MasTec is trading 11.15% down at $176.72 after pipeline project delays prompted lower 2026 profitability guidance. - Management cited permitting-related delays averaging about 60 days, reducing crew and equipment utilization and pushing some work into 2027. - Adjusted EBITDA outlook was lowered to $1.565–$1.600 billion. - The sector and major indexes are higher, so broad-market weakness does not explain the decline.