Williams Companies is finalizing a $5.5 billion acquisition of Momentum Midstream's Haynesville Basin pipeline network, the largest midstream transaction since 2023 and a direct wager on natural gas as the fuel source for AI data center expansion. The deal gives Williams control of 1.5 billion cubic feet per day of takeaway capacity from the Haynesville shale formation straddling Louisiana and Texas, positioning the Tulsa-based operator as the dominant transporter from the lowest-cost gas basin to the Gulf Coast power grid.
The transaction closes in Q2 2025 pending FERC review. Williams will inherit Momentum's 680-mile pipeline system connecting Haynesville producers to LNG export terminals and, critically, to planned data center clusters in Louisiana and East Texas. The company is financing the purchase with $3.2 billion in new term debt and $2.3 billion in equity, a conservative structure that maintains Williams' BBB+ credit rating and suggests management expects contract revenue within eighteen months. Momentum Midstream, backed by I Squared Capital since 2018, exits with a 2.4x cash-on-cash return after building the system specifically to serve the post-2020 LNG buildout.
The timing matters because hyperscalers are now locking in gas supply commitments before breaking ground on compute facilities. Microsoft, Amazon, and Google have collectively announced 47 gigawatts of new data center capacity across the southern U.S. through 2028, and 82% of that capacity will run on gas-fired generation according to grid interconnection filings. Natural gas burns cleaner than coal, spins up faster than nuclear, and doesn't require the permitting gauntlet that new transmission lines face. Williams now controls the artery from the cheapest gas in North America to the region where land, water, and utility cooperation align for AI infrastructure. The Haynesville basin delivers gas at $2.10 per MMBtu all-in cost versus $3.40 for Marcellus gas routed south, a $1.30 margin that makes Gulf Coast data centers structurally advantaged over Virginia or Ohio builds.
Allocators should watch three developments over the next six months. First, whether Williams announces a dedicated data center services contract before the deal closes—management signaled on the February earnings call that "commercial discussions with compute infrastructure customers" were underway. Second, whether Haynesville rig counts, currently at 58, move above 70 by mid-year, indicating producers are ramping to meet the new pipeline capacity. Third, whether Williams enters a joint venture with a hyperscaler to co-develop generation assets, a structure that would shift the company from transport-only to integrated energy provider and change the risk profile entirely. Any of those moves would confirm this acquisition as infrastructure positioning, not cyclical commodity exposure.
The Haynesville formation holds 304 trillion cubic feet of proven reserves, enough to supply the entire announced data center pipeline for thirty-three years at current burn rates, and Williams just bought the toll road.