DETROIT — Stellantis‘ U.S. new vehicle sales continued a yearslong free fall during the third quarter, despite CEO Carlos Tavares’ attempts to correct what he has called “arrogant” mistakes.

The trans-Atlantic carmaker reported U.S. sales Wednesday of 305,294 from July through September, a 19.8% decline from the third quarter of 2023 and an 11.5% decrease from the prior three months of this year.

Stellantis was expected to be the worst sales performer of major automakers during the third quarter. Auto industry forecaster Cox Automotive had projected a sales decline of roughly 21% for the carmaker.

Cox and fellow forecaster Edmunds expect third-quarter sales industrywide will be down roughly 2% compared with a year earlier.

Still, Stellantis said its initiatives to boost sales and correct past mistakes are starting to pay off. The automaker cited a market share increase during the third quarter from 7.2% to 8% as well as an 11.6% reduction in its U.S. vehicle inventory.

“We continue to take the necessary actions to drive sales and prepare our dealer network and consumers for the arrival of 2025 models,” Matt Thompson, Stellantis head of U.S. retail sales, said in a release.

All of Stellantis’ brands except for its niche Fiat unit experienced sales declines in the third quarter, led by more than 40% reductions for Chrysler and Dodge. Its Ram truck brand recorded a roughly 19% fall, while Jeep was off about 6% year over year.

Stellantis’ third-quarter sales are the latest problem this week for the carmaker, which cut its 2024 profit margin forecast and has been hit with a recall involving popular plug-in hybrid electric Jeep models due to fire risks.

Shares of the company on the New York Stock Exchange are off 41% this year. The stock hit a new 52-week low Tuesday and closed at $13.71, falling 2.4% for the day.

During a June investor event, Tavares said the company would correct “arrogant” mistakes made by himself and the company in the automaker’s U.S. operations that led to sales declines, bloated inventories and investor concerns.

He said the convergence of three factors led to the problems: not selling down vehicle inventory fast enough; manufacturing issues, specifically with two unnamed plants; and a lack of “sophistication in the way to go to market.”

U.S. sales for Stellantis, formerly Fiat Chrysler, have declined every year since a recent peak of 2.2 million in 2018. The company sold more than 1.5 million vehicles last year, a roughly 1% decline from 2022, when it reported a significant drop of 13% compared with the previous year.

Stellantis’ performance compares with the overall U.S. new light-duty vehicle sales market, which increased 13% last year, according to federal data.

Tavares has been on a profit-driven, cost-cutting mission since the company was formed through a merger between Fiat Chrysler and France’s PSA Groupe in January 2021.

He has prioritized profits and vehicle pricing over market share, leading to heavy criticism from the United Auto Workers union and Stellantis’ U.S. franchised dealers.

Correction: Stellantis reported U.S. sales Wednesday. An earlier version misstated the day.