Azul and Gol , two of Brazil's largest airlines, are moving a step closer to a sweeping merger that would create a dominant carrier in Latin America's No. 1 economy, a securities filing showed on Wednesday.

Brazil airlines Azul and GOL are set for merger talks which could create the dominant player in aviation in the country. They signed a MoU after getting tentative approval from Brazilian President Lula da Silva. The plan is to combine the businesses of Azul and GOL parent Abra. It would give the new business a 60% share of the aviation market.

Abra—which also controls Colombia’s flag carrier Avianca—and Azul concluded the two Brazilian airlines have 90% complimentary and non-overlapping routes. Last year, amid reports that Azul was interested in merging with its rival GOL, the airlines launched a domestic codeshare.

Azul and Gol shares rose sharply on Thursday, following the announcement of a proposed merger between the two Brazilian airlines. Azul’s stock price rose by more than 4%, while Gol’s shares jumped by about 8%.

Azul (NYSE:AZUL) and Abra, the majority investor of Gol and Avianca, signed an agreement to combine their businesses in Brazil. The purpose of the business combination is to promote growth in the Brazilian aviation industry,