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Rimrock Resource Partners LLC
Rimrock Resource Partners LLC was formed in 2015, anchored by capital commitments from Post Oak Energy Capital and Ceja Corporation.
Rimrock Resource Partners LLC
Rimrock Resource Partners LLC was formed in 2015, anchored by capital commitments from Post Oak Energy Capital and Ceja Corporation. Ceja Corporation is a private family-held entity, making Rimrock effectively a single-family office channeled into energy investments. The firm targets exploration, acquisition, and development opportunities primarily in the Mid-Continent Region of the United States. Its asset-class mix includes upstream oil and gas assets, infrastructure, and mineral rights, with an operating-company structure managed by Rimrock Resource Operating, LLC. No public portfolio companies or deal-level disclosures exist outside of the firm's stated geographic and operational focus. Team size and additional offices are not publicly disclosed. The firm's structure fuses an operating company with an investment vehicle, allowing direct capital deployment into resource projects. No philanthropic or adjacent vehicles have been named. The distinguishing feature of Rimrock is its capital base combining a family office (Ceja Corporation) with an institutional energy private-equity partner (Post Oak Energy Capital), creating a hybrid that blends patient family capital with disciplined PE oversight. This dual-source funding model is relatively rare among single-family offices in the energy sector.
General information
Firm type
Single Family Office
Year founded
2015
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Tulsa
Corporate office
Tulsa, OK, United States
Principals
Post Oak Energy Capital
Capital Partner
Ceja Corporation
Capital Partner
Sector focus
Frequently asked questions
Who makes investment decisions at Rimrock Resource Partners?
Investment decisions are led by the partnership between Post Oak Energy Capital and Ceja Corporation. The firm does not publicly name individual investment professionals or a CIO. Rimrock Resource Operating, LLC manages day-to-day operations and asset management.
Is Rimrock Resource Partners a single-family office or a partnership?
Rimrock is structurally a single-family office backed by Ceja Corporation family capital, but it operates with institutional co-investment from Post Oak Energy Capital. This hybrid structure gives it patient capital access while maintaining operational discipline.
What geographic regions does Rimrock invest in?
The firm focuses primarily on the Mid-Continent Region of the United States, which includes parts of Oklahoma, Kansas, Texas, and surrounding states. No international investments have been disclosed.
Does Rimrock Resource Partners invest in public equities or only private assets?
Rimrock focuses exclusively on private energy investments, specifically exploration, acquisition, and development of oil and gas assets. It does not publicly disclose any public equity or fixed-income holdings.
What is the relationship between Rimrock Resource Operating and Rimrock Resource Partners?
Rimrock Resource Operating, LLC is the management and operating arm formed in 2015 to manage and operate the investments made by Rimrock Resource Partners, LLC. The operating company handles day-to-day asset management and project execution.
How does Rimrock's structure differ from other family offices in energy?
Rimrock combines family capital from Ceja Corporation with institutional capital from Post Oak Energy Capital, a dedicated energy PE firm. This dual-source funding model is uncommon among single-family offices, which typically rely solely on family wealth.
Where does the underlying wealth for Rimrock come from?
The capital comes from Ceja Corporation, a private family-controlled entity. The specific family branch or industry origin of Ceja's wealth has not been publicly disclosed beyond its corporate form.
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