Largest Industrial IPO in Nearly Three Decades: Madison Air Soars 18% on First Day, Riding the AI Cooling Wave

Chicago-based industrial cooling system manufacturer Madison Air Solutions completed its U.S. listing on Thursday, raising $2.23 billion and setting a record for the largest industrial IPO in the U.S. in nearly three decades, with shares surging 18% on the first day—a clear signal of capital markets' continued bets on the AI infrastructure boom. Trading under the ticker MAIR, the company's stock opened at $27 per share and closed at $31.75 on Thursday, valuing the firm at $15.5 billion. In pre-market trading, the price held steady near $32. The strong first-day performance indicates that investors are actively seeking industrial assets directly linked to AI data center expansion. Madison Air's core appeal lies in its data center cooling business—supplying liquid cooling, hybrid cooling, and air cooling equipment to data centers, directly aligning it with the current wave of AI infrastructure development. Goldman Sachs analyst Mark Delaney recently noted that capital expenditures by top public hyperscale cloud providers on data centers have approached $700 billion, roughly ten times the 2020 level. This trend suggests that as chip computing power continues to rise and energy consumption and cooling demands increase, cooling equipment suppliers will continue to benefit. Business Portfolio: 30 Brands, with Data Centers Accounting for 20% Madison Air operates 30 brands, offering products covering ventilation, filtration, and cooling systems across diverse scenarios including data centers, semiconductor manufacturing facilities, life sciences buildings, and commercial properties. Among these, the data center segment accounts for approximately 20% of total revenue and serves as the core driver behind the current market valuation premium. From a financial perspective, the company reported fiscal year 2025 revenue of $3.34 billion, up approximately 27% from $2.62 billion the previous year. However, net profit declined, falling from $236 million to $124 million, reflecting margin pressure. Tariff Pressures: Import Metal Costs Rise by Over $51 Million Despite rapid revenue growth, Madison Air's profit margins have been significantly squeezed by the Trump administration's tariff policies. The company disclosed that import metal costs increased by over $51 million last year, mirroring the rising cost pressures faced by many industrial companies operating in the U.S. The year-over-year decline in net profit partially reflects the impact of this external policy environment. Sector Heating Up: Data Center Cooling Becomes a New Favorite for Capital Markets Madison Air's successful IPO is the latest testament to the growing momentum in the data center cooling sector. Prior to this, chemical company Chemours gained market attention due to its positioning in data center cooling fluids; UBS analyst Joshua Spector had previously issued a bullish rating on the stock, which has surged 94% year-to-date. As demand for AI computing power accelerates, capital expenditures for hyperscale data centers continue to hit new highs. As an indispensable component of infrastructure, heat dissipation and cooling are attracting increasing institutional investment. Madison Air's strong market reception following its IPO further confirms investor confidence in this thematic opportunity.