Oi, also known as Oi S.A., is a publicly owned company headquartered in Brazil and a subsidiary of Mileto Tecnologia. Founded in 1998, the company operates with approximately 19,860 employees and reported $592.5M in revenue as of 2024. As a tier 1 media tech buyer, it functions as a Brazilian telecoms operator, specializing in telecoms.
S&P Global Ratings discontinued its ratings on Oi S.A. on March 10, 2026, following the agency's downgrade of the company to 'D' after Oi missed an interest payment on its 2026 senior secured notes due in January. Earlier, on January 29, 2026, the Public Ministry of the State of Rio de Janeiro defended that Oi should bear approximately R$ 53.9 million for the severance pay of 1,741 workers of Serede – Serviços de Rede S.A., a manifestation filed in the company's judicial recovery process. This followed Oi obtaining access to R$ 517.4 million on November 28, 2025, after an agreement with the agency Anatel. Previously, on November 26, 2025, Pacific Investment Management Company (Pimco) sold its entire stake in Oi S.A., with funds managed and advised by Pimco divesting all 64,811,440 common shares, representing 19.73% of the company’s total capital.
Oi offers 5 products in the media and telecoms services industry. Oi's product portfolio comprises of telecoms and media and TV services.
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Oi's revenues were $592.5M in 2024. Caretta Research has split Oi's revenue into 5 different product categories, the largest of which is mobile services, which represents 33% of Oi's revenue.
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