Siemens DI Raises Guidance as PLC Demand Fuels Record €124B Backlog
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Siemens DI Raises Guidance as PLC Demand Fuels Record €124B Backlog
The global industrial automation and PLC market is entering a super-cycle of demand, and Siemens AG's latest earnings call provides the clearest signal yet. With a record-shattering €124 billion group backlog and its Digital Industries (DI) segment , home to the flagship SIMATIC PLC portfolio , raising both revenue and profit guidance, the data points to a fundamental expansion in automation inves
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Siemens' book-to-bill ratio of 1.22 signals sustained demand outstripping supply , a bullish indicator for the PLC and factory automation supply chain through at least H2 2025. When backlog grows faster than revenue, price discipline and margin expansion typically follow.
Siemens reported group orders of €24.1 billion for the period , an 18% year-over-year surge , with the Smart Infrastructure division alone posting a 35% jump to €7.5 billion. But it is the Digital Industries segment that commands attention from the industrial automation and PLC market.
DI profitability reached 18.5%, while free cash flow climbed to €760 million. Management responded by raising the full-year revenue growth forecast to a band of 7, 10% and the profit margin target to 17, 19% , a rare mid-cycle upward revision that underscores the depth of demand for automation hardware, software, and services.
The 45% surge in data center-related revenue (€1.8 billion in H1) reveals a structural demand driver for PLC and automation systems. Hyperscale cloud and AI infrastructure expansion requires advanced power distribution, cooling controls, and building automation , all heavy users of industrial PLC architectures.
One of the most striking disclosures was the 45% growth in data center-related revenue , reaching €1.8 billion in the first half alone. This vertical, while not traditionally associated with discrete manufacturing PLCs, is increasingly reliant on industrial-grade automation for power management, thermal regulation, and operational resilience.
Siemens' ability to cross-sell its SIMATIC PLC and automation portfolio into this adjacent market reflects the blurring lines between factory floors and digital infrastructure. As AI workloads drive unprecedented data center construction, the demand for reliable, deterministic control systems is pulling the PLC market upward alongside it.
The Smart Infrastructure segment posted a book-to-bill ratio of 1.27 on a €22 billion backlog , outpacing even the group average. This division, which covers building automation, electrification, and grid-edge solutions, is a significant consumer of PLC and distributed control technologies.
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