Pemex

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Mexico’s state-owned, vertically integrated petroleum company and a central institution in the country’s energy system.

Last updated November 4, 2026

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Overview

Pemex, short for Petróleos Mexicanos, is Mexico’s state-owned petroleum corporation. Created in 1938 after President Lázaro Cárdenas nationalized the country’s privately operated oil industry, it became one of the most recognizable symbols of Mexican economic nationalism. The company is managed and operated by the Mexican government and has historically occupied a dominant position across Mexico’s hydrocarbon value chain, including exploration, crude-oil and natural-gas production, refining, processing, transportation, storage, distribution, and retail marketing. Pemex’s origins lie in Mexico’s early oil industry. Oil and asphalt had been used in the country for centuries, while commercial extraction and refining expanded in the late nineteenth and early twentieth centuries. Foreign companies, particularly British and American operators, developed much of the industry before the Mexican Constitution asserted national ownership over subsoil resources. Labor disputes over wages and working conditions eventually brought the government into direct conflict with foreign oil companies. On March 18, 1938, Cárdenas announced the expropriation of privately operated oil assets. Pemex was formally established by decree on June 7 of that year. The nationalization initially produced diplomatic and commercial difficulties, including foreign pressure and restrictions on Mexican oil sales. Wartime demand eventually helped restore access to international markets. Pemex subsequently expanded into an integrated national oil company and became a major source of public revenue. For decades, Mexico’s fiscal system relied heavily on taxes, duties, and other payments from the company. This role made Pemex strategically important but also exposed it to a heavy tax burden, political direction, investment constraints, and pressure to maintain fuel supplies and employment. The company’s upstream business has faced long-term production declines, especially after the peak of major mature fields. Falling output, aging infrastructure, limited deepwater capability, and the technical and financial difficulty of developing new reserves encouraged successive Mexican administrations to debate private participation and energy reform. Pemex has remained under state control, although the legal framework governing private investment and cooperation with outside companies has changed over time. Pemex operates refineries and petrochemical facilities in Mexico and sells fuels through a nationwide service-station network. It also exports crude oil and participates in international supply arrangements. A structural challenge has been Mexico’s simultaneous role as a crude exporter and importer of refined products, particularly gasoline. Government policy in the late 2010s and early 2020s emphasized strengthening domestic refining and reducing dependence on imported fuels. Projects associated with this strategy included the Dos Bocas refinery in Tabasco and the acquisition of the Deer Park refinery in Texas from Shell. Pemex is also one of the world’s most heavily indebted oil companies. Its financial position has been affected by high tax obligations, large investment requirements, operational incidents, weak or volatile commodity prices, declining production, fuel theft, pension and financing commitments, and government efforts to preserve the company’s central role. Mexican governments have repeatedly provided financial support or tax relief while seeking to improve production and refining performance. The brand therefore represents more than a commercial petroleum company. In Mexico it is associated with national sovereignty, public ownership, fuel availability, industrial employment, and government revenue. It is also associated with serious safety, environmental, governance, and financial controversies, including major industrial accidents, oil spills, alleged corruption, and criticism of its emissions profile. Pemex remains active and institutionally central, but its future depends on balancing national energy policy with financial sustainability, operational reliability, decarbonization pressures, and the changing economics of oil and gas.

History

Mexico’s petroleum industry developed from small-scale refining and extraction into a strategically important sector controlled increasingly by the state. Early commercial operations included British and American companies working in the Tampico and Gulf Coast regions. The Mexican Constitution of 1917 established an important legal basis for national control of subsoil resources, although foreign operators continued to play a major role in production and refining. Labor conflict became a decisive turning point in the 1930s. Oil workers sought improved wages and social benefits, while foreign companies resisted demands supported by Mexican labor authorities. President Lázaro Cárdenas sided with the workers and, on March 18, 1938, announced the expropriation of the foreign-operated oil industry under constitutional authority. The measure was presented as compensation-based nationalization rather than simple confiscation. Petróleos Mexicanos was created by presidential decree on June 7, 1938, to manage the expropriated assets and consolidate the national industry. The nationalization provoked opposition from affected companies and foreign governments. Some markets were closed to Mexican petroleum, creating an early commercial boycott. World War II increased the strategic demand for oil and helped end much of that isolation. Pemex then expanded as an integrated national oil company, developing production, refining, transport, petrochemicals, and fuel distribution. Its institutional importance grew because petroleum payments became a major source of Mexican government income. Production expanded substantially during the second half of the twentieth century, particularly after large discoveries in the Gulf of Mexico. The company’s fortunes changed as mature fields declined and new reserves became more difficult and expensive to develop. Production fell after the mid-2000s, while Mexico remained dependent on imported refined fuels despite exporting crude. These conditions encouraged debate over tax reform, private investment, deepwater technology, and the appropriate balance between state ownership and outside participation. Governments under Vicente Fox and Felipe Calderón considered mechanisms for attracting private capital and technology without fully privatizing Pemex. Energy reforms later permitted new forms of private participation and contracting. After 2018, President Andrés Manuel López Obrador placed greater emphasis on restoring Pemex’s role, expanding refining, reducing fuel imports, and limiting the private-sector opening. The strategy included financial support, tax relief, refinery investment, the Dos Bocas project, and the purchase of the Deer Park refinery. Pemex’s modern history has also been marked by safety and environmental incidents. The Ixtoc I blowout in 1979 became one of the largest offshore oil spills in history. A 1984 LPG-storage disaster at San Juan Ixhuatepec killed hundreds, and later accidents occurred at pipelines, refineries, platforms, tankers, and administrative facilities. Fuel theft and illegal tapping became major operational and security problems, culminating in the deadly 2019 Tlahuelilpan pipeline explosion. Corruption allegations, including the Odebrecht-related case involving former chief executive Emilio Lozoya, further damaged the company’s public reputation. Today, Pemex remains active as Mexico’s national petroleum corporation and a major participant in upstream, downstream, gas, petrochemical, and retail operations. Its strategic position is reinforced by state ownership and political symbolism, but its future is constrained by debt, declining or difficult-to-replace production, aging facilities, accident risk, environmental liabilities, and the global movement toward lower-carbon energy.

