Defined Benefit (Pension) · DOL Form 5500 · 2023
Trustees of the Intn'l Brotherhood of Boilermakers Iron Ship Builders, Pension Plan
Data updated 2026-07-24
- $140M
- Total assets
- 209
- Participants
- 93rd
- Percentile by assets
- $670,133
- Avg per participant
Official DOL plan name: International Brotherhood of Boilermakers Officers and Employees' Pension Plan · Sponsored by Trustees of the Intn'l Brotherhood of Boilermakers Iron Ship Builders, · Missouri · Manufacturing
$140M in assets, 209 participants
Trustees of the Intn'l Brotherhood of Boilermakers Iron Ship Builders,'s International Brotherhood of Boilermakers Officers and Employees' Pension Plan reported $140M in total assets and 209 participants in its 2023 DOL Form 5500 filing, ranking in the 93rd 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.
- 93rd percentile by assets (of 126,618 plans)
What the 2023 filing shows
International Brotherhood of Boilermakers Officers and Employees' Pension Plan holds $140M for 209 participants - about $670,133 per participant, in the top 10% of all filed plans by assets, up 6.9% over the 2023 plan year.
- $140M
- total plan assets (2023 EOY)
- 209
- covered participants
- 93rd
- percentile by assets (of 126,618 plans)
- $670,133
- avg assets per participant
Defined Benefit (Pension) · DOL Form 5500 · 2023
What the Filing Says About International Brotherhood of Boilermakers Officers and Employees' Pension Plan
International Brotherhood of Boilermakers Officers and Employees' Pension Plan is a Defined Benefit (Pension) retirement plan sponsored by Trustees of the Intn'l Brotherhood of Boilermakers Iron Ship Builders,, headquartered in Missouri. According to the U.S. Department of Labor's 2023 Form 5500 filing, the plan reports $140M in total end-of-year assets and covers 209 participants across the Manufacturing industry. The sponsor's EIN on file with the U.S. Department of Labor is 486031851, and the plan has been effective since 1951-01-16. Its filing status is currently FILING RECEIVED.
Year over year, total assets grew at a solid clip from $131M at the beginning of 2023 to $140M at year-end - up 6.9%. Net assets (after liabilities) closed the year at $140M, with reported net income of $9M driven by investment returns, contributions received, and benefit payments during the period. These figures reflect what the plan administrator certified on Schedule H or Schedule I of the Form 5500 annual return and can be compared against 2 prior plan-year filings from the same sponsor shown below.
Across the 3 plan years Trustees of the Intn'l Brotherhood of Boilermakers Iron Ship Builders, has on file with PlainRetire (2022-2024), sponsor-wide plan assets have moved from $131M to $148M, a gain of 12.6%, while reported participants moved from 205 to 202 (-1.5%). The strongest year on file by total sponsor assets was 2024 at $148M; the softest was 2022 at $131M. Year-by-year, sponsor-wide filings show: 2022 - $131M in assets across 1 plan covering 205 participants; 2023 - $140M in assets across 1 plan covering 209 participants; 2024 - $148M in assets across 1 plan covering 202 participants.
By assets, International Brotherhood of Boilermakers Officers and Employees' Pension Plan outranks 93% of the 126,618 plans that filed a Form 5500 for the 2023 plan year, and holds roughly 1.4x the national average plan size of $100M and 730 average participants.
Asset totals and participant counts reflect a single plan year snapshot and can change materially with market conditions, plan mergers, or workforce changes. Fields such as "net income" include both realized investment performance and contribution/distribution flows, a single-year figure does not by itself indicate plan health or participant outcomes. This page summarizes public DOL disclosures for research and educational purposes only and is not retirement, tax, legal, or financial advice. Before making decisions about your own retirement benefits or evaluating an employer's plan, verify the underlying filing directly via the DOL EFAST2 system and consult a qualified professional.
How the percentile is calculated: we count every plan that filed a 2023 Form 5500 with a reported end-of-year asset figure (126,618 plans), rank International Brotherhood of Boilermakers Officers and Employees' Pension Plan against all of them by total assets, and report the share of those plans it outranks. A plan reporting no asset figure for the year is excluded from the ranking rather than assumed to be zero.
Financial Summary (2023)
| Total Assets (Beginning of Year) | $131M |
|---|---|
| Total Assets (End of Year) | $140M |
| Net Assets (End of Year) | $140M |
| Net Income | $9M |
| Plan Type | Defined Benefit (Pension) |
| Employer EIN | 486031851 |
| Plan Effective Date | 1951-01-16 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Trustees of the Intn'l Brotherhood of Boilermakers Iron Ship Builders,)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 205 | $131M |
| 2023 | 1 | 209 | $140M |
| 2024 | 1 | 202 | $148M |
Nearby Defined Benefit (Pension) Plans in Missouri
Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.
International Brotherhood of Boilermakers Officers and Employees' Pension Plan vs. nearby Defined Benefit (Pension) plans in Missouri, assets vs. participants
- Boilermaker-Blacksmith National Pension Trust $7.8B · 30,358
- Ameren Retirement Plan $4.7B · 10,156
- Co-Op Retirement Plan $3.5B · 14,993
- Emerson Electric Company Retirement Plan $3.4B · 2,671
- Carpenters Pension Trust Fund of St. Louis $3.3B · 11,420
Similar-Sized Defined Benefit (Pension) Plans Nationally
Defined Benefit (Pension) plans in other states closest to International Brotherhood of Boilermakers Officers and Employees' Pension Plan by total assets, not by location.
- Stagehands Local Two Retirement Plan (IL) $140M · 1,527
- Bcom3 Cash Balance Plan (IL) $140M · 432
- Investors Bank Pension Plan (RI) $140M · 372
- Harbisonwalker International, Inc. Salary Pension Plan (PA) $140M · 236
Frequently Asked Questions
How much money is in the International Brotherhood of Boilermakers Officers and Employees' Pension Plan? ▼
What type of plan is International Brotherhood of Boilermakers Officers and Employees' Pension Plan? ▼
Who sponsors the International Brotherhood of Boilermakers Officers and Employees' Pension Plan? ▼
How did International Brotherhood of Boilermakers Officers and Employees' Pension Plan perform in 2023? ▼
What this filing means
Ways to act on International Brotherhood of Boilermakers Officers and Employees' Pension Plan's numbers.
- By total assets, International Brotherhood of Boilermakers Officers and Employees' Pension Plan ranks in the top 10% of all filed plans by assets. See the largest plans
- Compare it side-by-side against 3 similar Defined Benefit (Pension) plans in Missouri. Compare plans
- Trustees of the Intn'l Brotherhood of Boilermakers Iron Ship Builders,'s sponsor-wide assets have grown 12.6% since 2022 across 3 plan years on file. More Manufacturing plans
- A Defined Benefit (Pension) plan works differently from other retirement plan types, understand the structural differences before comparing. Compare plan types
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 486031851.
Reference: IRS Publication 560, Retirement Plans for Small Business, contribution-limit rules.
Reference: IRS Publication 590-B, Distributions from IRAs, RMD rules under SECURE Act 2.0.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainRetire is rendered directly from the Department of Labor's Form 5500 annual return filings, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-07-24.