Sigurður Ingi Jóhannsson in the context of "Panama Papers"

Sigmundur Davíð Gunnlaugsson ([ˈsɪɣmʏntʏr ˈtaːvið ˈkʏnlœyxˌsɔːn]; born 12 March 1975) is an Icelandic politician who was the prime minister of Iceland from May 2013 until April 2016. He was also chairman of the Progressive Party from 2009 to October 2016. He was elected to the Althing (Iceland's parliament) as the 8th member for the Reykjavík North Constituency on 25 April 2009. Taking office at 38, he was the third youngest Icelander to become prime minister.

Following the release of the Panama Papers, he announced on 5 April 2016 that he would resign as prime minister amid public outrage at him for owning an offshore company to shelter money and not disclosing that when entering parliament. On 7 April 2016, he was replaced as prime minister by Sigurður Ingi Jóhannsson, who also replaced him as chairman of the Progressive Party on 2 October 2016, following a defeat after he had campaigned to continue as leader. Just before the 2017 parliamentary election, he left the Progressive Party and founded the Centre Party; and is currently that party's leader.

The Progressive Party (Icelandic: Framsóknarflokkurinn, FSF) is an agrarian political party in Iceland.

From 30 November 2017 until the 2024 election, the party was a coalition partner in the Bjarni Benediktsson government. The current chairman of the party is Sigurður Ingi Jóhannsson who was elected on 2 October 2016. His predecessor was Sigmundur Davíð Gunnlaugsson, who was elected on 18 January 2009 and was Prime Minister of Iceland from 23 May 2013 to 5 April 2016.