401(k) · DOL Form 5500 · 2023

Koppers Inc. 401(k) Plan

Data updated 2026-08-25

$34M
Total assets Below avg plan size
463
Participants Below avg headcount
81st
Percentile by assets National rank
$74,288
Avg per participant Below avg balance/head
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Official DOL plan name: Koppers Inc. Savings Plan for Union Hourly Employees · Sponsored by Koppers Inc. · Pennsylvania · Manufacturing

$34M in assets, 463 participants

Koppers Inc.'s Koppers Inc. Savings Plan for Union Hourly Employees reported $34M in total assets and 463 participants in its 2023 DOL Form 5500 filing, ranking in the 81st 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.

  • #13,732 in Manufacturing (18,722 peers)

Where Koppers Inc. Savings Plan for Union Hourly Employees sits by assets

Koppers Inc. Savings Plan for Union Hourly Employees sits in the top quartile of all filed plans by assets, $34M for 463 participants (~$74,288/participant), up 11.2% in 2023.

#13,732
in Manufacturing (18,722 peers)
+11.2%
assets growth YoY
0.3×
vs typical plan assets (national mean)

Koppers Inc. Savings Plan for Union Hourly Employees's outsized position by total assets

Koppers Inc. Savings Plan for Union Hourly Employees vs every filed plan by assets

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

$34,395,129 Top 19% higher than 81% 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

Koppers Inc. Savings Plan for Union Hourly Employees 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. Koppers Inc. Savings Plan for Union Hourly Employees sits mid-pack in the medium band (463 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Koppers Inc. Savings Plan for Union Hourly Employees reported net income rose from -$8M in the plan year 2022 filing to $4M in the plan year 2023 filing.
  • Koppers Inc. Savings Plan for Union Hourly Employees end-of-year assets rose from $31M in the plan year 2022 filing to $34M in the plan year 2023 filing.
  • Koppers Inc. Savings Plan for Union Hourly Employees reported participants fell from 472 in the plan year 2022 filing to 463 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 251588399 · Koppers Inc. PY 2023 · 401(k)

Koppers Inc. Savings Plan for Union Hourly Employees · $34M · 463 · 81st

  • TYPE $34M
  • TYPE 463
  • TYPE 81st
  • TYPE 401(k)
  • TYPE near Innovairre Communications Retirement Income Savings Plan
  • TYPE ind #13732

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 →

Koppers Inc. Savings Plan for Union Hourly Employees in the asset neighbourhood

Koppers Inc. Savings Plan for Union Hourly EmployeesKoppers Inc. Savings Plan fo…$34MAdvanced Ent Retirement Plan$34MFive Guys Enterprises, LLC 401(k) PlanFive Guys Enterprises, LLC 4…$34MInnovairre Communications Retirement Income Savings PlanInnovairre Communications Re…$34MCambridge Mobile Telematics 401(k) PlanCambridge Mobile Telematics …$34M
End-of-year total assets ($M) among Koppers Inc. Savings Plan for Union Hourly Employees and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)$31M
Net Assets (End of Year)$34M
Net Income$4M
Employer EIN251588399
Plan Effective Date1995-11-01
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 401(k) Plans in Pennsylvania

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Koppers Inc. Savings Plan for Union Hourly Employees vs. nearby 401(k) plans in Pennsylvania, assets vs. participants Scatter plot of 6 data points. -50000050000100000 -505101520 Total assets ($B) Participants Koppers Inc. Savings Plan for Union Hourly Employees, Total assets ($B): 0.034395129 · Participants: 463Koppers Inc. Savings Plan for Union Hourly EmployeesComcast Corporation Retirement - Investment Plan, Total assets ($B): 17.368669862 · Participants: 93136Comcast Corporation Retirement - Investment PlanCigna 401(k) Plan, Total assets ($B): 13.003870935 · Participants: 66760Cigna 401(k) PlanThe Vanguard Retirement and Savings Plan, Total assets ($B): 9.765617477 · Participants: 18200The Vanguard Retirement and Savings PlanThe PNC Financial Services Group, Inc. Incentive Savings Plan, Total assets ($B): 9.339762 · Participants: 61697The PNC Financial Services Group, Inc. Incentive Savings PlanThe Bank of New York Mellon Corporation 401(k) Savings Plan, Total assets ($B): 8.955655142 · Participants: 25184The Bank of New York Mellon Corporation 401(k) Savings Plan
Koppers Inc. Savings Plan for Union Hourly Employees vs. nearby 401(k) plans in Pennsylvania, assets vs. participants
Compare Koppers Inc. Savings Plan for Union Hourly Employees side-by-side with 3 peers →

Koppers Inc. Savings Plan for Union Hourly Employees's out-of-state 401(k) peers by assets and headcount

Outside Pennsylvania, the nearest 401(k) by assets is Innovairre Communications Retirement Income Savings Plan in NJ ($34M); by covered participants it is J. a. Riggs Tractor Company Profit Sharing Plan in AR (463 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($34M here).

Similar participant headcount

Nearest other-state filings by covered participants (463 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 Koppers Inc. Savings Plan for Union Hourly Employees assets move in 2023? ▼
Koppers Inc. Savings Plan for Union Hourly Employees grew at a solid clip - up 11.2% during 2023, from $31M to $34M. Reported net income was $4M.
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 Koppers Inc. Savings Plan for Union Hourly Employees rank by assets among Form 5500 filers? ▼
Koppers Inc. Savings Plan for Union Hourly Employees ranks in the 81st percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Koppers Inc. Savings Plan for Union Hourly Employees? ▼
Among 401(k) plans in other states, the closest by assets is Innovairre Communications Retirement Income Savings Plan in NJ ($34M, 743 participants).
Which 401(k) plans cover a similar participant headcount to Koppers Inc. Savings Plan for Union Hourly Employees? ▼
Among 401(k) plans in other states, the closest by covered participants is J. a. Riggs Tractor Company Profit Sharing Plan in AR (463 participants, $72M 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.