Stormontgate is the name given to the controversy surrounding an alleged Provisional Irish Republican Army spy ring and intelligence-gathering operation based in Stormont, the parliament building of Northern Ireland. The term was coined in October 2002 after the arrest of Sinn Féin's Northern Ireland Assembly group administrator Denis Donaldson, his son-in-law Ciarán Kearney, and former porter William Mackessy for intelligence-gathering on 4 October 2002.