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Private equity firm buys natural gas storage business for $650 million

Reported by The Business Journals
Jul 1, 2026· 2 min read
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Key Takeaways
  • • I Squared Capital acquired Spire Inc.'s natural gas storage assets in Wyoming and Oklahoma for $650 million, consisting of $600 million in cash at closing and a $50 million deferred payment in fiscal 2027.
  • • The divestiture allows Spire to strengthen its balance sheet and refocus on utility operations, marking a strategic shift away from midstream energy infrastructure.
  • • Deal structure includes fixed, non-contingent deferred consideration, reducing execution risk and providing Spire with immediate liquidity of $600 million at close.
  • • I Squared Capital, an infrastructure-focused private equity firm, expands its energy portfolio with geographically diversified natural gas storage assets representing critical energy infrastructure.
Summary
I Squared Capital has completed its acquisition of Spire Inc.'s natural gas storage business for $650 million, marking a significant infrastructure investment in critical energy assets. The transaction consists of $600 million in cash at closing and a $50 million fixed, non-contingent payment scheduled for fiscal 2027, providing Spire with substantial upfront capital while ensuring predictable future proceeds.

The divestiture reflects Spire's strategic repositioning toward its core utility business. By exiting the natural gas storage segment, the company aims to strengthen its financial position and concentrate resources on utility operations and customer growth. The $650 million proceeds provide Spire with enhanced financial flexibility for capital allocation and balance sheet optimization.

The acquired assets, located in Wyoming and Oklahoma, represent geographically diversified natural gas storage infrastructure—a fundamental component of North American energy systems. These assets provide I Squared Capital with stable, long-duration cash flows typical of midstream energy infrastructure. The investment aligns with the private equity firm's infrastructure-focused strategy of acquiring essential energy assets with regulated or contracted revenue streams.

Legal counsel for I Squared on the transaction included Kirkland & Ellis, underscoring the deal's institutional scale and complexity. The fixed, non-contingent structure of the $50 million deferred payment eliminates contingency risk and provides both parties with execution certainty. The transaction demonstrates continued institutional investor appetite for energy infrastructure assets, despite sectoral headwinds and energy transition considerations.

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The Business Journals Private equity firm buys natural gas storage business for $650 million