Workers at Brazilian planemaker Embraer gather as they start a strike during an assembly in Sao Jose dos Campos, Brazil September 17, 2025. REUTERS/Roosevelt Cassio

By Gabriel Araujo and Alberto Alerigi

SAO PAULO (Reuters) - Planemaker Embraer said on Wednesday that its plants in Brazil were operating normally after a union representing metalworkers announced a strike for an indefinite period of time, demanding higher salaries.

The metalworkers union from Sao Jose dos Campos, where Embraer's headquarters and main production lines for commercial jets are located, said earlier they went on strike due to the firm's "refusal to apply a real increase to wages".

The move comes at a time when the company seeks to boost production to meet its annual goals, as the second half is usually busier for planemakers.

Embraer had delivered 26 commercial jets by end-June, from a full-year target of 77 to 85. The firm played down the impact of the move, saying that operations at its plants in Brazil were not disrupted.

Shares in the planemaker were down 1.3% in Sao Paulo trading, while benchmark stock index Bovespa rose 0.8%.

According to the Sindmetal union, Fiesp - the entity representing the aerospace sector - proposed in negotiations a salary adjustment only based on inflation and a reduction in job stability for injured workers and those with occupational diseases.

That proposal was rejected last week and a strike notice was approved, the union said in a statement, adding that the offer was for a 5.05% wage increase while workers demanded an 11% rise.

In a separate statement, Embraer said it was surprised by the union's action as negotiations were still ongoing.

"The union has not yet presented the latest proposal to the workers," it said, adding that a 5.5% salary adjustment had been offered by Fiesp on Tuesday.

The world's third-largest planemaker, whose shares reached an all-time high earlier this year, has been riding tailwinds on the back of robust demand for its jets.

"The factory is breaking profitability, revenue and order backlog records. Now it's time to share these results with those on the production line," union director Herbert Claros said.

(Reporting by Gabriel Araujo and Alberto Alerigi Jr.; Writing by Isabel Teles; Editing by Aida Pelaez-Fernandez, Mark Potter and Ed Osmond)