X0306 4 2012-12-26 0 0000701374 Six Flags Entertainment Corp SIX 0001111849 BALK LANCE C C/O SIX FLAGS ENTERTAINMENT CORPORATION 924 AVENUE J EAST GRAND PRAIRIE TX 75050 0 1 0 0 Executive Vice President, GC Common Stock, par value $0.025 per share 2012-12-26 4 S 0 3974 58.656 D 146558 D Common Stock, par value $0.025 per share 2012-12-26 4 S 0 10078 59.785 D 136480 D Common Stock, par value $0.025 per share 2012-12-26 4 S 0 6499 60.453 D 129981 D Common Stock, par value $0.025 per share 2012-12-26 4 S 0 101 61.401 D 129880 D The transactions reported on this Form 4 was effected consistent with transaction directions under a Rule 10b5-1 trading plan adopted by Lance Balk with respect to the issuance of shares upon the vesting of Project 350 RSUs. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $58.12 to $59.08, inclusive. The reporting person undertakes to provide Issuer, any security holder of 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 ranges set forth in this footnote. Includes certain restricted stock units subject to vesting. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $59.19 to $60.17, inclusive. The reporting person undertakes to provide Issuer, any security holder of 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 ranges set forth in this footnote. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $60.21 to $60.71, inclusive. The reporting person undertakes to provide Issuer, any security holder of 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 ranges set forth in this footnote. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $61.40 to $61.49, inclusive. The reporting person undertakes to provide Issuer, any security holder of 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 ranges set forth in this footnote. /s/ Lance C. Balk 2012-12-28