AI Data Center Boom: 3 Behind the Scenes Names Protecting Headline Chipmakers

Alex Sirois

Mon, May 18, 2026 at 9:57 AM EDT 4 min read

Quick Read

• NVIDIA (NVDA) owns the AI narrative, but thermal runaway is the real ceiling—the unglamorous cooling plays have multi-year backlogs the chip cycle can’t match.

• Vertiv (VRT) builds the power and cooling backbone keeping AI data centers from melting, with $15B backlog up 109% YoY and fresh S&P 500 inclusion.

• Comfort Systems USA (FIX) is pouring concrete and running conduit for every hyperscaler data center, with backlog doubled and dividend raised for the fourth straight quarter.

• Modine (MOD) is the pure-play thermal-management winner, guiding 50-70% annual data center growth toward $2.0B revenue by FY2028.

• The analyst who called NVIDIA in 2010 just named his top 10 stocks and Comfort Systems USA wasn't one of them. Get them here FREE.

NVIDIA (NASDAQ:NVDA) owns the AI headline cycle, the consensus long position, and a valuation priced for hyperscaler capex to compound forever. But here's what you should actually be watching.

The analyst who called NVIDIA in 2010 just named his top 10 stocks and Comfort Systems USA wasn't one of them. Get them here FREE.

The chip is the glamour layer. The unglamorous layer is the gear that keeps the chip from cooking itself. Modern AI training racks pull tens of kilowatts apiece, and thermal runaway, the point at which generated heat outruns the cooling system and silicon throttles or fails, is the hard physical ceiling on AI scale-out. The companies engineering around that ceiling sit on multi-year order books the chip cycle cannot match. Three of them deserve a retirement-focused investor's attention right now, specifically because they prevent thermal runaway in high-end AI training environments.

Vertiv: the power and cooling backbone

Vertiv Holdings (NYSE:VRT) builds the power management, liquid cooling, and air-handling systems that keep AI data centers from melting. Q1 FY26 revenue came in at $2.65 billion, up 30.13% year over year, with adjusted EPS of $1.17 beating consensus by 15.68%. Americas organic sales grew 44%, and adjusted operating margin expanded 430 basis points to 20.8%. Backlog sits at $15.0 billion, up 109% year over year, with a Q4 book-to-bill near 2.9x. Vertiv earned investment-grade ratings (Moody's Baa3, S&P BBB-) and joined the S&P 500 in March. Shares are up 109.89% year to date, and the order momentum suggests the rerate is still early.

Comfort Systems USA: builder of the rooms

Comfort Systems USA (NYSE:FIX) is the mechanical and electrical contractor pouring concrete, running conduit, and installing the HVAC systems for the data centers that house every Blackwell rack. Q1 revenue jumped 56.47% to $2.87 billion, organic growth ran at 51%, and diluted EPS of $10.51 trounced the $6.81 consensus by 54.44%, the fourth straight beat of that magnitude. Backlog hit $12.45 billion, nearly double the prior year. Data center and tech infrastructure now represents roughly 45% of company revenue. Management raised the quarterly dividend to $0.80 from $0.70, the fourth consecutive ten-cent hike. CEO Brian Lane called demand "persistent" with "strong pipelines". Forward earnings sit at 47x, rich on the surface and reasonable against a backlog that has doubled.