Key Highlights

  • Alliant Energy (NASDAQ:LNT) raised its 2027 to 2030 Capital plan by 19% to USD 15.9 billion, citing 3.4 gigawatts of contracted data-center demand, as reported.
  • American Electric Power (NASDAQ:AEP) lifted its plan by 30% to USD 100 billion, a figure dated Thursday that comes from a single recap and is unconfirmed.
  • Solaris Energy (NYSE:SEI) announced about 900 megawatts of generation for an investment-grade customer on 15-year terms from the first half of 2027, with pricing undisclosed.
  • The Utilities Select Sector SPDR Fund (NYSEARCA:XLU) was up 0.7% in premarket trading on October 30, 2026, a modest move for the sector as a whole.

Two Big Utilities Raise Their Plans

Alliant Energy (NASDAQ:LNT) lifted its 2027 to 2030 capital plan by 19% to USD 15.9 billion, and said it has 3.4 gigawatts of contracted data-center demand. Simple arithmetic implies the prior plan was about USD 13.4 billion. American Electric Power raised its plan by 30% to USD 100 billion, implying a prior figure near USD 76.9 billion on the same arithmetic. Both figures come from single recaps, and the American Electric Power plan is dated Thursday, October 29, 2026. The common thread is Demand from data centers that need large, steady power supply. Utilities have long been seen as slow-growth defensive holdings, so plans of this size challenge that image.

How Capital Plans Connect to Data Centers

Regulated utilities earn a return on the capital they invest in approved assets, called the rate base. When a customer such as a Data Center signs a long-term contract, the Utility can justify building generation and grid capacity, and a larger plan generally means a larger rate base over time. Solaris Energy announced about 900 megawatts of generation for an investment-grade customer, with 15-year terms from the first half of 2027. Terms and pricing were not disclosed, so the Economics are unknown. The mechanism is attractive, but it depends on regulators approving cost recovery. Generation built for one customer under a long contract can reduce the risk of idle capacity, which is why 15-year terms stand out.

Risks and What to Watch Next

Bigger plans require financing through Debt and equity, and with the 10-year Yield near 4.94% to 4.98% the Cost of Capital is elevated. Regulators may push back on rate increases for households, and contracted demand can slip if projects are delayed or cancelled. Alliant Energy and American Electric Power plans are targets, not guarantees. The Utilities Select Sector SPDR Fund (NYSEARCA:XLU) rose 0.7% in premarket, a modest move. Watch rate cases, financing announcements and whether more utilities raise plans as data-center demand is contracted. Utility plans also depend on Supply chains for turbines and transformers, which can lengthen build times and raise costs. Readers should confirm each figure in the company filing before relying on it.

Where Things Stand

Alliant Energy (NASDAQ:LNT) lifted its plan 19% because it says 3.4 gigawatts of data-center demand is contracted for 2027 to 2030, and American Electric Power did the same on a larger scale. The evidence is consistent across the sector, but the figures are single-recap and terms were not disclosed for Solaris. The balance favors a real demand signal tempered by financing and regulatory risk. The next catalyst is rate-case decisions and further plan updates from peers. Both utility figures are single-recap. Solaris Energy adds a concrete example of generation being built for a single long-term customer.