X0304 4 2011-12-30 0 0000701374 Six Flags Entertainment Corp SIX 0001498596 Petit Brett C/O SIX FLAGS ENTERTAINMENT CORPORATION 924 AVENUE J EAST GRAND PRAIRIE TX 75050 0 1 0 0 Senior VP - Marketing Common Stock, par value $0.025 per share 2011-12-30 5 J 0 E 334 34.58 A 39343 D We have been reporting shares acquired pursuant to the Six Flags Entertainment Corporation Employee Stock Purchase Plan ("ESPP") as a separate line item in Table I of Form 4. With future reports, we, in accordance with SEC guidance, intend to include shares acquired pursuant to the ESPP in column 5 "Amount of Securities Beneficially Owned Following Reported Transaction(s)" in the Form 4 or Form 5 otherwise filed after the acquisition of such ESPP shares rather than report such ESPP shares as a separate line item. We also intend to provide a footnote to column 5 to set forth the number of shares acquired pursuant to the ESPP since the last-filed Form 4 or Form 5. /s/ Brett Petit 2012-01-10