Mayville Engineering Bets on Data Center Ramp

Mayville Engineering Company ((MEC)) has held its Q4 earnings call. Read on for the main highlights of the call.

Mayville Engineering’s latest earnings call painted a cautiously optimistic picture, with management leaning on powerful tailwinds from data center and critical power demand to offset near‑term margin and leverage pressure. Executives framed current profitability headwinds as temporary launch costs tied to rapid program ramps, while emphasizing sizable growth opportunities and a clear path to higher EBITDA and cash generation in 2026.

Solid Q4 Revenue Lift, Helped by AccuFab

Q4 net sales rose 10.7% year over year to $134.3 million, driven largely by the AccuFab acquisition’s contribution. While this headline growth signals momentum, investors should note that the underlying base business was softer, highlighting the importance of new end‑market exposure and integration synergies.

Data Center and Critical Power Drive the Growth Story

Sales to data center and critical power customers increased about 13% in Q4, underscoring this segment as Mayville’s main growth engine. Management highlighted a qualified pipeline exceeding $125 million and emphasized that these projects are still in the early innings of a multi‑year build‑out cycle.

AccuFab Integration Unlocks High‑Margin Cross‑Selling

The AccuFab acquisition added higher‑margin revenue in Q4 and is central to the company’s long‑term strategy. Management expects AccuFab‑related cross‑selling to generate an additional $40 million to $50 million of revenue in 2026, signaling meaningful upside if execution stays on track.

Large Data Center Market Opportunity Ahead

Mayville estimates its U.S. serviceable addressable market at roughly $115 million to $185 million per gigawatt of new data center capacity. Based on current capacity plans, the company pegs its 2026 market opportunity at about $3.2 billion and sees the data center space compounding at roughly 16% annually from 2026 through 2030.

Healthy Bookings and New Awards Support 2026 Visibility

In Q4 the company secured approximately $15 million in new project awards from data center and critical power customers, bolstering future revenue streams. Across legacy markets, year‑to‑date awards topped $108 million, exceeding management’s $100 million goal and feeding an expected $140 million of bookings in 2026.

Detailed 2026 Financial Targets Signal Confidence

For full‑year 2026, management guided to net sales of $580 million to $620 million and adjusted EBITDA of $50 million to $60 million. Free cash flow is projected at $25 million to $35 million, with assumptions including a full year of AccuFab contributions and $40 million to $50 million of cross‑selling revenue.

Quarterly Guidance Adds Near‑Term Transparency

To better navigate fast‑moving data center demand, Mayville introduced quarterly guidance beginning with Q1 2026. The company expects Q1 sales between $137 million and $143 million and adjusted EBITDA of $5 million to $7 million, offering investors more granular visibility into the ramp.

Free Cash Flow Stabilizes, Conversion Remains a Focus

Q4 free cash flow was $10.2 million and, excluding a sizable settlement in the prior year, was roughly flat year over year. Management reiterated a target of converting about 50% to 60% of adjusted EBITDA into free cash flow on a full‑year basis, a key metric for debt reduction and shareholder value.

Operational Programs Aim to Restore Margins

The company reported progress on its MBX operational excellence program and expects $2 million to $3 million of cost savings from NBX and strategic pricing in 2026. These initiatives are already embedded in guidance and are designed to offset inflation while lifting margins back toward historical levels.

Share Gains Across Construction, Powersports and Trucks

Commercial momentum extended beyond data centers, with construction and access revenues up roughly 15% year over year, including about 11% organic growth. Powersports sales climbed around 20%, and Mayville cited continued market share gains with commercial vehicle customers for programs launching into 2026 and 2027.

Organic Sales Slip as Legacy Demand Softens

Stripping out AccuFab, organic net sales declined approximately 5.3% in Q4, underscoring weakness in legacy markets. This softness is a key offset to strength in newer segments and helps explain why headline growth is not yet fully translating into stronger profits.

Temporary Launch Costs Squeeze Manufacturing Margins

Manufacturing margin fell to 6.6% in Q4 from 8.9% a year earlier, pressured by about $1.2 million of launch costs and $1.7 million of early‑stage inefficiencies. Management noted that absent these temporary dynamics, the manufacturing margin would have been around 9%, suggesting underlying operations remain sound.

Adjusted EBITDA Margin Hit by Ramp Inefficiencies

Adjusted EBITDA margin declined to 4.7% in Q4 from 7.6% in the prior year, reflecting lower volumes in legacy markets and roughly $2.9 million of launch‑related costs and early inefficiencies. Management indicated that excluding these impacts, adjusted EBITDA margin would have been closer to 7%, reinforcing their view that the margin drag is transitory.

Leverage Climbs Following Acquisition‑Fueled Growth

Net debt increased to $205.3 million at quarter‑end, up sharply from $82.1 million a year earlier due to the AccuFab purchase. This pushed net leverage to 3.7 times, above the company’s 2.5 times long‑term target, though management aims to bring it down to 3.0 times or lower by the end of 2026.

Rising Interest Costs Weigh on Earnings

Higher borrowings also flowed through the income statement via rising interest expense, which climbed to $3.8 million in Q4 from $2.0 million a year earlier. This higher financing burden makes the company’s plan for improved free cash flow and deleveraging particularly important for equity holders.

Near‑Term Margin and Cash Flow Pressure to Persist

Management cautioned that project launch costs and margin pressure will likely continue into Q1 and the first half of 2026 as new programs ramp. Free cash flow is expected to be softer in Q1 given typical seasonal working capital needs and additional inventory and tooling required to support the growth pipeline.

Legacy Commercial Vehicle Market Remains a Drag

The commercial vehicle segment remained under pressure, with net sales down about 19% versus the prior‑year quarter. This weakness is a key driver of the organic sales decline and illustrates why diversification into faster‑growing sectors like data centers is strategically important.

Rapid Ramps Create Operational Strain Across Plants

Aggressive launch timelines of just six to twelve weeks and retooling at six legacy plants created early‑stage inefficiencies. These dynamics, combined with about $1.1 million of incremental SG&A tied to AccuFab and roughly $0.2 million of one‑time costs, added to the margin squeeze but are expected to fade as programs stabilize.

Guidance Highlights Growth, Margin Recovery and Deleveraging

Looking ahead to 2026, Mayville forecast Q1 sales of $137 million to $143 million and adjusted EBITDA of $5 million to $7 million, alongside capex of $3 million to $5 million and softer near‑term free cash flow. For the full year, the company expects $580 million to $620 million in sales, $50 million to $60 million in adjusted EBITDA, $25 million to $35 million of free cash flow, and $15 million to $20 million in capex, with data center cross‑selling and $2 million to $3 million of cost improvements supporting margin recovery and lower leverage.

The earnings call positioned Mayville Engineering as a company in transition, trading near‑term margin volatility and higher leverage for a bigger foothold in structurally growing data center and critical power markets. For investors, the story now hinges on execution: if management can deliver on its operational improvements, cross‑selling targets and deleveraging plans, the current headwinds may set up a more profitable and resilient business by 2026 and beyond.