Employer with a benefit plan ยท SEC filer
KOPPERS INC.
Also filed as KOPPERS INDUSTRIES INC
436 SEVENTH AVENUE STE. 1500, PITTSBURGH, PA 152191826
EIN
25-1588399
Benefit plan 3, 2024 filing
RETIREMENT PLAN FOR KOPPERS INC.
DOL · 2025-10-15
Participants (start of year)
1,193
DOL · 2025-10-15
Plan features
code 1A1B1I
DOL · 2025-10-15
Plan type
Single-employer plan
DOL · 2025-10-15
Business code (NAICS)
321900
DOL · 2025-10-15
Benefit plan 5, 2024 filing
KOPPERS INC. RETIREMENT PLAN
DOL · 2025-10-15
Participants (start of year)
1,144
DOL · 2025-10-15
Plan features
code 1A1B1I
DOL · 2025-10-15
Plan type
Single-employer plan
DOL · 2025-10-15
Business code (NAICS)
321900
DOL · 2025-10-15
Benefit plan 1, 2024 filing
EMPLOYEE SAVINGS PLAN OF KOPPERS INC AND SUBSIDIARIES
DOL · 2025-10-06
Participants (start of year)
1,683
DOL · 2025-10-06
Plan features
code 2E2G2J2K2S2T
DOL · 2025-10-06
Plan type
Single-employer plan
DOL · 2025-10-06