It is well established that participation in formal adult education varies by individual background characteristics. However, less attention has been paid to examining inequality in participation as a consequence of policy changes, such as educational expansion. This paper examines the process of tremendous expansion in Swedish Higher Vocational Education (HVE), a vocationally oriented postsecondary educational segment driven by labor market needs. Using a demographic approach with a sociological lens on educational participation, we analyze administrative data from registers, uncovering who has been served by this expanding adult educational form. Our results indicate that expansion of HVE has led to growth in participation for policy-prioritized groups, although the rate of growth in enrollment between groups varies and corresponds to population changes. We also locate the extent of cumulative advantages in participation and discuss these results in relation to social (in)equality in formalized HVE.