EntityWire/Pennsylvania business entity search →/KOPPERS INC.
Employer with a benefit plan
KOPPERS INC.
The Employer Identification Number (EIN) for KOPPERS INC. is 25-1588399.
At a glance
- EIN
- 25-1588399 · 251588399
- Legal name
- KOPPERS INC.
- Also filed as
- KOPPERS INDUSTRIES INC
- Address on file
- 436 SEVENTH AVENUE STE. 1500, PITTSBURGH, PA 152191826
- Records show
- SEC filer; employer with a benefit plan; state registration
- Latest record
- 2026-09-05
State registration
Florida Division of Corporations (Sunbiz) bulk data · Texas Comptroller active franchise taxpayers file · records as of 2026-09-05
- Texas registration
- Active · Foreign profit corporation
- Source: Texas Comptroller · as of 2026-09-05
- Texas document number
- 0007847206
- Source: Texas Comptroller · as of 2026-09-05
- Florida registration
- Active · Foreign profit corporation
- Source: Florida registry · as of 2026-07-10
- Florida document number
- P22222
- Source: Florida registry · as of 2026-07-10
- Registered in Florida
- 1988-12-21
- Source: Florida registry · as of 2026-07-10
- Registered agent
- CORPORATION SERVICE COMPANY
- Source: Florida registry · as of 2026-07-10
- Last registry activity
- 2003-05-27
- Source: Florida registry · as of 2026-07-10
Benefit plans
DOL Form 5500 filings (EFAST2) · records as of 2025-10-15
- Benefit plan 3, 2024 filing
- RETIREMENT PLAN FOR KOPPERS INC.
- Source: DOL 5500 · as of 2025-10-15
- Participants (start of year)
- 1,193
- Source: DOL 5500 · as of 2025-10-15
- Plan features
- Defined benefit (cash balance); Defined benefit (cash balance, other); Defined benefit (frozen)
- Source: DOL 5500 · as of 2025-10-15
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2025-10-15
- Business code (NAICS)
- 321900
- Source: DOL 5500 · as of 2025-10-15
- Benefit plan 5, 2024 filing
- KOPPERS INC. RETIREMENT PLAN
- Source: DOL 5500 · as of 2025-10-15
- Participants (start of year)
- 1,144
- Source: DOL 5500 · as of 2025-10-15
What this record is
Public filings that carry this EIN (DOL Form 5500 filings (EFAST2), Florida Division of Corporations (Sunbiz) bulk data, SEC EDGAR company filings and Texas Comptroller active franchise taxpayers file), shown as filed. Nothing is scraped from the IRS, and a public-record match is not IRS TIN validation.
What it is not
Registry status, formation date, and registered agent come from the Pennsylvania Department of State, Bureau of Corporations and Charitable Organizations; see the Pennsylvania business entity search.
If something is wrong
A name, address, or classification here is what the source published. To correct the source, file with it; to have this page removed, see corrections and removal.
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- RIVIANA FOODS INC.EIN 76-0177572
- HITACHI RAIL STS USA, INC.EIN 25-1579001
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