On 7 December 2015, the United Nations General Assembly reiterated the “universal objective of taking forward nuclear disarmament negotiations” and decided (by vote) to establish an open-ended working group (OEWG) towards that end. The OEWG met in Geneva for three sessions for a total of 15 days between 22 February and 19 August 2016 under the Chairmanship of Ambassador Thani Thongphakdi of Thailand. The Group’s report will be considered by the General Assembly later this year. This paper outlines central themes in the discussions and conclusions of the 2016 OEWG and takes stock of its contribution towards nuclear disarmament. UNIDIR.