X0306 4 2021-01-07 0 0000015615 MASTEC INC MTZ 0001293639 Pita George 800 S DOUGLAS ROAD, 12TH FLOOR CORAL GABLES FL 33134 0 1 0 0 CFO Common Stock 2021-01-07 4 S 0 28409 80.033 D 175294 D Common Stock 2021-01-07 4 S 0 1213 80.6016 D 174081 D Common Stock 2021-01-07 4 S 0 405 81.5026 D 173676 D Common Stock 1309 I By 401(k) Plan The 30,027 shares reported as sold in this filing fully complete a 10b5-1 plan created in November 2020. No other 10b5-1 plans are currently in effect for Mr. Pita. Shares sold under this completed plan represented only 15% of the shares owned by Mr. Pita. The price reported in Column 4 is a weighted average price. These shares were sold in 115 separate transactions with prices ranging from $79.385 to $80.335 for an average weighted sales price of $80.033. The reporting person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in 11 separate transactions with prices ranging from $80.385 to $81.350 for an average weighted sales price of $80.6016. The reporting person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in 3 separate transactions with prices ranging from $81.400 to $81.580 for an average weighted sales price of $81.5026. The reporting person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. \s\ Albert de Cardenas For: George Pita 2021-01-08