This dataset consists of English-language chats involved in conspiracy discussions on Telegram. The data was collected using a snowball crawling technique that leverages message forwarding and linked chats, expanding from seed chats related to the QAnon conspiracy. This is part of a larger research project aimed at analyzing the spread and evolution of conspiracy theories in different cultural and linguistic contexts. The dataset covers the period from January 1, 2024, to February 20, 2024, and includes 641 chats containing a total of 5M messages.