Mayville Engineering Q4 Sales Up 10.7% With Margins Pressured by Launch Costs
Mayville Engineering reported fourth-quarter sales of $134.3 million, up 10.7% year-over-year while organic net sales declined 5.3% excluding the Accu-Fab acquisition. Manufacturing margin fell to 6.6% from 8.9% due to $2.9 million of launch inefficiencies, adjusted EBITDA dropped to 4.7%, and data center volumes are expected to ramp in 2026.
1. Transitional Period and End-Market Trends
Mayville Engineering is navigating a transitional period as muted demand in legacy markets coincides with accelerating data center and critical power activity. Management has reallocated capacity and resources to support new program launches in high-growth sectors.
2. Fourth-Quarter Sales Performance
Fourth-quarter net sales reached $134.3 million, a 10.7% increase year-over-year, while organic net sales excluding the Accu-Fab acquisition declined 5.3%. The acquisition contributed a higher-margin revenue component, partially offsetting softness in core markets.
3. Margin Pressures from Launch and Inefficiencies
Manufacturing margin fell to 6.6% from 8.9%, reflecting $1.2 million in data center launch costs and $1.7 million in early-stage commercial vehicle inefficiencies. Adjusted EBITDA margin dropped to 4.7% from 7.6%, with temporary headwinds totaling $2.9 million.
4. 2026 Outlook and Volume Ramp
Management expects volume ramps in data center and critical power programs later in 2026, anticipating improved efficiency and margin recovery as new projects move beyond initial launch phases.