The Crunchbase Megadeals Board lists the week's top 10 announced funding rounds in the U.S. This week, only half of the top 10 rounds crossed the $100 million mark, which is usually unusual in this high-flying era for venture megarounds. Major investments included Amazon's $5 billion investment and partnership deal with Anthropic, which also includes an additional $20 billion in the future. Other notable rounds included Reliable Robotics raising $160 million in autonomous aircraft systems and Ray Therapeutics securing $125 million in Series B funding. The largest announced rounds were raised by U.K.-based companies for the period of April 182424.