M12, Microsoft's corporate venture capital fund, invests in early-stage companies in key sectors like cybersecurity and space tech. With check sizes ranging from $500,000 to $10,000,000, M12 primarily focuses on seed and series A stages. They have backed companies like Definely, Blackshark.ai, and Authomize. M12 aims to support the next generation of tech pioneers by partnering with promising startups.