Mayville Engineering Company, Inc. (MEC) | The Buildout — AI Infrastructure

The Verdict

MEC is a U.S. metal fabricator: it buys sheet metal and tube and turns them into engineered components and assemblies for OEM customers. Its link to the AI buildout runs through the Data Center & Critical Power end market, where it fabricates metal for power distribution units, switchgear, and static transfer switches — the equipment that sits between incoming utility power and the racks. It does not make compute, networking, or software, and management consistently says "data center and critical power" rather than AI. The role is that of a Tier I fabrication supplier: the buildout raises demand for power gear, and the power-gear OEMs buy the metal work from companies like MEC.

Earnings Beat

MEC reported Q2 2026 net sales of $163 million, up 23.2% from the prior-year quarter, with organic net sales up 9.2% excluding Accu-Fab. Manufacturing margin was 10.9%, up from 10.3% a year earlier. The standout was Data Center & Critical Power, where organic growth ran ~173% year over year. The quarter still produced a GAAP net loss of $2.1 million, or ($0.09) per diluted share.

Management tone: Tone shifted from caution to early-recovery language on demand, with more specific detail on capacity and capital and more candor on cost. Q1 2026's "We have not yet seen clear indications of a broad-based or material recovery" became Q2's "the early recovery underway in our commercial vehicle market." Management named the three variables that set the low and high end of guidance — the pace of Commercial Vehicle recovery, the timing and execution of DCP volume, and how quickly launch and outsourcing costs come down — and said plainly that no customer has signed a capacity-reservation contract. The transcript read is that management was predominantly direct; it reframed a question on bespoke versus recurring revenue rather than answering it.

Management Guidance

For Q3 2026, management guides net sales of $160M–$170M and adjusted EBITDA of $15.5M–$18.5M, with $1M–$1.5M of launch-related costs and $1M–$1.5M of outsourcing costs embedded; the stated drivers are continued recovery in Commercial Vehicle and Construction & Access plus the ongoing DCP ramp. For the full year, guidance is net sales of $620M–$650M, adjusted EBITDA of $52M–$60M, and free cash flow of $7M–$15M, with $5M–$6M of launch-related costs and $2M–$3M of outsourcing costs. Management says the full year assumes a full year of Accu-Fab ownership, $50M–$60M of incremental cross-selling revenue, and improvement in legacy demand, and that about $25M of the two-year capacity program falls in 2026.

Trajectory

Revenue is accelerating off a soft base: total sales went from $144.8M in Q1 2026 to $163.0M in Q2, up 23.2% year over year, with organic growth of 9.2% excluding Accu-Fab. The composition is rotating — DCP organic growth ran ~173% year over year in Q2, Commercial Vehicle turned from −24% to +~3%, Construction & Access rose ~15%, and Powersports fell ~6% on offshoring — while the code-computed signals still read gross, operating, and EBITDA margins as compressing on a trailing basis. Cash is the weak spot: free cash flow was a use of $6.9M in Q1 and $6.6M in Q2, and the trailing twelve months show a use of $4.4M.

The Model

The model's locked projections are FY+1 revenue of $645M and EBITDA of $52M (8.1% margin), and FY+2 revenue of $730.0M and EBITDA of $75M (10.3% margin). The near-term figure is anchored on the DCP programs scheduled to launch in 2026, incremental cross-selling revenue, a full year of Accu-Fab ownership, and the early recovery management describes in Commercial Vehicle and Construction & Access. The FY+2 step-up depends on the DCP mix moving toward the 25%–30% long-run target and on the capacity program landing — ~$50M over two years plus a possible $25M–$30M southeastern facility that management says would support ~$50M–$60M of incremental revenue.

Projections are the median of 5 independent model runs. The model’s revenue sits 8.9% above analyst consensus.

