The club was founded as Heidebloem Voetbalvereeniging Hulst on 14 June 1942, joining the Royal Belgian Football Association just a few months later.

In 2001, the club moved from its accommodations in the commune of Hulst to the Gemeentelijk Sportpark closer to the centre of Tessenderlo.

Meanwhile, Thes Sport started its rise in the ranks of Belgian football, promoting to the first provincial division in 2003 and even into the national leagues in 2005, before relegating back in 2009.

In 2015, the club again gained access to the Belgian Fourth Division, the lowest level of national football, at which time the merger with VK Penarol Engsbergen did complete and the latter ceased to exist.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.