482 active companies are registered in Mountain Ash with Companies House. Out of 548 companies ever registered here, 0 are no longer active — a 88% survival rate. The area has seen significant recent growth, with 59.1% of active businesses incorporated since 2020. Over half (65%) of active companies were formed since 2020, making this one of the UK's fastest-growing business locations. The most common industry sector is buying and selling of own real estate, with 33 companies. Mountain Ash is home to 19 FCA-regulated firms. Companies here hold 25 government contracts worth £145.8M in total. The average company age is 6.6 years. The earliest company registration in Mountain Ash dates back to 1942.
Source: Companies House register via UVAGATRON, April 2026
Mountain Ash is a growth hotspot — over half of its active companies were formed since 2020.
The average active company in Mountain Ash is 6.6 years old. There are 19 <Link href="/glossary/fca-financial-conduct-authority">FCA-regulated firms</Link> in the area. 11 registered charities operate locally.
Companies in Mountain Ash have been awarded 25 government contracts with a combined value of £145.8M. See the Top Government Contractors report.
There are 482 active companies registered in Mountain Ash, out of 548 total. 0 (0%) are no longer active.
The top industries in Mountain Ash include Buying and selling of own real estate (33 companies), Other letting and operating of own or leased real estate (26 companies), Take-away food shops and mobile food stands (21 companies).
59.1% of currently active companies in Mountain Ash were incorporated since 2020, indicating strong recent growth.
Our database contains 3,013 data signals across 10 categories for active companies in Mountain Ash. The largest category is Governance with 1,447 signals from 5 sources.
The oldest company registration in Mountain Ash dates back to 1942, spanning over 84 years of business history.