factor behind GM and Ford‘s current challenges. Escalating gasoline prices linked to the Iran conflict have accelerated consumer migration toward hybrid powertrains.
General Motors dealerships have reported instances where prospective buyers chose competing brands specifically because GM lacks hybrid offerings in its lineup. Meanwhile, Ford eliminated its Escape compact SUV from production, removing one of its most economical vehicles.
Ford’s performance was additionally hampered by reduced pickup truck manufacturing capacity. A fire at a key aluminum parts supplier disrupted production volumes during the first half of the year.
South Korean Brands Poised for Historic Milestone
The combined third-quarter sales volume for Hyundai and Kia is forecast to eclipse Ford’s total. According to Cox, this would mark the first occasion in which these two South Korean manufacturers have collectively outsold Ford during any three-month period.
Ford contested this characterization in an official statement. The company emphasized that on a year-to-date basis, Ford still leads the combined Hyundai-Kia total in both unit sales and revenue generation, with the revenue advantage being particularly substantial.
Toyota is projected to register a modest 1.1% sales increase through nine months. Honda’s deliveries are expected to climb 5.6% over the same timeframe.
Tesla’s performance tells a distinctly different story. Cox estimates Tesla’s year-to-date sales will plummet 18.9% compared to the prior year period.
This decline would compress Tesla’s market share to 3.0%, down from the 3.7% recorded previously.
While individual manufacturers face varying fortunes, Cox elevated its overall U.S. vehicle sales projection for 2026. The firm now anticipates total industry sales of 16.1 million units, revised upward from a previous forecast of 15.8 million.
Erin Keating, executive analyst at Cox, observed that the broader automotive market has maintained stability throughout 2026 despite significant company-level fluctuations. She highlighted that Asian manufacturers offering comprehensive hybrid portfolios are capturing share at an accelerating pace.
Official third-quarter results will be confirmed once all automakers complete their reporting for the period ending September 30, 2026.
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