Journally Speaking: The changing face of industry leaders
"Major" and "independent" still describe two structurally different kinds of companies—one integrated across exploration, refining, marketing, and often chemicals, and the other concentrated upstream, with some extending into midstream infrastructure, but rarely further downstream. What the OGJ50 rankings show is that size no longer reliably tells you which is which.
A comparison of the fiscal yearend 2015 and 2025 OGJ50 rankings shows why. Whether measured by oil reserves, natural gas reserves, or total assets, only 7-8 companies remain among the Top 20 in those categories a decade later, the industry's most recognizable integrated majors, whose global scale and decades-long resource positions have kept them near the top. The rest of the list has turned over almost entirely.
What replaced those names is telling. Diamondback Energy, EQT, Expand Energy, and Coterra Energy now each rank in the Top 10 by total assets—none of them occupied a Top 20 spot in 2015. Diamondback's climb is the starkest. The operator first appeared in the OGJ150 rankings at No. 63 following its 2012 initial public offering (IPO). A string of acquisitions since 2017, capped by its $26 billion merger with Endeavor Energy Resources, has propelled Diamondback to being a dominant Permian basin operator. Now sized alongside companies many times its former scale. Coterra Energy ranked No. 10 this year before combining with Devon Energy, giving an already large independent scale that used to be exclusive to the majors.
Antero Resources reached the Top 20 as early as 2015, just 2 years after its 2013 IPO, built around a concentrated position in the Marcellus shale. Permian Resources, Chord Energy, Crescent Energy, and SM Energy have all risen into the Top 20 since 2015, each through a ‘merger of equals’ that doubled company scale overnight: Permian Resources through its 2022 combination of Centennial Resource Development and Colgate Energy, Chord Energy via Oasis Petroleum's merger with Whiting Petroleum, Crescent Energy's 2021 combination with privately held Contango Oil & Gas, and SM Energy's more recent combination with Civitas Resources.
By total assets, production and reserves, several of today's leading independents now sit close enough to the majors that scale no longer separates the two the way it once did. Even at the very top of the rankings, the pattern holds. ExxonMobil still leads the industry in every financial category, including total assets, but its dominance in the physical categories is no longer as clean. ExxonMobil remains far ahead in worldwide liquids reserves and production, yet ranks third in natural gas reserves and production, both in the US and worldwide, behind EQT and Expand Energy, which hold the top two spots. Neither is an integrated major, a reminder that scale and structure no longer move together the way they once did.
Even that line keeps narrowing. Coterra's merger with Devon Energy, finalized in May 2026 in a $22-billion deal OGJ first reported when it was announced in February, creates one of the largest pure-play upstream independents in the industry: a company with the asset base of a major and none of its downstream footprint. If that trend holds, the 2027 OGJ50 will not only look different than this year's, but it will also offer one more reminder that size alone no longer offers a clear-cut tell to distinguish the category to which a company belongs.
About the Author
Laura Bell-Hammer
Statistics Editor
Laura Bell-Hammer is the Statistics Editor for Oil & Gas Journal, where she has led the publication’s global data coverage and analytical reporting for more than three decades. She previously served as OGJ’s Survey Editor and had contributed to Oil & Gas Financial Journal before publication ceased in 2017. Before joining OGJ, she developed her industry foundation at Vintage Petroleum in Tulsa. Laura is a graduate of Oklahoma State University with a Bachelor of Science in Business Administration.