755 active companies are registered in Seaham with Companies House. Out of 944 companies ever registered here, 108 are no longer active — a 80% survival rate. The area has seen significant recent growth, with 60.3% of active businesses incorporated since 2020. Over half (78%) 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 42 companies. Seaham is home to 21 FCA-regulated firms. Companies here hold 35 government contracts worth £16.8M in total. The average company age is 7.2 years. The earliest company registration in Seaham dates back to 1936.
Source: Companies House register via UVAGATRON, October 2026
Seaham is a growth hotspot — over half of its active companies were formed since 2020.
The average active company in Seaham is 7.2 years old. There are 21 <Link href="/glossary/fca-financial-conduct-authority">FCA-regulated firms</Link> in the area. 6 registered charities operate locally.
Companies in Seaham have been awarded 35 government contracts with a combined value of £16.8M. See the Top Government Contractors report.
There are 755 active companies registered in Seaham, out of 944 total. 108 (11%) are no longer active.
The top industries in Seaham include Buying and selling of own real estate (42 companies), Other letting and operating of own or leased real estate (39 companies), Take-away food shops and mobile food stands (26 companies).
60.3% of currently active companies in Seaham were incorporated since 2020, indicating strong recent growth.
Our database contains 6,489 data signals across 11 categories for active companies in Seaham. The largest category is Governance with 3,155 signals from 4 sources.
The oldest company registration in Seaham dates back to 1936, spanning over 90 years of business history.