In 2025, U.S. startups saw a record 70% of their funding directed to rounds of $100 million or more, totaling approximately $157 billion across over 300 deals. This surge is driven largely by AI-related companies, with OpenAI’s massive $40 billion financing alone accounting for about a quarter of these investments. While 2021 still holds the record for the highest dollar amount in funding, attributed to a booming IPO market and high investor enthusiasm, 2025 is notable for its concentrated investment in AI giants. Globally, around 60% of startup funding has also focused on these mega rounds this year. The phenomenon reflects both a specific tech cycle around generative AI and a broader investor trend toward backing fewer, highly promising companies with larger checks to secure competitive stakes.
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