Oi, also known as Oi S.A., a publicly owned company headquartered in Brazil, was founded in 1998 and employs approximately 19,860 individuals. As a subsidiary of Mileto Tecnologia, it reported $592.5M in revenue as of 2024 and functions as a tier 1 media tech buyer. The company specializes in telecoms and was formally known as Telemar.
S&P Global Ratings discontinued its ratings on Oi S.A. on March 11, 2026, following a downgrade to 'D' after the company missed an interest payment on its 2026 senior secured notes due in January. Previously, on January 28, 2026, the Public Ministry of the State of Rio de Janeiro advocated for Oi S.A. to pay approximately R$53.9 million in severance to 1,741 workers of Serede – Serviços de Rede S.A., a recommendation filed during Oi's judicial recovery process. This followed Oi obtaining access to R$517.4 million on November 28, 2025, after reaching an agreement with the agency Anatel. Earlier, on November 26, 2025, Pacific Investment Management Company (Pimco) sold its entire stake in Oi S.A., divesting 64,811,440 common shares that represented 19.73% of the company’s total capital, amid a protracted situation involving the Brazilian telecom operator and its creditors.
Oi offers 5 products in the media and telecoms services industry. Oi's product portfolio comprises of media and TV services and telecoms.
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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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