467 active companies are registered in Mountain Ash with Companies House. Out of 573 companies ever registered here, 55 are no longer active — a 82% survival rate. The area has seen significant recent growth, with 60.6% of active businesses incorporated since 2020. Over half (74%) 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 34 companies. Mountain Ash is home to 24 FCA-regulated firms. Companies here hold 25 government contracts worth £145.8M in total. The average company age is 6.8 years. The earliest company registration in Mountain Ash dates back to 1942.
Source: Companies House register via UVAGATRON, October 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 6.8 years old. There are 24 <Link href="/glossary/fca-financial-conduct-authority">FCA-regulated firms</Link> in the area. 10 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There are 467 active companies registered in Mountain Ash, out of 573 total. 55 (10%) are no longer active.
The top industries in Mountain Ash include Buying and selling of own real estate (34 companies), Other letting and operating of own or leased real estate (28 companies), Take-away food shops and mobile food stands (16 companies).
60.6% of currently active companies in Mountain Ash were incorporated since 2020, indicating strong recent growth.
Our database contains 4,138 data signals across 10 categories for active companies in Mountain Ash. The largest category is Governance with 1,877 signals from 5 sources.
The oldest company registration in Mountain Ash dates back to 1942, spanning over 84 years of business history.