TL;DR
The domestic manufacturing boom is entering its most lucrative phase as the focus shifts from empty concrete shells to highly complex internal systems. Late-stage specialty contractors, power infrastructure giants, and advanced packaging providers are capturing record-breaking cash flows and securing multi-year backlogs. As the physical buildout matures, the real financial windfall is landing with the companies providing the critical hardware and modular assemblies that make these factories run.
Late-Stage Fit-Out and Modular Assembly Capture the Real Margins
High-margin mechanical and electrical installations are generating unprecedented profitability as newly constructed industrial shells are fitted with complex operational systems.
"Our results were once again extraordinary, with 44% same-store revenue growth, approximately $1 billion in free cash flow. EBITDA that was higher than last year by 80%." — Specialty Contractors Reap High-Margin Rewards of Reshoring and Data Center Capex
(via Comfort Systems USA, Inc. (FIX) Q2 FY2026 earnings call transcript)
This shift demonstrates that the primary financial beneficiaries of reshoring are no longer civil engineering firms, but specialty contractors like Comfort Systems USA that assemble sophisticated modular systems. By securing multi-year commitments from hyperscalers, these contractors are insulated from speculative real estate downturns while generating exceptionally high returns on capital.
What to watch: Whether Comfort Systems USA can successfully expand its modular building capacity to 5 million square feet by late summer 2027 to satisfy relentless customer demand [Specialty Contractors Reap High-Margin Rewards of Reshoring and Data Center Capex].
Power and Grid Infrastructure Providers Lock in Decades of Demand
The staggering power requirements of onshored megaprojects are creating a multi-decade backlog for grid infrastructure and thermal management systems.
"Total U.S. data center backlog has grown to 307 gigawatts or 15 years of backlog at 2025 build rates, up from 12 years in our last update..." — Eaton Rides Massive Wave of Data Center and Megaproject Orders in Q2 2026
(via Eaton (ETN) Q2 2026 Earnings Call Transcript)
Eaton's expansion into liquid cooling via Boyd Thermal and its planned divestiture of its automotive division show how legacy industrial giants are aggressively pure-playing the grid-to-chip infrastructure boom [Eaton Rides Massive Wave of Data Center and Megaproject Orders in Q2 2026]. This strategic realignment positions power management as the ultimate gatekeeper of domestic high-tech manufacturing.
What to watch: Whether Eaton's $5.1 billion Mobility merger with Dana closes on schedule in the first quarter of 2027, allowing the company to shed cyclical automotive drag [Eaton Rides Massive Wave of Data Center and Megaproject Orders in Q2 2026].
Advanced Packaging Emerges as the Critical Bottleneck for Semiconductor Reshoring
Domestic semiconductor self-sufficiency is shifting its focus to back-end advanced packaging as chipmakers realize that front-end fabrication cannot function without localized assembly.
"By combining TSMC's leading-edge wafer fabrication capabilities with Amkor's advanced packaging and test expertise, we are helping build a more resilient semiconductor ecosystem in Arizona..." — US Advanced Packaging Ecosystem Emerges as Critical Reshoring Node with TSMC-Amkor Alliance
(via AMKR.OQ - Q2 2026 Amkor Technology Inc Earnings Call Transcript)
Amkor's partnerships with TSMC and NVIDIA prove that the domestic supply chain requires high-volume packaging clusters, not just raw silicon fabs, to achieve true resilience [US Advanced Packaging Ecosystem Emerges as Critical Reshoring Node with TSMC-Amkor Alliance]. However, building out this advanced infrastructure introduces near-term financial friction that will test investor patience.
What to watch: How severely underutilized capacity and high depreciation costs from the Arizona facility drag down Amkor's gross margins starting in 2027 [US Advanced Packaging Ecosystem Emerges as Critical Reshoring Node with TSMC-Amkor Alliance].
What surprised us
- Comfort Systems' astronomical cash generation: Comfort Systems USA pulled in $999 million in free cash flow in a single quarter, driven by "advanced cash" payments from hyperscalers desperate to lock up mechanical and electrical capacity [Specialty Contractors Reap High-Margin Rewards of Reshoring and Data Center Capex
- The scale of the U.S. power backlog: The total U.S. data center backlog has swelled to 307 gigawatts—representing 15 years of construction at current rates and six times the total capacity built over the last several decades [Eaton Rides Massive Wave of Data Center and Megaproject Orders in Q2 2026
- Amkor's near-term margin trade-off: Despite securing a landmark 10-year TSMC deal and a CHIPS Act award, Amkor expects the massive Arizona buildout to act as a direct margin headwind in 2027 and 2028 due to underutilization and high domestic operating costs [US Advanced Packaging Ecosystem Emerges as Critical Reshoring Node with TSMC-Amkor Alliance