Defined Benefit (Pension) · DOL Form 5500 · 2023

Koppers Inc. Pension Plan

Data updated 2026-08-25

$98M
Total assets Below avg plan size
246
Participants Below avg headcount
91st
Percentile by assets National rank
$398,394
Avg per participant High balance/head
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Official DOL plan name: Retirement Plan for Koppers Inc. · Sponsored by Koppers Inc. · Pennsylvania · Manufacturing

$98M in assets, 246 participants

Koppers Inc.'s Retirement Plan for Koppers Inc. reported $98M in total assets and 246 participants in its 2023 DOL Form 5500 filing, ranking in the 91st 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.

  • #16,219 in Manufacturing (18,722 peers)

Coverage in Pennsylvania

Retirement Plan for Koppers Inc. covers 246 participants in Pennsylvania, about 30% of the average Pennsylvania filer (state average ~822 per filing). Assets: $98M.

#16,219
in Manufacturing (18,722 peers)
+5.0%
assets growth YoY
1.0×
vs typical plan assets (national mean)

Retirement Plan for Koppers Inc.'s outsized position by total assets

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

End-of-year total assets · plan year 2023 · DOL Form 5500

$98,004,897 Top 9% higher than 91% of 127,068 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 2023

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

Plan-year 2023 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 (246 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Retirement Plan for Koppers Inc. reported net income rose from -$39M in the plan year 2022 filing to $5M in the plan year 2023 filing.
  • Retirement Plan for Koppers Inc. reported participants fell from 281 in the plan year 2022 filing to 246 in the plan year 2023 filing.
  • Retirement Plan for Koppers Inc. end-of-year assets rose from $93M in the plan year 2022 filing to $98M in the plan year 2023 filing.

See the national 2022→2023 release diff →

Published 5500 schedule card

Filing strip 251588399 · Koppers Inc. PY 2023 · Defined Benefit (Pension)

Retirement Plan for Koppers Inc. · $98M · 246 · 91st

  • VS-ST $98M
  • BOY 246
  • SCH 91st
  • EBSA Defined Benefit (Pension)
  • PART near Itw Bargaining Retirement Plan
  • TYPE ind #16219

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

Local 734 Pension Fund$98MRetirement Plan for Koppers Inc.Retirement Plan for Koppers …$98MItw Bargaining Retirement PlanItw Bargaining Retirement Pl…$98MMdu Resources Group, Inc. Pension Plan for Non-Bargaining Unit EmployeesMdu Resources Group, Inc. Pe…$98MSound Variable Annuity Pension TrustSound Variable Annuity Pensi…$98M
End-of-year total assets ($M) among Retirement Plan for Koppers Inc. and nearest nationwide Defined Benefit (Pension) peers. Source: DOL Form 5500 plan year 2023.

Pennsylvania filing particulars

Total Assets (Beginning of Year)$93M
Net Assets (End of Year)$98M
Net Income$5M
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): 0.098004897 · Participants: 246Retirement Plan for Koppers Inc.National Elevator Industry Pension Plan, Total assets ($B): 11.224377797 · Participants: 27434National Elevator Industry Pension PlanSteelworkers Pension Trust, Total assets ($B): 6.602912146 · Participants: 47052Steelworkers Pension TrustThe PNC Financial Services Group, Inc. Pension Plan, Total assets ($B): 5.63715 · Participants: 63680The PNC Financial Services Group, Inc. Pension PlanConstellation Retirement Program, Total assets ($B): 5.323012123 · Participants: 5080Constellation Retirement ProgramThe Bank of New York Mellon Corporation Pension Plan, Total assets ($B): 5.257223708 · Participants: 7374The Bank of New York Mellon Corporation Pension Plan
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 Itw Bargaining Retirement Plan in IL ($98M); by covered participants it is Vinson & Elkins LLP Pension Plan in TX (246 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($98M here).

Similar participant headcount

Nearest other-state filings by covered participants (246 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. 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 2023? ▼
Retirement Plan for Koppers Inc. grew at a solid clip - up 5.0% during 2023, from $93M to $98M. Reported net income was $5M.
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.
Where does Retirement Plan for Koppers Inc. rank by assets among Form 5500 filers? ▼
Retirement Plan for Koppers Inc. ranks in the 91st percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 10% of all filed plans by assets).
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 Itw Bargaining Retirement Plan in IL ($98M, 113 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 Vinson & Elkins LLP Pension Plan in TX (246 participants, $125M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

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.