![]() Diamond Offshore Drilling Leading deepwater drilling contractor, owns and operates one of the largest fleets of offshore drilling units in the world | ![]() Precision Drilling Precision Drilling is a provider of onshore drilling, completion, and production services to exploration and production companies in the oil and natural gas industry. | ![]() Gastar Exploration Gastar Exploration Inc. is engaged in the exploration, development and production of oil, condensate, natural gas and natural gas liquids in the United States. | ![]() Gulfsands Petroleum Gulfsands Petroleum is an independent oil and gas exploration and production company. | ||
Founding Date | Founding Date 1992 | Founding Date 1951 | Founding Date N/A | Founding Date 1997 | Founding Date 1876 |
Type | Type Public | Type Public | Type Private | Type Private | Type Public |
Tags | |||||
Locations | Locations Houston, US HQ Bentley, AU Singapore, SG Aberdeen, GB | Locations Calgary, CA HQ Dubai, AE Houston, US | Locations Houston, US HQ | Locations Houston, US HQ | |
Employees | Employees 2,5009% increase | Employees 5,504 | Employees 452% increase | Employees 13 | Employees 1151% decrease |
Valuation ($) | Valuation ($) 1.4 b | Valuation ($) 816.9 m | Valuation ($) N/A | Valuation ($) N/A | Valuation ($) 3.1 b |
Financial | |||||
Revenue (est.) | Revenue (est.) $1.1b (FY, 2023) | Revenue (est.) $1.8b (FY, 2025) | Revenue (est.) $72.1m (FY, 2017) | Revenue (est.) N/A | Revenue (est.) $469.9m (FY, 2025) |
Net income | Net income ($44.7m) (FY, 2023) | Net income $3.1m (FY, 2025) | Net income ($46.8m) (FY, 2017) | Net income N/A | Net income $299.9m (FY, 2025) |

Precision Drilling is a provider of onshore drilling, completion, and production services to exploration and production companies in the oil and natural gas industry.
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Gastar Exploration Inc. is engaged in the exploration, development and production of oil, condensate, natural gas and natural gas liquids in the United States.
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Gulfsands Petroleum is an independent oil and gas exploration and production company.
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Black Stone Minerals is an oil and natural gas corporation.
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