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Top 29 largest Companies in the Oil & Gas Drilling industry in the World by Market Cap

This is the list of the largest public listed companies in the Oil & Gas Drilling industry in the world by market capitalization with links to their reference stock.

World Oil & Gas Drilling Industry Analysis
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Top Oil & Gas Drilling Companies in the World as of Jan. 01, 2026

Rank Company Market Cap (USD) Country Sector Industry
1 Sinopec Oilfield Service Corp $5.92 B China Chinese Energy Chinese Oil & Gas Drilling
2 Transocean Ltd. $4.67 B Switzerland Swiss Energy Swiss Oil & Gas Drilling
3 Seadrill Ltd $3.52 B

(July 1, 2024)

 Bermuda Bermuda Energy Bermuda Oil & Gas Drilling
4 Helmerich & Payne, Inc. $2.98 B United States US Energy US Oil & Gas Drilling
5 Patterson-UTI Energy, Inc. $2.49 B United States US Energy US Oil & Gas Drilling
6 Odfjell Drilling Ltd $2.11 B United Kingdom UK Energy UK Oil & Gas Drilling
7 Drilling Co of 1972 A-S-The $2.03 B

(Oct. 1, 2022)

 Denmark Danish Energy Danish Oil & Gas Drilling
8 Borr Drilling Limited $1.22 B Bermuda Bermuda Energy Bermuda Oil & Gas Drilling
9 Precision Drilling Corporation $971.2 M Canada Canadian Energy Canadian Oil & Gas Drilling
10 Nabors Industries Ltd. $807.5 M Bermuda Bermuda Energy Bermuda Oil & Gas Drilling
11 Ipek Dogal Enerji Kaynaklari Arastirma ve Üretim A.S. $561.3 M Turkey Turkish Energy Turkish Oil & Gas Drilling
12 Public Joint Stock Company Varyoganneftegaz $538.2 M

(July 1, 2025)

 Russia Russian Energy Russian Oil & Gas Drilling
13 Shelf Drilling Ltd $439.1 M

(July 1, 2024)

 United Arab Emirates United Arab Emirates Energy United Arab Emirates Oil & Gas Drilling
14 Ensign Energy Services Inc. $360.6 M Canada Canadian Energy Canadian Oil & Gas Drilling
15 Northern Ocean Ltd $253.8 M Bermuda Bermuda Energy Bermuda Oil & Gas Drilling
16 PHX Energy Services Corp. $251.8 M Canada Canadian Energy Canadian Oil & Gas Drilling
17 Vantage Drilling International $162.7 M United States US Energy US Oil & Gas Drilling
18 Cathedral Energy Services Ltd. $159.4 M

(July 1, 2024)

 Canada Canadian Energy Canadian Oil & Gas Drilling
19 Daldrup & Soehne AG $131.1 M Germany German Energy German Oil & Gas Drilling
20 Western Energy Services Corp. $58.8 M

(July 1, 2025)

 Canada Canadian Energy Canadian Oil & Gas Drilling
21 Archer Ltd $4.8 M

(July 1, 2024)

 Bermuda Bermuda Energy Bermuda Oil & Gas Drilling
22 Bowleven plc $4.8 M

(July 1, 2024)

 United Kingdom UK Energy UK Oil & Gas Drilling
23 TomCo Energy plc $4.2 M United Kingdom UK Energy UK Oil & Gas Drilling
24 Noble Corp plc United States US Energy US Oil & Gas Drilling
25 Petrominerals Corp United States US Energy US Oil & Gas Drilling
26 Justiss Oil Co., Inc. United States US Energy US Oil & Gas Drilling
27 Beard Co. (The) United States US Energy US Oil & Gas Drilling
28 Diamond Offshore Drilling Inc United States US Energy US Oil & Gas Drilling
29 Anglo African Oil & Gas plc United Kingdom UK Energy UK Oil & Gas Drilling

Top Oil & Gas Drilling Companies in the World as of Jan. 01, 2026

1. Sinopec Oilfield Service Corp

Company Profile: Sinopec Oilfield Service Corp
Market Cap (USD): $5.92 B
Country: China
Sector: Chinese Energy
Industry: Chinese Oil & Gas Drilling

2. Transocean Ltd.

Company Profile: Transocean Ltd.
Market Cap (USD): $4.67 B
Country: Switzerland
Sector: Swiss Energy
Industry: Swiss Oil & Gas Drilling

3. Seadrill Ltd

Company Profile: Seadrill Ltd
Market Cap (USD): $3.52 B (July 1, 2024)
Country: Bermuda
Sector: Bermuda Energy
Industry: Bermuda Oil & Gas Drilling

