Thomson Reuters completed the acquisition of Additive.

Thomson Reuters, a technology and content company focused on legal, tax, and accounting services, completed the acquisition of Additive, a San Francisco-based startup founded in 2023 that builds AI tools to automate the ingestion and parsing of tax documents. Financial terms were not disclosed. “From day one, our mission at Additive has been to remove the friction that keeps tax and accounting professionals from doing their best work,” Dwight Crow, Additive Founder and CEO.