Siemens Energy's Order Book Tops €162 Billion as Data Center Demand Spills Beyond AI

Siemens Energy signs 1 GW turbine deal for data centers, backlog hits €162B, and wind unit turns profitable.

The race to power the world's data centers has quietly reshaped Siemens Energy's industrial profile, and the latest evidence arrived not in a quarterly filing but in a supply agreement that speaks volumes about where the growth is coming from.

The Munich-based group has signed a deal with Babcock & Wilcox covering 20 steam turbine-generator sets with a combined capacity of one gigawatt, earmarked for the company's FastPower program that supplies electricity to data centers. The agreement extends an existing relationship between the two companies and underscores how deeply the data center buildout has penetrated Siemens Energy's order pipeline.

That pipeline, by any measure, is bulging. The order backlog reached €162 billion at the end of the third quarter of fiscal 2026, with a book-to-bill ratio of 1.57 — meaning every euro of revenue was matched by more than one and a half euros of new orders. In the quarter reported on August 5, incoming orders hit €17.9 billion, comparable revenue rose 18.5 percent to €11.4 billion, and adjusted profit more than tripled against the prior-year period.

Analysts at Bernstein Research added Siemens Energy to their "Top Picks" list last Wednesday, pointing to a dynamic that extends beyond the record quarterly numbers: demand for energy infrastructure serving data centers is still outstripping expectations, and the momentum is now reaching segments beyond pure artificial intelligence-related demand. The order book's trajectory, they argue, reflects sustained demand rather than a handful of outsized projects.

The manufacturing footprint is being scaled accordingly. Around 30 additional mid-sized gas turbine units have come online since 2025, with another 20 planned by 2028. For large gas turbines, fifteen additional units are slated by 2027. Delivery times now stretch beyond three years — a telling indicator of how fully the production pipeline is committed. Grid Technologies, the grid equipment division, is targeting a 50 percent capacity increase for transformers and gas-insulated switchgear by 2030, with its own order backlog standing at €51 billion.

There was also a notable milestone buried in the quarterly numbers: Siemens Gamesa, the wind power subsidiary long regarded as the company's biggest liability, posted its first profit since fiscal 2022. The turnaround marks a decisive shift for a business that had dragged on group results for years, compounded by warranty problems and liquidity concerns that prompted S&P Global Ratings to only recently restore the company's credit standing. The agency lifted the long-term rating to BBB+ in early July.

The market's response to all this has been measured. The shares have slipped 1.3 percent since the quarterly report, closing Friday at €161.00, down 0.4 percent on the day. Over seven days, however, the stock is still up 4.9 percent, and the year-to-date gain stands at 34 percent. Over twelve months, the advance is a more striking 64 percent. The stock remains 18 percent below its April record high of €195.38, a gap that could narrow quickly given the stock's annualized volatility of 54 percent.

The recent pause looks less like skepticism than a breather after a strong run — much of the good news had already been priced in ahead of the numbers. With a market capitalization of €136.75 billion, Siemens Energy now ranks among Europe's largest industrial companies.

Management reaffirmed its upgraded guidance for the current fiscal year: comparable revenue growth of 14 to 16 percent and an adjusted margin of 10 to 12 percent, with the bias toward the upper end. New medium-term targets through fiscal 2030 are promised for November, a date that will show whether the data center boom translates into durable long-term growth ambitions.