London-based ClientEarth brought the suit against the European Commission, the EU’s cabinet body, after the commission refused to hand over the information and said doing so would harm the negotiating position of the EU in ongoing trade negotiations.

The EU’s second-highest court, the European General Court, already sided with the commission, ruling in 2018 that ClientEarth wasn’t entitled to the information. The bloc’s top court, the European Court of Justice, upheld that decision Thursday.