X0306 4 2013-08-19 0 0000077543 TUTOR PERINI Corp TPC 0000906134 TUTOR RONALD N C/0 TUTOR PERINI CORPORATION 15901 OLDEN STREET SYLMAR CA 91342 1 1 1 0 Chairman & CEO Common Stock 2013-08-19 4 S 0 25557 18.95 D 8247563 I By Ronald N. Tutor Separate Property Trust Common Stock 2013-08-20 4 S 0 70254 19.07 D 8177309 I By Ronald N. Tutor Separate Property Trust Common Stock 2013-08-21 4 S 0 4189 18.85 D 8173120 I By Ronald N. Tutor Separate Property Trust Common Stock 383255 I By Ronald N. Tutor 2009 Dynasty Trust The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.85 to $19.18, inclusive. The reporting person undertakes to provide to Tutor Perini Corporation, any security holder of Tutor Perini Corporation, 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 ranges set forth in this footnote of this Form 4. The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.61 to $19.33, inclusive. The reporting person undertakes to provide to Tutor Perini Corporation, any security holder of Tutor Perini Corporation, 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 ranges set forth in this footnote of this Form 4. The prices reported on Column 4 are weighted average prices. These shares were sold in multiple transactions at prices ranging from $18.72 to $18.98, inclusive. The reporting person undertakes to provide to Tutor Perini Corporation, any security holder of Tutor Perini Corporation, 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 ranges set forth in this footnote of this Form 4. /s/William B. Sparks, attorney in fact 2013-08-21