Like all its predecessors, the union affiliated to the Swedish Trade Union Confederation. On formation, it had 145,350 members, and the number grew to 161,794 in 1986. The National Association of Civil Servants in Prisons split away in 1973.[2][3]
In 1995, the union became SEKO. The following year, the Swedish Sailors' Union merged in, then in 1997 the Swedish Association of Engine Drivers split away. By 2019, it had a membership of 70,818.[2]
^ abcKjellberg, Anders (2017). The Membership Development of Swedish Trade Unions and Union Confederations Since the End of the Nineteenth Century. Lund University. p. 112–114. ISBN9172673109.
^ abEbbinghaus, Bernhard; Visser, Jelle (2000). Trade Unions in Western Europe Since 1945. Basingstoke: Palgrave Macmillan. p. 626–630. ISBN0333771125.