EDGAR Filing Documents for 0001144204-18-007815

Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]

SEC Accession No. 0001144204-18-007815

Filing Date

2018-02-13

Accepted

2018-02-13 14:20:51

Documents

Document Format Files

Seq	Description	Document	Type	Size
1	SC 13G/A	tv485428_sc13ga.htm	SC 13G/A	53290
	Complete submission text file	0001144204-18-007815.txt		55020

Mailing Address 924 AVENUE J EAST GRAND PRAIRIE TX 75050

Business Address 924 AVENUE J EAST GRAND PRAIRIE TX 75050 972 595-5000

Six Flags Entertainment Corp (Subject) CIK: 0000701374 (see all company filings)

IRS No.: 133995059 | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-33593 | Film No.: 18602210
SIC: 7990 Services-Miscellaneous Amusement & Recreation

Mailing Address 150 NORTH RIVERSIDE PLAZA CHICAGO IL 60606

Business Address 150 NORTH RIVERSIDE PLAZA CHICAGO IL 60606 312-236-1600

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (Filed by) CIK: 0001644956 (see all company filings)

IRS No.: 472614791 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A