["Nations and Nationalism, Volume 28, Issue 3, Page 1061-1079, July 2022. ", "\nAbstract\nOver the years, literature studying stateless diaspora formation through a transborder social movement studies approach is growing. The recent rise of Hong Kong diaspora provides an emerging case of stateless diaspora that introduces new empirical insights into the scholarly literature. Using a mixed‐method research strategy, this study empirically investigates the formation of the Hong Kong diaspora as a ‘historically contingent process’, through which overseas Hongkongers were mobilised during the 2019–20 Anti‐Extradition Bill Movement (critical event) to join global protests (mobilising practices) by diaspora groups and activists (mobilising agents). Achieved transborder outreach across the Global North by mobilising their strong moral and cultural resources, it remains to be seen whether the emerging Hong Kong diaspora will move towards a full‐fledged, sustained identity‐based movement. The case study of Hong Kong diaspora offers new comparative insights and establishes a mixed‐method analytical framework for comparing stateless diaspora worldwide.\n"]