The Cooling Field: Leading With Eleven PercentNarrow moat
Vertiv Holdings (VRT) — moat facet
Leading a market with 11% share is not dominance — it is a fragmented field that no one has learned to own yet.
Vertiv led the data-center liquid-cooling market in 2025 with more than 11.3% share1. That sentence contains both the achievement and the problem: the leader of the market Vertiv is most celebrated for holds roughly a ninth of it, and the top five players — Schneider, Vertiv, Rittal, Stulz and Boyd — together hold only about 35%.
This is a genuinely different competitive structure from power. In UPS and switchgear, Vertiv faces two large, well-known opponents. In cooling it faces dozens: the four named above plus Johnson Controls, Trane, Carrier, Daikin, Danfoss, Modine and CoolIT, several of them subsidiaries of far larger thermal companies with decades of heat-transfer engineering behind them2. Fragmentation of that degree means no one has a durable technology lead, and price discipline is difficult to maintain.
What makes it worth holding anyway is the growth: liquid cooling is forecast to expand from about $5.5 billion in 2025 to nearly $18.8 billion by 2031. Vertiv's chosen response has been to buy rather than out-engineer — roughly $1.0 billion for PurgeRite in December 2025, plus up to $250 million contingent on 2026 performance3, and around $200 million for Great Lakes.
Watch share, not revenue. In a market growing above 20% a year, Vertiv's cooling revenue will rise whatever happens to its position. Only the share number distinguishes a company winning a market from one being carried by it — and 11% is not yet leadership in any meaningful sense.
Vertiv is consolidating a fragmented market rather than out-engineering it: PurgeRite for roughly $1.0 billion, Great Lakes for around $200 million, and a liquid-cooling share that leads the field. In a market forecast to more than triple by 2031, buying capability and capacity early is a defensible strategy — provided the prices paid stay sensible. Widening, on the acquisitions rather than on the technology.
The leader of Vertiv's most-celebrated market holds roughly a ninth of it, and the top five together hold about 35%. In a market forecast to grow from ~$5.5B in 2025 to ~$18.8B by 2031, cooling revenue will rise regardless. Only share distinguishes winning the market from being carried by it.
Source: Third-party data-center liquid-cooling market share estimates ↗- Third-party estimateVertiv led liquid cooling with >11.3% share in 2025; top five ~35%; market ~$5.5B in 2025 to ~$18.8B by 2031.Third-party data-center liquid-cooling market research — Vertiv led the data-center liquid cooling market with more than 11.3% share in 2025; the top five players (Schneider Electric, Vertiv, Rittal, Stulz and Boyd) together held about 35%; other named participants include Johnson Controls, Trane Technologies, Carrier, Daikin, Danfoss, Airedale by Modine and CoolIT Systems; the market was valued at about $5.52B in 2025 and is forecast to reach roughly $18.79B by 2031 — 2025-2031 · publ. 2026 · source ↗
- Third-party estimateOther cooling competitors include Johnson Controls, Trane, Carrier, Daikin, Danfoss, Modine and CoolIT.Third-party data-center liquid-cooling market research — Vertiv led the data-center liquid cooling market with more than 11.3% share in 2025; the top five players (Schneider Electric, Vertiv, Rittal, Stulz and Boyd) together held about 35%; other named participants include Johnson Controls, Trane Technologies, Carrier, Daikin, Danfoss, Airedale by Modine and CoolIT Systems; the market was valued at about $5.52B in 2025 and is forecast to reach roughly $18.79B by 2031 — 2025-2031 · publ. 2026 · source ↗
- ReportedVertiv paid ~$1.0B for PurgeRite in December 2025 plus up to $250M contingent on 2026 performance.Vertiv press release — completion of the PurgeRite acquisition (December 4, 2025): ~$1.0B cash at closing plus up to $250M contingent on 2026 performance metrics; PurgeRite provides mechanical flushing, purging and filtration services for liquid-cooling loops — December 2025 · publ. December 4, 2025 · source ↗
- Vertiv Holdings Form 10-K filings — Business & Risk Factors (SEC EDGAR)
- Data-center liquid cooling market share and forecast (MarketsandMarkets)