United Kingdom

Top 87 largest UK Companies in the Energy sector by Market Cap

This is the list of the largest public listed companies in the Energy sector from the United Kingdom by market capitalization with links to their reference stock and industry.

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Top Energy Companies from the United Kingdom as of Jan. 01, 2026

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Rank Company Market Cap (USD) Country Sector Industry
31 NWF Group plc $86.1 M United Kingdom UK Energy UK Oil & Gas Refining & Marketing
32 Enwell Energy plc $77.1 M

(July 1, 2025)

 United Kingdom UK Energy UK Oil & Gas E&P
33 Zephyr Energy plc $73.4 M

(July 1, 2025)

 United Kingdom UK Energy UK Oil & Gas E&P
34 Wentworth Resources plc $67.3 M

(July 1, 2023)

 United Kingdom UK Energy UK Oil & Gas E&P
35 Upland Resources Limited $63.5 M United Kingdom UK Energy UK Oil & Gas E&P
36 Jersey Oil and Gas plc $59.1 M

(July 1, 2025)

 United Kingdom UK Energy UK Oil & Gas E&P
37 Longboat Energy plc $50.7 M United Kingdom UK Energy UK Oil & Gas E&P
38 Predator Oil & Gas Holdings plc $34.2 M United Kingdom UK Energy UK Oil & Gas E&P
39 Chariot Ltd. $32.4 M United Kingdom UK Energy UK Oil & Gas E&P
40 GCM Resources plc $29.0 M United Kingdom UK Energy UK Thermal Coal
41 Sound Energy plc $28.7 M United Kingdom UK Energy UK Oil & Gas E&P
42 Europa Oil & Gas (Holdings) plc $28.4 M United Kingdom UK Energy UK Oil & Gas E&P
43 Petro Matad Limited $27.2 M United Kingdom UK Energy UK Oil & Gas E&P
44 Trinity Exploration & Production plc $24.1 M

(July 1, 2024)

 United Kingdom UK Energy UK Oil & Gas E&P
45 Pressure Technologies plc $21.3 M United Kingdom UK Energy UK Oil & Gas Equipment & Services
46 The Parkmead Group plc $21.3 M United Kingdom UK Energy UK Oil & Gas E&P
47 Prospex Energy plc $15.3 M United Kingdom UK Energy UK Oil & Gas E&P
48 Plexus Holdings plc $13.4 M United Kingdom UK Energy UK Oil & Gas Equipment & Services
49 Tower Resources plc $12.6 M United Kingdom UK Energy UK Oil & Gas E&P
50 Block Energy plc $10.2 M United Kingdom UK Energy UK Oil & Gas E&P
51 Westmount Energy Limited $8.7 M United Kingdom UK Energy UK Oil & Gas E&P
52 Oracle Power plc $7.9 M United Kingdom UK Energy UK Thermal Coal
53 Indus Gas Limited $7.2 M United Kingdom UK Energy UK Oil & Gas E&P
54 Reabold Resources plc $7.2 M United Kingdom UK Energy UK Oil & Gas E&P
55 Baron Oil plc $6.8 M United Kingdom UK Energy UK Oil & Gas E&P
56 United Oil & Gas plc $6.6 M United Kingdom UK Energy UK Oil & Gas E&P
57 UK Oil & Gas plc $6.5 M United Kingdom UK Energy UK Oil & Gas E&P
58 Serinus Energy plc $4.8 M

(Jan. 1, 2025)

 United Kingdom UK Energy UK Oil & Gas E&P
59 Bowleven plc $4.8 M

(July 1, 2024)

 United Kingdom UK Energy UK Oil & Gas Drilling
60 Union Jack Oil plc $4.4 M United Kingdom UK Energy UK Oil & Gas E&P

Top Energy Companies from the United Kingdom as of Jan. 01, 2026

31. NWF Group plc

Company Profile: NWF Group plc
Market Cap (USD): $86.1 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas Refining & Marketing

32. Enwell Energy plc

Company Profile: Enwell Energy plc
Market Cap (USD): $77.1 M (July 1, 2025)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

33. Zephyr Energy plc

Company Profile: Zephyr Energy plc
Market Cap (USD): $73.4 M (July 1, 2025)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

34. 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

35. Upland Resources Limited

Company Profile: Upland Resources Limited
Market Cap (USD): $63.5 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

36. Jersey Oil and Gas plc

Company Profile: Jersey Oil and Gas plc
Market Cap (USD): $59.1 M (July 1, 2025)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

37. Longboat Energy plc

Company Profile: Longboat Energy plc
Market Cap (USD): $50.7 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

38. Predator Oil & Gas Holdings plc

Company Profile: Predator Oil & Gas Holdings plc
Market Cap (USD): $34.2 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

39. Chariot Ltd.

Company Profile: Chariot Ltd.
Market Cap (USD): $32.4 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

40. GCM Resources plc

Company Profile: GCM Resources plc
Market Cap (USD): $29.0 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Thermal Coal

41. Sound Energy plc

Company Profile: Sound Energy plc
Market Cap (USD): $28.7 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

42. Europa Oil & Gas (Holdings) plc

Company Profile: Europa Oil & Gas (Holdings) plc
Market Cap (USD): $28.4 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

43. Petro Matad Limited

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

44. 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

45. Pressure Technologies plc

Company Profile: Pressure Technologies plc
Market Cap (USD): $21.3 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas Equipment & Services

46. The Parkmead Group plc

Company Profile: The Parkmead Group plc
Market Cap (USD): $21.3 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

47. Prospex Energy plc

Company Profile: Prospex Energy plc
Market Cap (USD): $15.3 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

48. Plexus Holdings plc

Company Profile: Plexus Holdings plc
Market Cap (USD): $13.4 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas Equipment & Services

49. Tower Resources plc

Company Profile: Tower Resources plc
Market Cap (USD): $12.6 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

50. Block Energy plc

Company Profile: Block Energy plc
Market Cap (USD): $10.2 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

51. Westmount Energy Limited

Company Profile: Westmount Energy Limited
Market Cap (USD): $8.7 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

52. Oracle Power plc

Company Profile: Oracle Power plc
Market Cap (USD): $7.9 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Thermal Coal

53. Indus Gas Limited

Company Profile: Indus Gas Limited
Market Cap (USD): $7.2 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

54. Reabold Resources plc

Company Profile: Reabold Resources plc
Market Cap (USD): $7.2 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

55. Baron Oil plc

Company Profile: Baron Oil plc
Market Cap (USD): $6.8 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

56. United Oil & Gas plc

Company Profile: United Oil & Gas plc
Market Cap (USD): $6.6 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

57. UK Oil & Gas plc

Company Profile: UK Oil & Gas plc
Market Cap (USD): $6.5 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

58. Serinus Energy plc

Company Profile: Serinus Energy plc
Market Cap (USD): $4.8 M (Jan. 1, 2025)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

59. Bowleven plc

Company Profile: Bowleven plc
Market Cap (USD): $4.8 M (July 1, 2024)
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas Drilling

60. Union Jack Oil plc

Company Profile: Union Jack Oil plc
Market Cap (USD): $4.4 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

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