The largest industrial IPO in nearly thirty years emerges: Madison Air surges 18% on its first day, fueled by AI cooling demand.

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Madison Air Solutions, an industrial cooling systems manufacturer headquartered in Chicago, completed its IPO on the U.S. stock market on Thursday, raising $2.23 billion—the largest industrial IPO in the U.S. in nearly thirty years. The stock surged 18% on its first day, reflecting the ongoing capital market bet on the AI infrastructure boom.

The company’s stock symbol is MAIR, with an issuance price of $27. On Thursday, it closed at $31.75, with a market capitalization of $15.5 billion. In pre-market trading, the price further stabilized around $32. The strong debut indicates investors are actively seeking industrial targets directly linked to AI data center expansion.

Madison Air’s core appeal lies in its data center cooling business—the company provides liquid cooling, hybrid cooling, and air cooling equipment to data centers, directly tying it to the current AI infrastructure boom. Goldman Sachs analyst Mark Delaney recently pointed out that capital expenditures for top publicly listed hyperscale cloud computing providers’ data centers have reached nearly $700 billion, about ten times the 2020 level. This trend suggests that as chip computing power continues to grow, and energy consumption and cooling demands rise, relevant cooling equipment suppliers will continue to benefit.

Business Landscape: 30 Brands, Data Centers Account for 20%

Madison Air operates 30 brands, with products covering ventilation, filtration, and cooling systems, serving scenarios such as data centers, semiconductor manufacturing facilities, life science buildings, and commercial buildings. Among them, data center business accounts for about 20% of the company’s total revenue, and is the core segment driving current market valuation premiums.

Looking at the financials, the company’s 2025 fiscal year revenue reached $3.34 billion, an increase of about 27% from $2.62 billion the previous year. However, net profit declined from $236 million to $124 million, with profitability under pressure.

Tariff Pressure: Imported Metal Costs Up Over $51 million

Despite rapid revenue growth, Madison Air’s profit margins remain significantly squeezed by the Trump administration’s tariff policies. The company disclosed that imported metal costs increased by more than $51 million last year, facing similar cost pressures as many U.S.-operating industrial firms. The year-on-year decline in net profit partly reflects the impact of this external policy environment.

Heating Up: Data Center Cooling Becomes New Capital Market Favorite

Madison Air’s successful IPO is the latest testament to the heating up of the data center cooling sector. Previously, chemical company Chemours attracted market attention for its layout in data center cooling fluids. According to reports, UBS analyst Joshua Spector gave it a bullish rating, and Chemours’ stock has risen 94% this year.

As demand for AI computing power accelerates, capital expenditures for hyperscale data centers continue to hit new highs. As an indispensable supporting infrastructure, thermal dissipation and cooling are attracting increasing institutional capital. Madison Air’s IPO response further confirms investors’ strong recognition of this theme.

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