Toronto-based Blue J, a provider of AI-powered tax research software, has secured $122 million in a Series D funding round. The round was led by Oak HC/FT and Sapphire Ventures, valuing the company at over $300 million. Blue J plans to use the new capital to expand its team, accelerate product development, and broaden its market reach. This significant investment underscores the growing importance of AI in the legal and financial sectors, and Blue J's position as a leader in this space.