Yttrium is a venture capital fund that rebranded from Digital+ Partners to focus specifically on growth-stage B2B technology companies in Europe, backing businesses in areas like autonomous driving, aviation fuel infrastructure, cybersecurity, and logistics software rather than general startups or consumer apps. It positions itself as a growth-equity specialist that helps companies scale beyond the early venture stage, often serving as the first institutional investor for profitable, capital-efficient companies, while also building internal tools and data/AI systems to support its portfolio and investment decisions.