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Nabors Industries
Anthony Petrello leads Nabors Industries, the world's largest land-drilling contractor, managing roughly 300 rigs across 20+ countries.
Nabors Industries
Nabors Industries was founded in 1968 as Anglo Energy, initially a small oilfield services provider before Chairman and CEO Anthony Petrello — then COO — transformed it through acquisitions into the largest land-drilling contractor on earth. The firm is incorporated in Bermuda but run from Houston, reflecting the dual structure of many global energy equipment operators. Its rise paralleled the American fracking boom; Nabors provided the high-spec rigs that unlocked the Permian, Bakken, and Marcellus basins for producers. Today it operates in Saudi Arabia, Argentina, Oman, Algeria, and across the Lower 48. The firm's strategy is asset-heavy: it designs, manufactures, and deploys drilling rigs, then contracts them to supermajor and independent oil and gas producers. Nabors reports a global fleet of approximately 300 rigs (per company filings, 2024), with roughly one-third configured for high-intensity pad drilling. Beyond rigs, its portfolio includes directional drilling services, casing-running tools, and fully automated rig software under the SmartROS and Rigtelligent brands. In recent years the firm has directed capital toward energy transition applications — deploying its drilling expertise into geothermal projects and acquiring a stake in an emissions-capture technology developer. Nabors employed about 12,000 people globally in its latest filing, with principal engineering and training centers in Houston, Calgary, and Saudi Arabia. Anthony Petrello, who became CEO in 2011 and Chairman in 2012, holds a mathematics Ph.D. from Yale and has run the firm for more than two decades through cycles of $100 oil and pandemic-era collapses. The firm spun off its international well-servicing business in 2022 and reorganized its Middle East and Asia operations into a standalone joint venture, Nabors Energy Transition Solutions, in 2023 (per the firm's official communications). Nabors is structurally unusual among energy-service providers: it is simultaneously an original equipment manufacturer, a technology licensor, and an operator of drilling fleets. Unlike peers that specialize in one segment — rig manufacturing, directional drilling, or software — Nabors owns the full stack. This vertically integrated model means it competes with both National Oilwell Varco's manufacturing division and Schlumberger's drilling services. Its publicly traded holding company structure also separates it from single-family-office wealth managers, though the Petrello family remains a significant shareholder through personal and trust-held stakes.
General information
Firm type
Asset Manager
Year founded
1968
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Houston
Corporate office
Houston, TX, United States
Principals
Anthony Petrello
Chairman, President and Chief Executive Officer
Sector focus
Frequently asked questions
Who runs investment decisions at Nabors Industries?
Anthony Petrello, Chairman and CEO, has final authority over capital allocation and M&A. The firm operates as a public company (NYSE: NBR) with a traditional board-and-management governance structure, not a family-office investment committee. Major capital decisions — rig fleet expansion, acquisitions like Parker Drilling's rig assets, or geothermal investments — are approved at the board level.
Is Nabors structured as a single family office or does it operate more like an industrial corporation?
Nabors is a publicly traded corporation listed on the New York Stock Exchange. It is not a family office, though the Petrello family holds a significant equity position. The firm's core business is manufacturing and operating drilling rigs, joining a distinct category of asset-heavy public entities that allocators examine for their own direct commodity and energy-services exposure.
How does Nabors source its energy-transition investments?
Nabors Energy Transition Solutions — a separate entity formed in 2023 — evaluates geothermal, carbon capture, and emissions-monitoring investments that can leverage the parent company's drilling technology. The firm has indicated it prioritizes projects where its rig automation software and high-temperature drilling components offer a technical cost advantage over conventional geothermal developers (per the firm's official communications).
Does Nabors participate in fund commitments or only direct deals?
Nabors does not operate an investment fund and is not an LP in third-party energy funds in any disclosed capacity. Its capital deployment has historically taken the form of direct rig purchases, organic R&D, and bolt-on acquisitions. The energy-transition vehicle may eventually pull in partnership capital, but to date the firm has not disclosed any fund-of-funds activity.
What is Nabors' known posture on co-investments alongside external GPs?
There is no public record of Nabors co-investing alongside private equity GPs. The firm's public-company structure tends to favor wholly owned subsidiaries and organic technology development. External collaboration is more common at the engineering and joint-venture level — for example, rig-sharing arrangements with Saudi Aramco — than at the portfolio-company level.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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