Why Is MASTEC INC (MTZ) Stock Down Today?

Why MTZ stock is down today

MasTec Inc. (MTZ) fell 19.67% to $260.62 in the latest session, marking one of the largest declines in its recent history. The drop came after the company cut its 2026 revenue and earnings guidance despite reporting a record quarter. The stock opened with a 15.2% gap down from the prior close and traded lower for most of the session. The move reflects investor concern over the revised outlook and the broader market sentiment for industrials.

What Happened

MasTec reported strong second-quarter results, including a 23% year-over-year revenue increase and a record $21.4 billion backlog. The company also updated its full-year guidance upward following the acquisition of Superior Group. However, the stock plummeted after the firm cut its 2026 guidance, which overshadowed the otherwise positive financial performance. An SEC 8-K filing on July 30 disclosed the results and operations update, as well as a change in board composition. The stock also missed non-GAAP EPS estimates by $0.01, despite beating revenue expectations by $70 million.

What The Data Shows

The stock opened at $275.00 and fell to a session low of $260.12 before finishing at $260.71. The session saw 1.4 million shares traded, which is 1.3 times the 3-month average daily volume. The move comes after a recent insider sale of $2.4 million by Director Ernst Csiszar on June 3. Meanwhile, former President Donald J. Trump disclosed a purchase of $100,001 to $250,000 in MTZ in February. The stock has traded between $160.08 and $441.43 over the past 52 weeks.

What To Watch

MasTec has not scheduled a specific earnings date for the next quarter, but investors will be closely watching the company's ability to meet its revised guidance. The stock's performance may also be influenced by broader industrials trends and any further insider activity.