The United Automobile Workers union reached a tentative agreement on a new labor contract with Stellantis, the parent company of Chrysler, Jeep and Ram, on Saturday, a person familiar with the matter said on Saturday.

The agreement comes three days after the union and Ford Motor announced a tentative agreement on a new contract. The two deals contain many of the same or similar terms, including a 25 percent general wage increase for U.A.W. members as well as the possibility for cost-of-living wage adjustments if inflation flares.

The tentative agreement with Stellantis will require approval by a union council that oversees negotiations with the company, and then ratification by U.A.W. members.

The deal with Stellantis means that only General Motors has not yet reached an agreement with the U.A.W.

The union’s contracts with the three automakers expired on Sept. 15. Since then, the union has called on more than 45,000 autoworkers at the three companies to walk off the job at factories and at 38 spare-parts warehouses across the country.

The most recent escalation of the strike at Stellantis came on Monday when the U.A.W. told workers to go on strike at a Ram plant in Sterling Heights, Mich., that makes the popular 1500 pickup truck. The strike has halted the production of Jeep Wranglers and Jeep Gladiators at a plant in Toledo, Ohio, and 20 Stellantis parts warehouses.

For decades, the union has negotiated similar contracts with all three automakers, a method known as pattern bargaining. Like the contract it hammered out with Ford, the tentative Stellantis deal would lift the top U.A.W. wage from $32 an hour to more than $40 over four and a half years. That would allow employees working 40 hours a week to earn about $84,000 a year.

Stellantis, G.M. and Ford began negotiating with the U.A.W. in July. The companies have sought to limit increases in labor costs because they already have higher labor costs than automakers like Tesla, Toyota and Honda that operate nonunion plants in the United States.

The three large U.S. automakers are also trying to control costs while investing tens of billions of dollars to develop new electric vehicles, build battery plants and retool factories.

Stellantis, which is based in Amsterdam, was created in 2021 by the merger of Fiat Chrysler and Peugeot, the French automaker. The company’s North American business, based near Detroit, is its most profitable.

Stellantis surprised analysts recently by posting much stronger profits than G.M., which is the largest U.S. automaker by sales. Stellantis earned 11 billion euros ($11.6 billion) in the first half of the year while G.M. made nearly $5 billion.

Noam Scheiber contributed reporting.