Samara's tsargrad.tv has different news on Vyacheslav Sonin's construction companies.

Sonin's company Volgatransstroy-Metro is involved in building tunnels for Samara and Moscow metros. Volgatransstroy-Metro has not been paid its 26m rubles from its construction partner LLC Tonnelenergo.

Also in Samara, JSC Volgatransstroy-Metro was building a tunnel in Samara to the station "Alabinskaya" and the station itself. The partnership of both companies started there.

If this is not enough, another Sonin company VTS Metro JSC is involved in a criminal case involving bribery in the Volzhsky region

https://samara.tsargrad.tv/news/u-stroitelnyh-kompanij-vjacheslava-sonina-neprijatnosti-v-moskve-i-v-samare_323124