The appointment of the four agencies to the roster followed a competitive tender process handled by the AAR.
Preloaded will work specifically on the redevelopment of the corporate website. The other three agencies appointed are Cogapp, Deconstruct and Net Efficiency.
Ella Muers, director of marketing and brand development at Arts Council England said Arts Council England wanted to increase the creativity and quality of its online work.
The Arts Council has been seeking to appoint a roster of agencies since the summer.