Defined Benefit (Pension) · DOL Form 5500 · 2024

Koppers Inc. Pension Plan

Data updated 2026-08-25

$5M
Total assets Small plan by assets
224
Participants Below avg headcount
42nd
Percentile by assets National rank
$22,214
Avg per participant Low balance/head
PlainRetire home → About this data RSS: change history

Official DOL plan name: Retirement Plan for Koppers Inc. · Sponsored by Koppers Inc. · Pennsylvania · Manufacturing

$5M in assets, 224 participants

Koppers Inc.'s Retirement Plan for Koppers Inc. reported $5M in total assets and 224 participants in its 2024 DOL Form 5500 filing, ranking in the 42nd percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #4,438 in Manufacturing (17,777 peers)

Coverage in Pennsylvania

Retirement Plan for Koppers Inc. covers 224 participants in Pennsylvania, about 27% of the average Pennsylvania filer (state average ~822 per filing). Assets: $5M.

#4,438
in Manufacturing (17,777 peers)
-94.9%
assets change YoY

Retirement Plan for Koppers Inc.'s mid-pack asset rank among Manufacturing and all filers

Retirement Plan for Koppers Inc. vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$4,975,838 42nd percentile higher than 42% of 123,620 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Retirement Plan for Koppers Inc. among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Retirement Plan for Koppers Inc. sits mid-pack in the medium band (224 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Retirement Plan for Koppers Inc. end-of-year assets fell from $98M in the plan year 2023 filing to $5M in the plan year 2024 filing.
  • Retirement Plan for Koppers Inc. reported net income fell from $5M in the plan year 2023 filing to $875K in the plan year 2024 filing.
  • Retirement Plan for Koppers Inc. reported participants fell from 246 in the plan year 2023 filing to 224 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Plan-year Form 5500 strip

Filing strip 251588399 · Koppers Inc. PY 2024 · Defined Benefit (Pension)

Retirement Plan for Koppers Inc. · $5M · 224 · 42nd

  • PART $5M
  • TYPE 224
  • NET 42nd
  • BOOK Defined Benefit (Pension)
  • VS-ST near Tropper Ink, Inc. Defined Benefit Plan
  • BOY ind #4438

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Manufacturing retirement plans → · Plans in Pennsylvania →

Retirement Plan for Koppers Inc. in the asset neighbourhood

Elementis Chemicals Inc. Employees' Retirement PlanElementis Chemicals Inc. Emp…$5MRetirement Plan for Koppers Inc.Retirement Plan for Koppers …$5MTropper Ink, Inc. Defined Benefit PlanTropper Ink, Inc. Defined Be…$5MVoorhees College Pension Plan$5MLiberty Steel Industries, Inc. Defined Benefit PlanLiberty Steel Industries, In…$5M
End-of-year total assets ($M) among Retirement Plan for Koppers Inc. and nearest nationwide Defined Benefit (Pension) peers. Source: DOL Form 5500 plan year 2024.

Pennsylvania filing particulars

Total Assets (Beginning of Year)$98M
Net Assets (End of Year)$5M
Net Income$875K
Employer EIN251588399
Plan Effective Date1989-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Koppers Inc.)

Sponsor-wide plan assets over time

All Koppers Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$352M 25.33729413155118% vs 2022
2024 filing year
$250M$300M$350M$400M 202220232024 $281M $352M ▲ +25.3%
Year Plans Participants Total Assets
2022 3 1,773 $281M
2023 3 1,900 $315M
2024 4 2,099 $352M

Nearby Defined Benefit (Pension) Plans in Pennsylvania

Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.

Retirement Plan for Koppers Inc. vs. nearby Defined Benefit (Pension) plans in Pennsylvania, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -5051015 Total assets ($B) Participants Retirement Plan for Koppers Inc., Total assets ($B): 0.004975838 · Participants: 224Retirement Plan for Koppers Inc.National Elevator Industry Pension Plan, Total assets ($B): 12.213235301 · Participants: 28308National Elevator Industry Pension PlanSteelworkers Pension Trust, Total assets ($B): 7.234971663 · Participants: 46110Steelworkers Pension TrustThe PNC Financial Services Group, Inc. Pension Plan, Total assets ($B): 5.528998 · Participants: 58779The PNC Financial Services Group, Inc. Pension PlanThe Bank of New York Mellon Corporation Pension Plan, Total assets ($B): 5.178651926 · Participants: 6387The Bank of New York Mellon Corporation Pension PlanConstellation Retirement Program, Total assets ($B): 5.003720253 · Participants: 4809Constellation Retirement Program
Retirement Plan for Koppers Inc. vs. nearby Defined Benefit (Pension) plans in Pennsylvania, assets vs. participants
Compare Retirement Plan for Koppers Inc. side-by-side with 3 peers →

Retirement Plan for Koppers Inc.'s out-of-state Defined Benefit (Pension) peers by assets and headcount

Outside Pennsylvania, the nearest Defined Benefit (Pension) by assets is Tropper Ink, Inc. Defined Benefit Plan in CT ($5M); by covered participants it is Non-Contributory Retirement Program for Certain Empl of Bcbs Wyoming in WY (224 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (224 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Retirement Plan for Koppers Inc. assets move in 2024? ▼
Retirement Plan for Koppers Inc. contracted severely - down 94.9% during 2024, from $98M to $5M. Reported net income was $875K.
How have Koppers Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Koppers Inc.'s sponsor-wide assets grew 25.3%, from $281M to $352M.
Which Defined Benefit (Pension) plans are similar in size to Retirement Plan for Koppers Inc.? ▼
Among Defined Benefit (Pension) plans in other states, the closest by assets is Tropper Ink, Inc. Defined Benefit Plan in CT ($5M, 3 participants).
Which Defined Benefit (Pension) plans cover a similar participant headcount to Retirement Plan for Koppers Inc.? ▼
Among Defined Benefit (Pension) plans in other states, the closest by covered participants is Non-Contributory Retirement Program for Certain Empl of Bcbs Wyoming in WY (224 participants, $36M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 251588399.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.