Form 144 - Report of proposed sale of securities:
SEC Accession No. 0001959173-25-005083
Filing Date
2025-08-11
Accepted
2025-08-11 14:15:20
Documents
1

Document Format Files

Seq Description Document Type Size
1 primary_doc.html 144  
1 primary_doc.xml 144 3904
  Complete submission text file 0001959173-25-005083.txt   5375
Mailing Address 436 SEVENTH AVENUE PITTSBURGH PA 15219
Business Address 436 SEVENTH AVENUE PITTSBURGH PA 15219 412-227-2001
Koppers Holdings Inc. (Subject) CIK: 0001315257 (see all company filings)

EIN.: 201878963 | State of Incorp.: PA | Fiscal Year End: 1231
Type: 144 | Act: 33 | File No.: 001-32737 | Film No.: 251201442
SIC: 2400 Lumber & Wood Products (No Furniture)
(CF Office: 04 Manufacturing)

Mailing Address 436 SEVENTH AVENUE PITTSBURGH PA 15219
Business Address
Washington Kevin (Reporting) CIK: 0001932214 (see all company filings)

Type: 144