United Kingdom

Top 12 largest UK Companies in the Security & Protection Services industry by Market Cap

This is the list of the largest public listed companies in the Security & Protection Services industry from the United Kingdom by market capitalization with links to their reference stock.

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Top Security & Protection Services Companies from the United Kingdom as of Jan. 01, 2026

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Rank Company Market Cap (USD) Country Sector Industry
1 Marlowe plc $473.9 M

(July 1, 2025)

 United Kingdom UK Industrials UK Security & Protection Services
2 Journeo plc $119.4 M United Kingdom UK Industrials UK Security & Protection Services
3 AssetCo plc $54.5 M

(Jan. 1, 2025)

 United Kingdom UK Industrials UK Security & Protection Services
4 Synectics plc $50.9 M United Kingdom UK Industrials UK Security & Protection Services
5 FireAngel Safety Technology Group plc $23.1 M

(Jan. 1, 2024)

 United Kingdom UK Industrials UK Security & Protection Services
6 Croma Security Solutions Group plc $13.7 M United Kingdom UK Industrials UK Security & Protection Services
7 Newmark Security plc $13.0 M United Kingdom UK Industrials UK Security & Protection Services
8 Petards Group plc $8.2 M United Kingdom UK Industrials UK Security & Protection Services
9 Thruvision Group plc $5.7 M United Kingdom UK Industrials UK Security & Protection Services
10 Westminster Group plc $5.2 M United Kingdom UK Industrials UK Security & Protection Services
11 London Security plc $4.5 M United Kingdom UK Industrials UK Security & Protection Services
12 Image Scan Holdings plc $3.9 M United Kingdom UK Industrials UK Security & Protection Services

Top Security & Protection Services Companies from the United Kingdom as of Jan. 01, 2026

1. Marlowe plc

Company Profile: Marlowe plc
Market Cap (USD): $473.9 M (July 1, 2025)
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

2. Journeo plc

Company Profile: Journeo plc
Market Cap (USD): $119.4 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

3. AssetCo plc

Company Profile: AssetCo plc
Market Cap (USD): $54.5 M (Jan. 1, 2025)
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

4. Synectics plc

Company Profile: Synectics plc
Market Cap (USD): $50.9 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

5. FireAngel Safety Technology Group plc

Company Profile: FireAngel Safety Technology Group plc
Market Cap (USD): $23.1 M (Jan. 1, 2024)
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

6. Croma Security Solutions Group plc

Company Profile: Croma Security Solutions Group plc
Market Cap (USD): $13.7 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

7. Newmark Security plc

Company Profile: Newmark Security plc
Market Cap (USD): $13.0 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

8. Petards Group plc

Company Profile: Petards Group plc
Market Cap (USD): $8.2 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

9. Thruvision Group plc

Company Profile: Thruvision Group plc
Market Cap (USD): $5.7 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

10. Westminster Group plc

Company Profile: Westminster Group plc
Market Cap (USD): $5.2 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

11. London Security plc

Company Profile: London Security plc
Market Cap (USD): $4.5 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

12. Image Scan Holdings plc

Company Profile: Image Scan Holdings plc
Market Cap (USD): $3.9 M
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

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