The Overlooked Utility Quietly Compounding as AI Drives a 20-Year Power Boom
Long before the artificial intelligence buildout captured Wall Street’s imagination, utility companies were considered the boring backbone of a long-term investor’s dividend portfolio — reliable, unspectacular, and easy to overlook. National Grid plc (NYSE: NGG) is proving that the boring and the consequential are not mutually exclusive. On July 1, the British-American utility confirmed a $1.75 billion investment for a 35% stake in Joulent, a U.S. energy infrastructure platform whose first project will supply a 2.67-gigawatt gas-fired facility in West Texas directly to a Microsoft-operated data center campus — under a 20-year power purchase agreement. That last detail is worth sitting with. This isn’t speculative capex chasing a trend. It’s contracted, long-duration cash flow locked in at a scale that matters.
The Joulent investment is just one piece of a much larger picture. National Grid has committed to a five-year capital investment program of at least £70 billion through fiscal year 2031, with plans to connect more than 10 gigawatts of power capacity across the UK and the United States over that period. The $1.75 billion stake in Joulent is explicitly incremental to that program — meaning the core business continues its steady expansion while this new AI-driven infrastructure play adds an additional growth vector. Renaissance Technologies, the quantitative giant run by the late Jim Simons, held NGG as one of its top dividend stock positions, drawn in part by its 3.91% dividend yield. For patient investors, the combination of a near-4% yield and a capital investment program of this magnitude is precisely the kind of compounding engine that tends to be underappreciated during periods when markets are chasing faster-moving stories.
The deeper insight here is structural. The AI data center buildout is consuming electricity at a rate that utility infrastructure simply wasn’t designed to handle. Data centers that once drew 20 to 40 megawatts are now being designed at 500 megawatts and above — a more than tenfold increase in power density per campus. Microsoft alone has committed to $80 billion in data center spending in fiscal year 2026. The power has to come from somewhere, and it has to be reliable. National Grid sits at exactly that intersection: a regulated utility with decades of operational expertise in transmission and distribution, now pivoting to anchor long-term power purchase agreements with the world’s largest technology companies. The regulatory moat is wide, the counterparties are creditworthy, and the demand curve is not reversing. For long-term investors, the question isn’t whether AI will need more power — it unambiguously will. The question is which infrastructure companies have the balance sheet, the regulatory relationships, and the operational know-how to be paid for supplying it over the next two decades. National Grid’s $1.75 billion bet on Joulent, and the 20-year contract underpinning it, suggests the answer is already being quietly assembled.
