ONEOK has agreed to buy Brazos Midstream’s Permian Midland Basin gas gathering and processing assets for $4.425 billion, financed through a separate $9 billion nonvoting minority investment from Apollo-managed funds. The structure also directs about $5 billion toward debt reduction, making this as much a balance-sheet transaction as an acquisition.

Key takeaways

  • ONEOK signed a definitive agreement for 100% of Brazos Midland LLC at a $4.425 billion base cash price, subject to adjustments.
  • Apollo-managed funds will invest $9 billion in a nonvoting Class B interest in a new ONEOK holding company.
  • ONEOK plans to use roughly $5 billion to repay debt and says pro forma 2027 leverage should fall to about 3.25 times debt-to-EBITDA.
  • The asset purchase is expected to close in the fourth quarter of 2026, subject to customary conditions and antitrust clearance.

ONEOK Brazos deal facts

Term Confirmed detail
Brazos asset price $4.425 billion in cash, before customary adjustments
Apollo investment $9 billion nonvoting minority equity
Planned debt reduction Approximately $5 billion
Acquired footprint About 700 miles of gathering infrastructure after current projects
Processing capacity Expected 1.2 Bcf per day after Cassidy II enters service
Target close Fourth quarter of 2026

The transaction was announced on August 30 and documented in ONEOK’s filing with the U.S. Securities and Exchange Commission. Reuters, Bloomberg, Fortune, S&P Global Ratings and industry publications separately reported or assessed the agreement. The deal is signed, but it has not yet closed.

That status matters because the acquisition still requires customary closing conditions, including clearance under the Hart-Scott-Rodino Act. ONEOK says the Apollo investment is expected to close in the first half of September, while the Brazos purchase is targeted for the fourth quarter.

How the nine billion dollar Apollo investment is allocatedA flow diagram showing 4.425 billion dollars for the Brazos asset purchase and approximately 5 billion dollars for debt reduction.The $9 billion capital mechanismApollo funds$9BONEOKnew holdingcompanyBrazos purchase$4.425BDebt reductionabout $5BNot common stock: Apollo receives a nonvoting Class B minority interestAmounts do not sum exactly because debt use is approximate and transaction costs apply

Why ONEOK chose minority capital instead of common shares

The unusual feature is not merely the size of the acquisition. It is the financing. Apollo will receive 900 million Class B units in a newly formed holding company, according to the SEC filing. The interest has no board representation or liquidation preference and sits structurally below ONEOK’s senior debt.

ONEOK says the investment’s internal rate of return is capped at 7% for the first nine years. The Class B interest is expected to receive 15% of quarterly operating cash flow, with distributions above the capped return reducing Apollo’s capital account. ONEOK can elect, subject to conditions, to increase that quarterly share to as much as 20% to accelerate the paydown.

In plain language, ONEOK is bringing in a large minority capital partner without issuing common shares to the public. Apollo gets a contractually structured path to distributions, while ONEOK says value created above the capped return accrues to common shareholders as the minority capital balance declines.

This resembles the broader trend of private capital supplying bespoke financing to large companies, though the terms differ from ordinary buyouts. Lapaas Voice has also examined the mechanics of the Aon–USI middle-market insurance transaction and Goldman’s NEOS Investments deal. In each case, the capital structure matters as much as the headline valuation.

What ONEOK is buying from Brazos Midstream

Brazos Midland is a gathering and processing system in the Midland portion of the Permian Basin. Gathering lines collect raw natural gas from producing areas; processing plants remove impurities and separate natural gas liquids before market delivery. These are fee-generating infrastructure assets rather than ownership of the underground reserves themselves.

ONEOK says the system is supported by about 600,000 dedicated acres under long-term, fixed-fee contracts with a weighted-average remaining term of more than 12 years. It cited 14 active rigs from producers including ExxonMobil, Diamondback Energy and Double Eagle. Those figures are company disclosures, not guarantees of future volumes.

After the Cassidy II plant is expected to enter service in the third quarter of 2027, the acquired network should include roughly 700 miles of gathering infrastructure and 1.2 billion cubic feet per day of processing capacity across seven Midland Basin counties. ONEOK says the combination will more than double its Midland processing capacity to about 2.3 Bcf per day, including facilities still under construction.

