Rontec was formed in 2011 as a combination of a number of investors, mainly Snax 24.
Rontec's main business plan is to purchase sites which were formerly operated by the major fuel suppliers. In 2011, Rontec purchased 810 sites from Total, 251 of which were immediately sold on to Shell. In more recent years they have taken over 55 former ROC and several Co-operative Group sites. In 2018, Rontec started to convert the majority of their Esso branded filling stations to BP.
Rontec replaced many of the former Snax 24 sites, which usually had Mace stores, with own-branded Shop 'n Drive and Spar stores. Concessions within some of their stores include West Cornwall Pasty Company and Costa Express, but they also have Subway franchises located within lots of their larger stores. In partnership with Morrisons, Rontec have also opened pilot Morrisons Daily stores across the country.