Alliant Energy is investing $13.4 billion in grid upgrades and dedicated data center power infrastructure to meet rising AI electricity demand across its Midwest footprint.

To own Alliant Energy, you need to believe in a regulated utility that can convert rising data center electricity demand into steady, rate-based investment while keeping regulators and customers satisfied. The new US$13.40 billion four-year capital plan appears incremental to this thesis rather than a sharp change, and it does not fundamentally alter the key near-term catalyst of data center load growth or the biggest current risk around equity-funded capital expenditure and potential dilution.

One of the most relevant recent updates alongside this plan is Alliant's ongoing use of at-the-market equity offerings, including the US$1.0 billion program filed in March 2026. This highlights how much of the new spending program may be supported by fresh equity, which ties directly into the dilution and return pressure risk if expected data center projects or new load do not materialize as planned.

Alliant Energy's narrative projects US$5.2 billion in revenue and US$1.2 billion in earnings by 2029. The company's forecasts yield a US$79.12 fair value estimate, representing approximately 13% upside to its current price. However, fair value estimates from the Simply Wall St Community range widely—from about US$67 to over US$94,000—demonstrating the substantial divergence in individual investor views.

Against that backdrop, Alliant's sizeable, equity-heavy US$13.40 billion data center-focused capital expenditure plan raises important questions about concentration risk and how different outcomes could affect long-term returns. Even with this large capital plan, investors should carefully consider how shifts in data center demand or regulatory treatment could impact expected returns.