Form 4/A - Statement of changes in beneficial ownership of securities: [Amend]
SEC Accession No. 0000950170-25-037432
Filing Date
2025-03-11
Accepted
2025-03-11 18:39:35
Documents
1
Period of Report
2023-05-04

Document Format Files

Seq Description Document Type Size
1 4/A ownership.html 4/A  
1 4/A ownership.xml 4/A 11564
  Complete submission text file 0000950170-25-037432.txt   12957
Mailing Address
Business Address
WILKERSON SONJA MICHELLE (Reporting) CIK: 0001245155 (see all company filings)

Type: 4/A | Act: 34 | File No.: 001-32737 | Film No.: 25729353

Mailing Address 436 SEVENTH AVENUE PITTSBURGH PA 15219
Business Address 436 SEVENTH AVENUE PITTSBURGH PA 15219 412-227-2001
Koppers Holdings Inc. (Issuer) CIK: 0001315257 (see all company filings)

EIN.: 201878963 | State of Incorp.: PA | Fiscal Year End: 1231
SIC: 2400 Lumber & Wood Products (No Furniture)
(CF Office: 04 Manufacturing)