United Kingdom

Top 63 largest UK Companies in the Oil & Gas E&P industry by Market Cap

This is the list of the largest public listed companies in the Oil & Gas E&P industry from the United Kingdom by market capitalization with links to their reference stock.

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Top Oil & Gas E&P Companies from the United Kingdom as of Jul. 01, 2025

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Rank Company Market Cap (USD) Country Sector Industry
1 Energean plc $2.32 B United Kingdom UK Energy UK Oil & Gas E&P
2 President Energy plc $1.00 B

(Jan. 1, 2024)

 United Kingdom UK Energy UK Oil & Gas E&P
3 RAK Petroleum plc $999.9 M

(Oct. 1, 2022)

 United Kingdom UK Energy UK Oil & Gas E&P
4 Serica Energy plc $863.3 M United Kingdom UK Energy UK Oil & Gas E&P
5 Rockhopper Exploration plc $514.3 M United Kingdom UK Energy UK Oil & Gas E&P
6 Pantheon Resources plc $385.3 M United Kingdom UK Energy UK Oil & Gas E&P
7 EnQuest plc $322.0 M United Kingdom UK Energy UK Oil & Gas E&P
8 Tullow Oil plc $311.6 M United Kingdom UK Energy UK Oil & Gas E&P
9 Warrego Energy Limited $293.7 M

(March 1, 2023)

 United Kingdom UK Energy UK Oil & Gas E&P
10 Genel Energy plc $254.7 M United Kingdom UK Energy UK Oil & Gas E&P
11 Cairn Energy plc $215.4 M United Kingdom UK Energy UK Oil & Gas E&P
12 Phoenix Global Resources plc $208.5 M

(Sept. 1, 2022)

 United Kingdom UK Energy UK Oil & Gas E&P
13 Hurricane Energy plc $197.2 M

(June 1, 2023)

 United Kingdom UK Energy UK Oil & Gas E&P
14 i3 Energy plc $149.3 M

(July 1, 2024)

 United Kingdom UK Energy UK Oil & Gas E&P
15 Afentra PLC $147.1 M United Kingdom UK Energy UK Oil & Gas E&P
16 PetroNor E&P Ltd $139.4 M

(July 1, 2024)

 United Kingdom UK Energy UK Oil & Gas E&P
17 Pharos Energy plc $123.4 M United Kingdom UK Energy UK Oil & Gas E&P
18 Enwell Energy plc $77.1 M United Kingdom UK Energy UK Oil & Gas E&P
19 Borders & Southern Petroleum plc $74.9 M United Kingdom UK Energy UK Oil & Gas E&P
20 Zephyr Energy plc $73.4 M United Kingdom UK Energy UK Oil & Gas E&P
21 Caspian Sunrise plc $69.6 M United Kingdom UK Energy UK Oil & Gas E&P
22 Wentworth Resources plc $67.3 M

(July 1, 2023)

 United Kingdom UK Energy UK Oil & Gas E&P
23 Jersey Oil and Gas plc $59.1 M United Kingdom UK Energy UK Oil & Gas E&P
24 Chariot Ltd. $33.0 M United Kingdom UK Energy UK Oil & Gas E&P
25 Baron Oil plc $28.9 M United Kingdom UK Energy UK Oil & Gas E&P
26 Prospex Energy plc $27.2 M United Kingdom UK Energy UK Oil & Gas E&P
27 Petro Matad Limited $27.0 M United Kingdom UK Energy UK Oil & Gas E&P
28 Predator Oil & Gas Holdings plc $27.0 M United Kingdom UK Energy UK Oil & Gas E&P
29 Upland Resources Limited $24.4 M United Kingdom UK Energy UK Oil & Gas E&P
30 Trinity Exploration & Production plc $24.1 M

(July 1, 2024)

 United Kingdom UK Energy UK Oil & Gas E&P

Top Oil & Gas E&P Companies from the United Kingdom as of Jul. 01, 2025

1. Energean plc

Company Profile: Energean plc
Market Cap (USD): $2.32 B
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

2. President Energy plc

Company Profile: President Energy plc
Market Cap (USD): $1.00 B (Jan. 1, 2024)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

3. RAK Petroleum plc

Company Profile: RAK Petroleum plc
Market Cap (USD): $999.9 M (Oct. 1, 2022)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

4. Serica Energy plc

Company Profile: Serica Energy plc
Market Cap (USD): $863.3 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

5. Rockhopper Exploration plc

Company Profile: Rockhopper Exploration plc
Market Cap (USD): $514.3 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

6. Pantheon Resources plc

Company Profile: Pantheon Resources plc
Market Cap (USD): $385.3 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

7. EnQuest plc

Company Profile: EnQuest plc
Market Cap (USD): $322.0 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

8. Tullow Oil plc

Company Profile: Tullow Oil plc
Market Cap (USD): $311.6 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

9. Warrego Energy Limited

Company Profile: Warrego Energy Limited
Market Cap (USD): $293.7 M (March 1, 2023)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

10. Genel Energy plc

Company Profile: Genel Energy plc
Market Cap (USD): $254.7 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

11. Cairn Energy plc

Company Profile: Cairn Energy plc
Market Cap (USD): $215.4 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

12. Phoenix Global Resources plc

Company Profile: Phoenix Global Resources plc
Market Cap (USD): $208.5 M (Sept. 1, 2022)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

13. Hurricane Energy plc

Company Profile: Hurricane Energy plc
Market Cap (USD): $197.2 M (June 1, 2023)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

14. i3 Energy plc

Company Profile: i3 Energy plc
Market Cap (USD): $149.3 M (July 1, 2024)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

15. Afentra PLC

Company Profile: Afentra PLC
Market Cap (USD): $147.1 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

16. PetroNor E&P Ltd

Company Profile: PetroNor E&P Ltd
Market Cap (USD): $139.4 M (July 1, 2024)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

17. Pharos Energy plc

Company Profile: Pharos Energy plc
Market Cap (USD): $123.4 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

18. Enwell Energy plc

Company Profile: Enwell Energy plc
Market Cap (USD): $77.1 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

19. Borders & Southern Petroleum plc

Company Profile: Borders & Southern Petroleum plc
Market Cap (USD): $74.9 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

20. Zephyr Energy plc

Company Profile: Zephyr Energy plc
Market Cap (USD): $73.4 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

21. Caspian Sunrise plc

Company Profile: Caspian Sunrise plc
Market Cap (USD): $69.6 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

22. Wentworth Resources plc

Company Profile: Wentworth Resources plc
Market Cap (USD): $67.3 M (July 1, 2023)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

23. Jersey Oil and Gas plc

Company Profile: Jersey Oil and Gas plc
Market Cap (USD): $59.1 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

24. Chariot Ltd.

Company Profile: Chariot Ltd.
Market Cap (USD): $33.0 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

25. Baron Oil plc

Company Profile: Baron Oil plc
Market Cap (USD): $28.9 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

26. Prospex Energy plc

Company Profile: Prospex Energy plc
Market Cap (USD): $27.2 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

27. Petro Matad Limited

Company Profile: Petro Matad Limited
Market Cap (USD): $27.0 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

28. Predator Oil & Gas Holdings plc

Company Profile: Predator Oil & Gas Holdings plc
Market Cap (USD): $27.0 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

29. Upland Resources Limited

Company Profile: Upland Resources Limited
Market Cap (USD): $24.4 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

30. Trinity Exploration & Production plc

Company Profile: Trinity Exploration & Production plc
Market Cap (USD): $24.1 M (July 1, 2024)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

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