Illustration for: ONEOK and Williams Turn Gas Pipelines Into the New AI Trade

ONEOK and Williams Turn Gas Pipelines Into the New AI Trade

ONEOK agreed to buy Brazos Midstream's Permian assets for $4.42 billion days after Williams struck a $5.5 billion deal for Momentum Midstream, as gas gathering capacity gets repriced around AI electricity demand and LNG exports.

By the Numbers

$4.42B
ONEOK for Brazos Midstream
$5.5B
Williams for Momentum Midstream
$1.6B, May 2026
Western Midstream for Brazos assets
$9B
Apollo investment into ONEOK
~105 Bcf/d
US gas output today
TC
By the Markets Desk
Edited by Trace Cohen · Early-stage VC & angel · Founder, New York Venture Partners
2 min read
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THE RUNDOWN

1

ONEOK is paying $4.42 billion for Brazos Midstream's Permian Basin gathering and processing assets, closing days after Williams agreed to buy Momentum Midstream's Texas and Louisiana facilities for $5.5 billion

2

Apollo Global Management is funding the ONEOK side with a $9 billion investment -- $4 billion earmarked for the Brazos purchase and $5 billion toward debt reduction -- which is private credit underwriting a public midstream roll-up

3

The demand thesis is two-sided: gas-fired generation for AI data centers domestically, and LNG export capacity coming online through the late 2020s, with US output projected to climb from roughly 105 Bcf/d today toward 150 Bcf/d by 2050

4

ONEOK has now run this playbook four times -- Magellan Midstream for $18.8 billion including debt in 2023, EnLink and Medallion in 2024, and Brazos in 2026 -- making it the most acquisitive consolidator in the sector

TC

The VC Read · Trace's Take

Trace Cohen

This is the AI trade expressed by people who do not talk about AI. Ten billion dollars moved into gas gathering in a week because the fastest path to a powered rack in 2027 is a turbine, not a reactor. If you are a GP in climate or energy, the uncomfortable question your LPs will ask this quarter is why your portfolio is levered to 2032 electrons while the incumbents are buying 2027 ones. The number to track is Apollo's $5 billion debt-reduction tranche -- private credit funding a roll-up and simultaneously derisking it is not a bullish posture on rates.

Analysis

ONEOK agreed this week to acquire Brazos Midstream's Permian Basin assets, days after Williams struck a deal for Momentum Midstream's gathering and processing facilities in Texas and Louisiana, Fortune reported. The two deals alone move roughly $10 billion of midstream gas infrastructure in a single week -- terms below.

The deals are not being underwritten on shale drilling economics. They are being underwritten on electricity. Gas-fired generation is the only dispatchable capacity that can be sited and energized on the timeline AI data centers demand, which has pulled forward the value of every mile of gathering pipe and every processing plant between the wellhead and a power plant. East Daley Analytics energy analyst London Spivey has been tracking the same repricing. US production sits near 105 billion cubic feet per day and roughly 25% of world output; the long-range case runs toward 150 Bcf/d by 2050, a roughly 40% climb rather than a multiple of today's output.

The Deal Terms

The named transactions, with terms:

  • ONEOK -- Brazos Midstream Permian assets, $4.42 billion (announced the week of Sept. 2): gathering and processing in the Permian. ONEOK, led by CEO Pierce Norton II, is the sector's serial consolidator. Competitors: Williams, Energy Transfer, Targa Resources.
  • Williams -- Momentum Midstream, $5.5 billion: Texas and Louisiana gathering and processing, positioning Williams closer to Gulf Coast LNG export terminals.
  • Western Midstream -- Brazos Delaware Basin facilities, $1.6 billion (May 2026): the earlier, smaller slice of the same asset base, which is why Brazos was already a known seller.
  • Apollo Global Management -- $9 billion into ONEOK (2026): $4 billion directed at the Brazos purchase and $5 billion toward debt reduction. Private credit is now the balance sheet behind public midstream M&A.

ONEOK's history explains the pace. It bought Magellan Midstream for $18.8 billion including debt in 2023, then added EnLink Midstream and Medallion Midstream in 2024. Each deal has been justified on integration and fee-based cash flow rather than commodity exposure -- the same argument that makes midstream attractive to data center developers who want a contracted molecule, not a hedged one.

For venture investors the read-through is indirect but real. The 2025 and 2026 vintage of energy startups raised on the premise that AI load growth would be met by nuclear, geothermal and long-duration storage. The capital actually clearing this quarter is going into gas gathering assets that already exist. Fervo, X-energy, Oklo and the small modular reactor cohort are competing against a $10 billion signal that incumbents believe the near-term answer is molecules through existing pipe.

The bear case is straightforward and worth stating: midstream valuations are being set on a demand curve nobody has locked in. If hyperscaler capex plans for 2028 compress -- and Pulse has documented how much of that capacity is announced rather than interconnected -- these assets revert to being priced on LNG exports and industrial load alone. Apollo's $9 billion is structured with $5 billion going to deleveraging, which suggests at least one sophisticated party is planning for a less forgiving rate environment.

The next marker is whether Energy Transfer or Targa responds with a comparable acquisition. Consolidation waves in midstream have historically run in pairs, and the assets left unowned in the Permian are now a short list.

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Key Sources

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Reported by Fortune · First reported by Fortune · Analysis by Value Add Pulse.

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