2024
Dos Bocas refinery enters operation
[1]Pemexen.wikipedia.org
The Dos Bocas refinery began operating at partial capacity as part of Mexico’s effort to increase domestic fuel production.
2021
Deer Park acquisition
[1]Pemexen.wikipedia.org
Mexico purchased the Deer Park refinery in Texas, expanding Pemex’s refining footprint in the United States.
2019
Tlahuelilpan pipeline explosion
[4]Tlahuelilpan pipeline explosionen.wikipedia.org
An explosion at an illegally tapped pipeline in Hidalgo killed at least 137 people.
2013
Mexican energy reform
[3]Energy reform in Mexicoen.wikipedia.org
Constitutional and legal changes opened new forms of private participation in Mexico’s hydrocarbon sector while retaining state ownership of resources.
2004
Production begins sustained decline
[1]Pemexen.wikipedia.org
Output from major mature fields began a prolonged decline, intensifying pressure for exploration and reform.
1984
San Juan Ixhuatepec LPG disaster
[1]Pemexen.wikipedia.org
A series of explosions at a Pemex LPG facility near Mexico City caused hundreds of deaths and thousands of injuries.
1979
Ixtoc I blowout
[1]Pemexen.wikipedia.org
An exploratory well blowout in the Bay of Campeche caused one of the largest oil spills in history.
1938
Oil expropriation and creation of Pemex
[1]Pemexen.wikipedia.org
President Lázaro Cárdenas nationalized foreign-operated oil assets in March, and Petróleos Mexicanos was established by decree in June.

Products and positioning

State-owned, vertically integrated national oil company serving Mexico’s energy system and embodying petroleum sovereignty.

Upstream petroleum · 1938
Crude oil
Pemex explores for, produces, gathers, transports, and sells crude oil from Mexican onshore and offshore fields. Crude exports have historically been an important source of foreign exchange, although government policy has increasingly emphasized sending more domestic production to Mexican refineries.
Upstream petroleum · 1938
Natural gas
The company produces and processes natural gas associated with oil fields and from dedicated gas operations. Gas production is used in Mexico’s industrial and power sectors, with supply limitations contributing to imports and infrastructure challenges.
Refined fuels · 1938
Gasoline and diesel
Pemex refines, imports, distributes, and markets gasoline and diesel for road transport. These fuels are sold through Pemex-branded service stations and have remained politically sensitive because Mexico has often imported refined products while exporting crude oil.
Gas products · 1938
Liquefied petroleum gas
Pemex supplies LPG for residential, commercial, and industrial use. LPG distribution has been part of efforts to maintain access to essential energy while responding to price pressures and fuel-market policy.
Chemicals · 1938
Petrochemicals
Pemex produces and markets petrochemical inputs and related industrial products derived from hydrocarbons. Its petrochemical operations connect upstream production and refining with Mexico’s manufacturing and chemical industries.

Controversies

2026
Fire reported at Pemex's Abkatún-H platform
Pemex reported a fire at its unmanned Abkatún-H satellite platform in the Sonda de Campeche on 19 October 2026. According to the company, no injuries were reported. The cause of the fire, the extent of damage, and whether production was interrupted were not known in the article. The event is recorded as a reported incident at the offshore platform, with the available information limited to the company's statement that there were no injuries and the absence of confirmed details on cause, damage, or operational impact.
Source
2021
Pemex reports undersea gas pipeline rupture and fire
In July 2021, Pemex reported that a rupture in an undersea gas pipeline in the Gulf of Mexico caused flames to appear at the surface. According to the company, the gas leak was brought under control about five hours later, and nobody was injured. The incident was described as a pipeline rupture that produced visible flames on the water, followed by containment of the leak. No further details on the cause, environmental impact, or operational consequences were provided in the source account.
Source
2021
Pemex reports fatalities after offshore platform fire
Pemex reported that a fire broke out at the E-Ku AS offshore platform during routine maintenance, leaving five people dead, six injured and two missing. The company said the blaze was under control about an hour after it was first reported.
Source
2019
Fuel theft and pipeline-security controversy
Widespread illegal tapping of Pemex pipelines generated major fuel losses and security concerns. The issue culminated in the deadly Tlahuelilpan explosion and led to an aggressive government campaign against fuel theft.
Source
2016
Odebrecht-related corruption allegations
Former Pemex chief executive Emilio Lozoya became associated with corruption investigations involving Brazilian construction company Odebrecht and alleged improper payments. The matter became one of the most prominent governance controversies connected with the company.
Source

