Their 2027 figure is now 50 gigawatts

The byline date is October 19, 2026. The authors are Jeremie Eliahou Ontiveros, Reyk Knuhtsen, and Dylan Patel, and the page is marked paid. They write that Brad Gerstner of Altimeter recently cited SemiAnalysis’s forecast of 43 gigawatts added in 2027 and called that figure too aggressive. Gerstner’s own estimate was about 25 gigawatts, which they say rested on his hunch. The title of this piece is now an addition of 50 gigawatts in a single year.

The construction figure in the free text is not that 50. They say one picture shows more than 24 gigawatts of datacenters in an advanced stage of construction, all to be delivered in 2027. Most are more than halfway done, with exterior cooling and electrical equipment already installed. They add that the picture is only 40 campuses, while several hundred sites are in an advanced stage of construction. The subtitle separately says 60 gigawatts are under construction. The 24, the 50, and the 60 are not one measure, and they are not subtracted here. The figures come from their Datacenter Industry Model, not an outside audit.

The lease dollars in the free text are not one number either. The subtitle says 1.3 trillion dollars of lease contracts signed year to date. One sentence in the body says slightly under 1 trillion dollars of binding, non-cancellable datacenter leases have been signed year to date. Another says they have identified over a trillion dollars of lease value signed and closed in 2026. This piece uses none of the three. How power is supplied, where the addition lands, and whether there will be a surplus sit behind the subscription wall. The free page does not show them.