Mayville Engineering Company has delivered significant outperformance, rising 90.8% since its original ‘strong buy' rating, but is now downgraded to ‘buy.'. MEC's Q1 2026 revenue grew 6.8% to $144.8 million, driven by data centers, critical power markets, and the Accu-Fab acquisition. Despite revenue growth, MEC's profitability declined due to one-off impairment charges and higher interest expense from increased net debt.