Sabiedrība ar ierobežotu atbildību "SO4" is a Latvian limited liability company registered in 2011. Its primary line of business is accounting, bookkeeping and auditing activities; tax consultancy (NACE 69.20). In 2025 the company reported €12K in revenue, placing it in the micro-enterprise tier. Revenue declined 34% year-over-year, indicating a contracting operation.