774 active companies are registered in Seaham with Companies House. Out of 862 companies ever registered here, 1 are no longer active — a 90% survival rate. The area has seen significant recent growth, with 59.9% of active businesses incorporated since 2020. Over half (66%) 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 43 companies. Seaham is home to 19 FCA-regulated firms. Companies here hold 32 government contracts worth £16.5M in total. The average company age is 6.8 years. The earliest company registration in Seaham dates back to 1942.
Source: Companies House register via UVAGATRON, April 2026
Seaham is a growth hotspot — over half of its active companies were formed since 2020.
The average active company in Seaham is 6.8 years old. There are 19 <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 32 government contracts with a combined value of £16.5M. See the Top Government Contractors report.
There are 774 active companies registered in Seaham, out of 862 total. 1 (0%) are no longer active.
The top industries in Seaham include Buying and selling of own real estate (43 companies), Other letting and operating of own or leased real estate (40 companies), Take-away food shops and mobile food stands (32 companies).
59.9% of currently active companies in Seaham were incorporated since 2020, indicating strong recent growth.
Our database contains 4,680 data signals across 11 categories for active companies in Seaham. The largest category is Governance with 2,358 signals from 5 sources.
The oldest company registration in Seaham dates back to 1942, spanning over 84 years of business history.