Free top 10 of 100
| # | Company | City | Industry | Staff | 1-yr growth |
|---|---|---|---|---|---|
| 1 | AGZ Group | Architecture, Engineering & Design | 50-99 | 200%+ (estimated) | |
| 2 | Sanima Mai Hydropower | Guildford | Architecture, Engineering & Design | 20-49 | 200%+ (estimated) |
| 3 | Modern Design & Engineering Consulting | London | Architecture, Engineering & Design | 20-49 | 200%+ (estimated) |
| 4 | Briary Energy | Hatfield | Architecture, Engineering & Design | 10-19 | 200%+ (estimated) |
| 5 | Philip Hughes Associates | Wincanton | Architecture, Engineering & Design | 10-19 | 200%+ (estimated) |
| 6 | Damp Detectives | Derby | Architecture, Engineering & Design | 10-19 | 200%+ (estimated) |
| 7 | NIFES Consulting Group | Warrington | Architecture, Engineering & Design | 100-249 | +100–200% |
| 8 | Green Zone Surveys | Wallsend | Architecture, Engineering & Design | 100-249 | +100–200% |
| 9 | Quadrant Building Control | Burton-On-Trent | Architecture, Engineering & Design | 100-249 | +100–200% |
| 10 | Azhar Architecture | London | Architecture, Engineering & Design | 50-99 | +100–200% |
Edition October 2026. Source: licensed B2B firmographic and technographic data. Company-level only.
What the data shows
- Most common growth band: +50–100% (49 of 100 companies, 49%).
- 21 of 100 (21%) at least doubled headcount in a year (figures over 200% are estimates).
- Biggest industries: Architecture, Engineering & Design (100).
- London has the most (28 of 100, 28%); the list spans 61 towns and cities.
- Size mix: 57 under 50 staff, 32 with 50–199, 11 with 200+ (median 28 employees).
Get all 100: $7
CSV + Excel + PDF with website, size, growth and revenue bands and a careers search link for every company.
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Notes and limits
- 1-year headcount growth from licensed B2B firmographic and technographic data. Companies with 10–1,000 staff that grew 20%+ in a year. UK file: every company growing 50%+ is included; in the +20–50% band the largest companies are kept (21+ staff).
- Growth is shown as a band: +20–50%, +50–100%, +100–200% or 200%+ (estimated). Within a band, companies are listed largest first; the order inside a band is not a growth ranking.
- "200%+ (estimated)" means the growth figure is above 200% and has not been verified; treat it as an estimate.
- Likely branches of larger groups, schools, academy trusts, colleges and university units are left out.
- Growth is a signal, not a guarantee of open roles or budget.
- Company-level data only: no personal contacts.
Related lists
- Fast-growing companies in the UK: full list, all sectors (4005 companies)
- Fastest-growing Construction companies in the UK (100 companies)
- Fastest-growing Consulting companies in the UK (100 companies)
- Fastest-growing Finance & Insurance companies in the UK (100 companies)
- Fastest-growing Healthcare & Care companies in the UK (100 companies)
- Fastest-growing Hospitality companies in the UK (100 companies)
- Fastest-growing IT Services companies in the UK (100 companies)
- Fastest-growing Logistics & Transport companies in the UK (100 companies)
All: Fastest-growing companies by industry: UK, US, Netherlands, Canada, Ireland · All global lists
FAQ
- How is growth measured?
- 1-year change in headcount from licensed B2B firmographic and technographic data, shown as a band. Within a band, larger companies come first. Figures over 200% are estimates.
- Who is this for?
- Job seekers who want companies that are adding people, and B2B sellers, recruiters and agencies looking for companies with new budget.
- What do I get for $7?
- All 100 companies with website, city, sector, industry, size band, growth band, revenue band and careers link, as CSV, Excel and PDF.