The Weekly Notable Startup Funding Report reveals a vibrant funding landscape across the US for the week ending March 29, 2025. Notable investments include Underdog Fantasy, which raised $70 million for its fantasy sports platform, and HeartFlow, which secured $98 million for its cardiovascular disease technology. Other highlighted companies include Sunday, a subscription lawn care service that raised $25 million, and Island, an enterprise browser startup that garnered $250 million, reflecting significant investor interest and a total of $1.57 billion in funding across diverse sectors.
Underdog Fantasy, an online daily fantasy sports platform, has now raised a total of $115.0M in total equity funding and is backed by Spark Capital.
HeartFlow, a medical technology company, focuses on the diagnosis and treatment of cardiovascular disease and has secured $782.7M in total equity funding.
Island, offering a secure enterprise browser, has raised a total of $810.0M in equity funding, driven by various prominent investors.
Boulder-based Sunday, a subscription lawn care service, emphasizes environmentally responsible solutions and has raised $103.0M total in equity funding.
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