2021
Acquire the Deer Park refineryM&A
Background
Mexico sought greater control over refining and to reduce dependence on imported fuels.
Action taken
The Mexican government purchased Shell’s interest in the Deer Park refinery in Texas for Pemex.
Aftermath
The transaction expanded Pemex’s refining presence outside Mexico and became a central element of the government’s domestic-refining strategy.
Purchase price. $600 million (2021)
Source
2021
Assume operatorship of the Zama fieldStrategy
Background
Zama was discovered by Talos Energy, but Mexican authorities determined that Pemex should operate the shared offshore reservoir.
Action taken
Pemex was appointed operator and was expected to work with Talos on development.
Aftermath
Talos disputed the decision, citing concerns including Pemex’s ability to finance the proposed development.
- Talos Energy — Talos challenged the government’s operatorship decision and raised concerns about development financing and control.
Source
2015
Reduce capital spending during oil-price weaknessStrategy
Background
Weak oil prices and production challenges increased pressure on Pemex’s finances.
Action taken
The board approved a major spending reduction, postponed some deepwater exploration, and adjusted investment plans.
Aftermath
The reductions highlighted the tension between fiscal discipline and the need to replace declining production.
Budget reduction. 11.5% below the previously approved 2015 budget (2015)
Source
2013
Permit broader private participation in hydrocarbonsStrategy
Background
Declining production and limited access to deepwater technology and capital created pressure to change the legal framework governing Pemex and the Mexican oil sector.
Action taken
Mexico adopted energy reforms allowing new forms of private investment, partnerships, and contracts while maintaining state ownership of underground resources.
Aftermath
The reform changed the competitive structure of the sector, but later governments partially reversed its policy direction and restored a stronger role for Pemex.
Source

Recent events

2025
Government financing measures announced to support Pemex balance-sheet management[13]Government financing measures announced to support Pemex balance-sheet managementclearygottlieb.com
Other
Mexico announced a sovereign-supported financing structure intended to assist Pemex with balance-sheet management and liability transactions.
2025
Pemex announces offers to purchase outstanding securities[14]Pemex announces offers to purchase outstanding securitiesprnewswire.com
Other
The company announced cash offers targeting multiple series of its outstanding debt securities as part of a broader liability-management program.
2023
Nohoch Alfa platform fire[1]Pemexen.wikipedia.org
Other
An offshore explosion and fire at the Nohoch Alfa platform in the Campeche region was classified as a serious incident.
2022
Pemex acquires full ownership of the Deer Park refinery[15]Pemex acquires full ownership of the Deer Park refineryen.wikipedia.org
M&A
Pemex completed the acquisition of Shell's remaining interest in the Deer Park refining complex in Texas, giving the Mexican state company full ownership of the facility.
2022
Dos Bocas refinery is inaugurated in Tabasco[16]Dos Bocas refinery is inaugurated in Tabascoen.wikipedia.org
Product launch
Mexico inaugurated the Olmeca refinery, commonly called Dos Bocas, as part of the government's effort to expand domestic refining capacity and reduce refined-fuel imports.
2021
Mexico purchases Deer Park refinery[1]Pemexen.wikipedia.org
M&A
The Mexican government purchased the Deer Park refinery in Texas as part of a policy to expand domestic control over refining and fuel supply.
2021
Pemex receives Zama field operating role[1]Pemexen.wikipedia.org
Lawsuit
Mexico’s energy authorities designated Pemex as operator of the Zama offshore field, a decision disputed by Talos Energy.
2021
Offshore pipeline fire raises safety concerns[1]Pemexen.wikipedia.org
Other
A subsea natural-gas pipeline leak in the Gulf of Mexico ignited at the surface, prompting renewed scrutiny of offshore maintenance and safety practices.
2021
Pemex named operator of the Zama oil field[1]Pemexen.wikipedia.org
Other
Mexico's energy authorities appointed Pemex as operator of the Zama field, originally discovered by Talos Energy, after a dispute over operatorship and development control.
2020
Pemex launches sovereignty-themed gasoline campaign[9]Competition concerns surrounding gasoline promotioneluniversal.com.mx
Campaign · Pricing
Pemex promoted its gasoline brand with messaging that connected consumer purchases to the recovery of national energy sovereignty. The campaign prompted questions from private fuel retailers and business groups about competition and pricing practices.

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