4. Helmerich & Payne, Inc.

Company Profile: Helmerich & Payne, Inc.
Market Cap (USD): $2.98 B
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

5. Patterson-UTI Energy, Inc.

Company Profile: Patterson-UTI Energy, Inc.
Market Cap (USD): $2.49 B
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

6. Odfjell Drilling Ltd

Company Profile: Odfjell Drilling Ltd
Market Cap (USD): $2.11 B
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas Drilling

7. Drilling Co of 1972 A-S-The

Company Profile: Drilling Co of 1972 A-S-The
Market Cap (USD): $2.03 B (Oct. 1, 2022)
Country: Denmark
Sector: Danish Energy
Industry: Danish Oil & Gas Drilling

8. Borr Drilling Limited

Company Profile: Borr Drilling Limited
Market Cap (USD): $1.22 B
Country: Bermuda
Sector: Bermuda Energy
Industry: Bermuda Oil & Gas Drilling

9. Precision Drilling Corporation

Company Profile: Precision Drilling Corporation
Market Cap (USD): $971.2 M
Country: Canada
Sector: Canadian Energy
Industry: Canadian Oil & Gas Drilling

10. Nabors Industries Ltd.

Company Profile: Nabors Industries Ltd.
Market Cap (USD): $807.5 M
Country: Bermuda
Sector: Bermuda Energy
Industry: Bermuda Oil & Gas Drilling

11. Ipek Dogal Enerji Kaynaklari Arastirma ve Üretim A.S.

Company Profile: Ipek Dogal Enerji Kaynaklari Arastirma ve Üretim A.S.
Market Cap (USD): $561.3 M
Country: Turkey
Sector: Turkish Energy
Industry: Turkish Oil & Gas Drilling

12. Public Joint Stock Company Varyoganneftegaz

Company Profile: Public Joint Stock Company Varyoganneftegaz
Market Cap (USD): $538.2 M (July 1, 2025)
Country: Russia
Sector: Russian Energy
Industry: Russian Oil & Gas Drilling

13. Shelf Drilling Ltd

Company Profile: Shelf Drilling Ltd
Market Cap (USD): $439.1 M (July 1, 2024)
Country: United Arab Emirates
Sector: United Arab Emirates Energy
Industry: United Arab Emirates Oil & Gas Drilling

14. Ensign Energy Services Inc.

Company Profile: Ensign Energy Services Inc.
Market Cap (USD): $360.6 M
Country: Canada
Sector: Canadian Energy
Industry: Canadian Oil & Gas Drilling

15. Northern Ocean Ltd

Company Profile: Northern Ocean Ltd
Market Cap (USD): $253.8 M
Country: Bermuda
Sector: Bermuda Energy
Industry: Bermuda Oil & Gas Drilling

16. PHX Energy Services Corp.

Company Profile: PHX Energy Services Corp.
Market Cap (USD): $251.8 M
Country: Canada
Sector: Canadian Energy
Industry: Canadian Oil & Gas Drilling

17. Vantage Drilling International

Company Profile: Vantage Drilling International
Market Cap (USD): $162.7 M
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

18. Cathedral Energy Services Ltd.

Company Profile: Cathedral Energy Services Ltd.
Market Cap (USD): $159.4 M (July 1, 2024)
Country: Canada
Sector: Canadian Energy
Industry: Canadian Oil & Gas Drilling

19. Daldrup & Soehne AG

Company Profile: Daldrup & Soehne AG
Market Cap (USD): $131.1 M
Country: Germany
Sector: German Energy
Industry: German Oil & Gas Drilling

20. Western Energy Services Corp.

Company Profile: Western Energy Services Corp.
Market Cap (USD): $58.8 M (July 1, 2025)
Country: Canada
Sector: Canadian Energy
Industry: Canadian Oil & Gas Drilling

21. Archer Ltd

Company Profile: Archer Ltd
Market Cap (USD): $4.8 M (July 1, 2024)
Country: Bermuda
Sector: Bermuda Energy
Industry: Bermuda Oil & Gas Drilling

22. 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

23. TomCo Energy plc

Company Profile: TomCo Energy plc
Market Cap (USD): $4.2 M
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas Drilling

24. Noble Corp plc

Company Profile: Noble Corp plc
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

25. Petrominerals Corp

Company Profile: Petrominerals Corp
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

26. Justiss Oil Co., Inc.

Company Profile: Justiss Oil Co., Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

27. Beard Co. (The)

Company Profile: Beard Co. (The)
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

28. Diamond Offshore Drilling Inc

Company Profile: Diamond Offshore Drilling Inc
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

29. Anglo African Oil & Gas plc

Company Profile: Anglo African Oil & Gas plc
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas Drilling

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