SEC Seal
SEC Banner
Search the Next-Generation EDGAR System
Filing Detail
Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0001104659-21-020590
Filing Date
2021-02-11
Accepted
2021-02-11 15:02:28
Documents
1

Document Format Files

Seq Description Document Type Size
1 SC 13G/A tm216055-9_sc13ga.htm SC 13G/A 53601
  Complete submission text file 0001104659-21-020590.txt   55058
Mailing Address 160 EXETER DRIVE WINCHESTER VA 22603-8605
Business Address 160 EXETER DRIVE WINCHESTER VA 22603-8605 5405426300
TREX CO INC (Subject) CIK: 0001069878 (see all company filings)

IRS No.: 541910453 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-56187 | Film No.: 21618982
SIC: 2400 Lumber & Wood Products (No Furniture)

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