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The Week’s 10 Biggest Funding Rounds: Space Tech, AI Infrastructure Lead Fundraises

news.crunchbase.com·Mar 6, 2026

The first week of March saw significant startup funding activity, with notable deals including $550 million for Sierra Space in space tech and $500 million each for Ayar Labs in AI infrastructure and Vast in space tech, among others across various sectors like healthcare and e-commerce.

The first week of March saw significant funding activity, particularly in space tech and AI infrastructure, with notable investments including Sierra Space's $550 million round, valuing the company at $8 billion. This indicates a strong investor interest in these sectors, suggesting potential opportunities for startups in space-related technologies and AI infrastructure to secure substantial funding, especially if they can demonstrate clear value propositions.

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