Brazos assets in the natural gas value chainA four-stage flow from wells through gathering and processing to ONEOK downstream connections.The infrastructure ONEOK is addingProducer wellsDedicated acreagesupplies volumesGatheringAbout 700 milesafter build-outProcessing1.2 Bcf/dayplanned capacityConnectionsGas and NGLmarket routesThe acquired assets gather and process gas; they do not own the reservesCapacity includes the Cassidy II plant expected in 2027

AI demand is context, not a deal condition

Fortune framed the transaction as part of a U.S. pipeline consolidation wave tied to rising domestic gas needs, LNG exports and power demand from AI data centres. That is a useful industry context, but the definitive documents do not make the acquisition contingent on a specific AI customer or data-centre contract.

ONEOK’s announcement refers to expanding domestic and international energy demand. The company also points to the Permian Basin’s expected production growth and the benefits of connecting gathering, processing, natural gas liquids transport and downstream infrastructure. Those are broader drivers than AI alone.

The ONEOK Brazos deal is not a direct purchase of an AI power project. It is an acquisition of gas gathering and processing infrastructure that could benefit if Permian production and downstream demand rise, including demand from exports, industry and gas-fired generation serving data centres.

This distinction avoids turning a plausible demand theme into a confirmed customer claim. It also connects to India’s own data-centre investment and power-demand debate: computing growth can reshape energy infrastructure, but capacity forecasts are not the same as signed revenues.

How the deal changes ONEOK’s leverage

ONEOK intends to extinguish about $5 billion of debt using the Apollo proceeds. The plan includes repayments, make-whole calls and a tender offer for senior notes. The company also said it would repay a $1.2 billion term loan and target other debt securities.

Management projects pro forma 2027 leverage of about 3.25 times debt-to-EBITDA. S&P Global Ratings placed ONEOK’s BBB rating on CreditWatch with positive implications and said it expected adjusted leverage below 3.5 times in 2027 and beyond, compared with its earlier forecast around 4 times to 4.25 times.

The rating action is supportive but not a final upgrade. It reflects S&P’s assessment of the financing and expected credit metrics. Actual leverage will depend on closing, debt repayment, operating cash flow, integration, capital spending and the performance of both existing and acquired assets.

ONEOK leverage expectations after the transactionA comparison of prior S and P expectations, updated S and P expectations, and ONEOK’s company target.Leverage expectations for 20270x1x2x3x4x4.0–4.25xbelow 3.5xabout 3.25xPrior S&PforecastUpdated S&PexpectationONEOKcompany targetForecasts are not guarantees; definitions may differ

Valuation, synergies and the execution test

ONEOK estimates the purchase price at about 7.5 times projected 2027 EBITDA, including roughly $80 million of full-year synergies, and about 6 times projected 2028 EBITDA. These are forward-looking company estimates. They depend on volume growth, integration and capital efficiencies that have not yet been realised.

The company expects the acquisition to add immediately to earnings and free cash flow per share after closing. It also sees commercial benefits from connecting Brazos with its West Texas natural gas liquids pipeline and the Medford fractionation facility. Investors should watch whether those connections increase throughput without requiring more capital than expected.

Everyone else is reporting a $4.4 billion pipeline acquisition; we are explaining how a $9 billion minority-capital structure simultaneously buys assets and reduces debt. That financing design is the distinctive feature of the transaction and the reason rating agencies are treating it differently from a debt-funded acquisition.

What could still change

  • Regulatory timing: the acquisition remains subject to antitrust clearance and customary conditions.
  • Purchase price: $4.425 billion is the base price and can change through closing adjustments.
  • Construction: the stated 1.2 Bcf/day capacity includes Cassidy II, which is expected rather than operating today.
  • Synergies: the $80 million estimate and lower future valuation multiple are management forecasts.
  • Capital paydown: the speed at which Apollo’s Class B balance declines depends on future distributions and operating cash flow.

Primary documents include ONEOK’s transaction announcement and its Form 8-K filing. Independent checks included Reuters, Bloomberg, Fortune, S&P Global Ratings, GlobalData and MT Newswires coverage.

Frequently asked questions

How much is ONEOK paying for Brazos Midstream assets?

ONEOK agreed to a $4.425 billion base cash price for Brazos Midland LLC, subject to customary closing and post-closing adjustments.

Why is Apollo investing $9 billion?

The investment finances the Brazos acquisition and allows ONEOK to use about $5 billion to reduce debt. Apollo receives a nonvoting Class B minority interest in a new holding company.

Has the ONEOK Brazos acquisition closed?

No. ONEOK expects the asset acquisition to close in the fourth quarter of 2026, subject to regulatory clearance and other customary conditions.

Is the deal directly tied to an AI data centre?

No direct AI customer or data-centre contract was identified in the definitive transaction documents. AI-related electricity demand is part of the wider gas-demand context, not a condition of the deal.

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