For Q3 2026, management guides net sales of $160M–$170M and adjusted EBITDA of $15.5M–$18.5M, with $1M–$1.5M of launch-related costs and $1M–$1.5M of outsourcing costs embedded; the stated drivers are continued recovery in Commercial Vehicle and Construction & Access plus the ongoing DCP ramp. For the full year, guidance is net sales of $620M–$650M, adjusted EBITDA of $52M–$60M, and free cash flow of $7M–$15M, with $5M–$6M of launch-related costs and $2M–$3M of outsourcing costs. Management says the full year assumes a full year of Accu-Fab ownership, $50M–$60M of incremental cross-selling revenue, and improvement in legacy demand, and that about $25M of the two-year capacity program falls in 2026.

What Could Go Right — and Wrong

Looking Ahead

The next twelve months turn on three things: whether launch and outsourcing costs roll off in early 2027, whether the capacity program converts into shipped revenue, and whether the legacy recovery holds. Management is targeting a decision on the southeastern U.S. facility in late 2026, expects Commercial Vehicle 2027 EPA-related programs to begin entering production in late 2026 with revenue "potentially showing up in late Q4" and ramping in 2027, and expects the ~$40M of DCP awards secured in Q2 2026 to begin producing revenue during 2027. It has also said it will share more clarity on when the existing footprint's roughly $850M revenue ceiling is reached at end-2026 or early 2027.

Financials

Annual Summary

Key Ratios (Trailing)

The Company

MEC is a U.S.-based, vertically integrated metal fabricator — founded in 1945 and headquartered in Milwaukee, Wisconsin — that describes itself as "a leading Tier I U.S. supplier of highly engineered components to OEM customers with leading positions in their respective markets." It reports one operating segment making metal components for heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, data center & critical power, agriculture, military, and other products. The AI-infrastructure link is the Data Center & Critical Power end market, roughly 20% of 2026 revenue, where the awarded scopes are power distribution units, switchgear, and static transfer switches. Legacy cyclical markets still make up the large majority of revenue; DCP is the growth engine and the capital-allocation priority, with a 25%–30% long-run mix target framed by management as a three- to five-year cycle.

MEC runs its own plants rather than assembling through a contractor network. The 10-K carries a 27-line real-estate table of manufacturing sites plus the Milwaukee headquarters (17,000 sq ft, leased). Selected owned sites include Mayville, WI (340,000 sq ft), Beaver Dam, WI (303,000), Fond du Lac, WI (299,000), and Defiance, OH (250,000); Hazel Park, MI is leased at 263,000 sq ft and is the most granular data-center site, with roughly $55M of data center products placed into it in the first two quarters of 2026 against about $100M of total plant capacity. Wautoma, WI (157,000 sq ft) is held for sale. The processes MEC names are laser cutting, brake press, and painting/powder coating, and the company has converted roughly six plants, potentially a seventh, to data center manufacturing. It says 100% of its steel is procured domestically and that 30%–40% of its aluminum is imported from Canada.

Business Segments

Competitive Landscape

MEC is one of a set of North American contract fabricators. Its own description is of a Tier I supplier to OEMs, and the CEO has repeatedly positioned it as the largest fabricator in North America; the company was named Number One Fabricator for the sixteenth consecutive year in June 2026. The source's criticality read is that if MEC disappeared the AI buildout would barely slow, because multiple alternative fabricators exist and re-qualification would take a few months at most. The individual processes are ordinary metal fabrication — MEC itself is buying laser, brake press, and paint capacity from third parties during the ramp, which shows the work can be done elsewhere — and the company's stated competitive claim is scale, footprint breadth, program management, and domestic supply reliability rather than proprietary technology. The CEO's structural argument is that paint and powder-coat capacity is scarce, calling it "a dearth of paint capacity, paint and powder coat capacity in the country."

Supply Chain

MEC sits one step upstream of the data center power equipment makers: it buys steel and aluminum, fabricates the metal, and sells components and assemblies to OEMs. None of the large neighbors in the supply-chain read-through named MEC directly.