Sea more than doubled its annual profits in 2025, as the Southeast Asian tech giant reported strong performance in its fintech division and expansion in new markets like Brazil. Yet concerns about profitability sent the company’s shares into their worst drop in two years. The Singapore company posted full-year revenue of $22.9 billion, a 36.4% increase from the previous year. Net profits also rose by almost 260%, from $447.8 million to $1.6 bill…