Thomson Reuters

Legal research company ROSS Intelligence says it will petition the US Supreme Court to review a Third Circuit ruling in favor of Thomson Reuters. The case centers on whether ROSS's use of Thomson Reuters' headnotes and key numbering system to train its AI legal research tool constituted copyright infringement, a dispute closely watched across the legal tech industry.

A newly unsealed court opinion lays out the reasoning behind Thomson Reuters' victory in a closely watched copyright and fair-use lawsuit against an AI company over the use of its legal research content. The ruling is being read as one of the first major judicial assessments of how fair-use doctrine applies to training data for artificial intelligence systems.

Thomson Reuters and private equity firm KKR have completed a joint venture covering Thomson Reuters' global print business. The deal finalizes the transfer of the print operations into a partnership structure, marking a further step in the company's shift away from print publishing toward digital, data-driven services. Further details of the arrangement have not been widely reported.

The US Court of Appeals for the Third Circuit has affirmed a revised ruling finding that ROSS Intelligence's AI legal research platform was not protected by fair use, in a decision issued under seal. The long-running copyright dispute with Thomson Reuters over the use of legal headnotes to train AI tools remains a closely watched test case for the AI industry.

A US federal appeals court has ruled in favour of Thomson Reuters in its copyright lawsuit against legal research startup ROSS Intelligence. The Third Circuit's decision marks a significant development in the long-running dispute over whether ROSS unlawfully copied content from Thomson Reuters' Westlaw legal research database to build its competing AI-powered legal search product, with implications for copyright law and AI training data.

Thomson Reuters has introduced Thomson, a large language model built by the company itself. The announcement was made through the company's legal solutions division, positioning Thomson as a purpose-built tool for the legal industry. Details on capabilities and availability are so far limited, and reaction beyond the company's own channels remains minimal.