BEAN.SW

Belimo addresses a large and structurally growing market, but as a deliberate niche player rather than a TAM-maximizer. Its core is the field-device layer of HVAC: actuators, control valves, sensors and meters. The durable pie is energy-efficiency retrofits, where buildings consume about 30% of global final energy, regulation such as the EU's revised EPBD keeps tightening, high-performance controls can cut HVAC energy use by around 30%, and roughly 98% of buildings are existing installed base rather than new construction each year. Layered on top is a genuinely newer market: AI data-center liquid cooling, where Belimo estimates a content opportunity of CHF 40 million to CHF 60 million per gigawatt of added capacity. So Belimo is both enlarging its slice of a huge existing pie and riding a new market, though its self-imposed focus on the component layer caps how big it can become relative to the integrated giants.

Doubling 2025 sales of CHF 1,120.8 million within five years requires a sustained local-currency CAGR of roughly 15%. Belimo guides mid-teens local-currency growth for 2026 and grew 23.3% in 2025, so the optimistic path does reach a double. But the report's own base and conservative scenarios have growth moderating to low teens and then high single digits as the data-center pulse normalizes, which lands short of a double. Growth is driven mainly by volume (data-center build-out plus retrofit), helped by some pricing and the expanding sensors-and-meters and digital range. A double is achievable only if AI-cooling demand proves structurally durable rather than reverting to an ordinary capex cycle.

The second curve already exists and is financially meaningful: data centers were about 17% of 2025 sales, are now a formal strategic pillar with a dedicated global team, an energy-valve product roadmap, and new application and experience centers in Danbury and Singapore. Beyond data centers, the sensors-and-meters expansion, the digital ecosystem around the installed base, and the multi-year New Digital Generation actuator rollout add further legs. The honest caveat is that the central uncertainty is the slope and duration of the data-center curve, not its existence: the whole stock case turns on whether 2025's acceleration is a permanent new baseline or the front-loaded phase of a capacity boom.

Belimo's moat rests on four reinforcing sources: product reliability at a tiny relative cost to the customer (a valve or actuator is cheap to buy but expensive to fail), channel neutrality (because Belimo refuses to sell the whole building stack, contractors, integrators and OEMs can buy from it without feeding a direct competitor), decades of niche application know-how, and localized service with roughly 48-hour delivery. That moat shows up as 27.8% ROIC and an 88%-outsourced, asset-light cost structure. It is strong and likely to stay wide in the legacy HVAC and retrofit franchise. The qualifier is the hot new segment: as liquid cooling becomes a systems problem rather than only a component problem, value can migrate up to broader platforms such as Schneider and Vertiv, so the moat is somewhat narrower exactly where growth is fastest.

Belimo's 50-year history is one of steady evolution within its niche: from air-side actuators to water-side control valves, then sensors and meters, then a digital layer, and now data-center cooling. It tends to reinvent by promoting long-tenured internal operators rather than importing outsiders, which preserves the playbook but is incremental rather than radical. On mistakes and bad news, management's disclosures stay comparatively restrained and sober even as the market clearly wants a bigger AI story, which is a healthy behavioral signal. The reinvention DNA is real but moderate: the company has adapted to architecture shifts, not survived an existential disruption to its core.

There is no active founder: the founders' wealth went into the charitable U.W. Linsi Foundation in 1997, and Group Linsi remains the largest holder at 19.55% of capital under a clean one-share-one-vote structure. That foundation anchor brings an unusually long time horizon and stability, even if it is not founder-operator alignment. Management is long-tenured and internally grown (CEO Lars van der Haegen since 2017, CFO Markus Schurch since 2019, chair Patrick Burkhalter since 2019). Crucially, they are demonstrably willing to sacrifice near-term profit and free cash flow for later payoff: capex rose to CHF 86.8 million in 2025 to expand capacity, innovation spending runs around 7% of sales, and they are opening test and experience centers ahead of demand.

Customers would miss Belimo acutely: its devices sit at a mission-relevant control point where reliability, fast availability and easy integration matter far more than the small invoice cost, and its neutrality means it is embedded across many system architectures and brands, so replacing it quickly across that installed base would be painful. The way it grows is also unusually clean and sustainable. Belimo makes money by helping buildings and data centers use less energy, with building automation cited as delivering 29% to 55% HVAC energy savings depending on sophistication. That puts the company on the same side as tightening efficiency regulation rather than against it, so growth does not depend on harming society or extracting from regulators.

The unit economics are excellent and improve with scale. Belimo outsources about 88% of production cost and focuses internally on assembly, logistics, engineering and customization, so it is asset-light: volume growth lifts margins through procurement, assembly and mix rather than through a heavy owned-factory base. The result is 27.8% ROIC in 2025, a 20.8% EBIT margin, and operating cash flow that exceeded net income in four of the last five years. The honest caveat is current cash conversion: elevated growth capex (CHF 86.8 million in 2025) pushed owner earnings to about CHF 12.1 per share against reported EPS of CHF 14.77, and free cash flow has been volatile. Capital goes to capacity, R&D at roughly 7% of sales, and dividends.

A five-fold rise in ten years from CHF 904 would need roughly 17% annualized price appreciation, which requires earnings to grow about five-fold and the multiple to stay near its current peak at the same time. Both at once are unrealistic. Mid-teens growth fading to low teens compounds to perhaps 3.5x-4x earnings over a decade, and the current trailing multiple of about 61x sits at the top of Belimo's own 41.6x-61.6x historical range and is far more likely to compress than to hold. The report models negative expected annualized returns at today's price (about -7% in the base case to -13% conservative, toward fair value), and a flat-earnings de-rating to a still-rich 45x implies roughly CHF 665. Today's price already discounts excellence plus a long AI-cooling runway.

For Belimo the usual Baillie angle is largely inverted: the market has not missed the story, it has embraced it. The stock re-rated to a peak multiple near 61x precisely because investors recognized the AI data-center cooling opportunity, and the narrative inflection arguably already fired (a June 2026 Morgan Stanley upgrade on stronger data-center assumptions lifted the shares about 8% in a day). The modest residual under-appreciation the report identifies is narrow: how durable the retrofit franchise is even if data-center growth cools, and how much current capex is growth rather than maintenance spending. But the dominant mispricing runs the other way, toward overvaluation, so little hidden positive is left for the market to wake up to.