Defined Benefit (Pension) · DOL Form 5500 · 2024
Ameren Corporation Pension Plan
Data updated 2026-08-25
- $4.8B
- Total assets Very large vs avg
- 9,760
- Participants Very large workforce
- 100th
- Percentile by assets National rank
- $491,730
- Avg per participant High balance/head
Official DOL plan name: Ameren Retirement Plan · Sponsored by Ameren Corporation · Missouri · Utilities
$4.8B in assets, 9,760 participants
Ameren Corporation's Ameren Retirement Plan reported $4.8B in total assets and 9,760 participants in its 2024 DOL Form 5500 filing, ranking in the 100th 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.
- #710 in Utilities (732 peers)
Coverage in Missouri
Ameren Retirement Plan covers 9,760 participants in Missouri, 13x the typical Missouri plan (state average ~737 per filing). Assets: $4.8B.
- #710
- in Utilities (732 peers)
- +1.9%
- assets growth YoY
- 48×
- vs typical plan assets (national mean)
The plan reported a net loss of $82M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
Ameren Retirement Plan's outsized position by total assets
Ameren Retirement Plan vs every filed plan by assets
End-of-year total assets · plan year 2024 · DOL Form 5500
$4,799,287,759 Highest reported value at or above every one of 123,620 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024
Ameren Retirement Plan's large-plan peer group by participant headcount
Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Ameren Retirement Plan lands in the large band (9,760 participants).
What changed between DOL Form 5500 filings
plan year 2023 → plan year 2024
- Ameren Retirement Plan reported net income fell from $266M in the plan year 2023 filing to -$82M in the plan year 2024 filing.
- Ameren Retirement Plan reported participants fell from 10,156 in the plan year 2023 filing to 9,760 in the plan year 2024 filing.
- Ameren Retirement Plan end-of-year assets rose from $4.7B in the plan year 2023 filing to $4.8B in the plan year 2024 filing.
Plan-year Form 5500 strip
Filing strip 431723446 · Ameren Corporation PY 2024 · Defined Benefit (Pension)
Ameren Retirement Plan · $4.8B · 9,760 · 100th
- NET $4.8B
- BOOK 9,760
- VS-ST 100th
- BOY Defined Benefit (Pension)
- SCH near National Automatic Sprinkler Industry Pension Fund
- EBSA ind #710
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 Utilities retirement plans → · Plans in Missouri →
Ameren Retirement Plan in the asset neighbourhood
Missouri filing particulars
| Total Assets (Beginning of Year) | $4.7B |
|---|---|
| Net Assets (End of Year) | $4.4B |
| Net Income | -$82M |
| Employer EIN | 431723446 |
| Plan Effective Date | 1941-01-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Ameren Corporation)
Sponsor-wide plan assets over time
All Ameren Corporation plans reported in each filing year
- Latest sponsor-wide plan assets
- $8.0B 18.962225529961195% vs 2022
- 2024 filing year
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 3 | 28,238 | $9.9B |
| 2023 | 2 | 19,512 | $7.7B |
| 2024 | 2 | 19,264 | $8.0B |
Nearby Defined Benefit (Pension) Plans in Missouri
Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.
- Boilermaker-Blacksmith National Pension Trust $7.5B · 28,958
- Co-Op Retirement Plan $3.5B · 15,151
- Carpenters Pension Trust Fund of St. Louis $3.4B · 11,832
- Emerson Electric Company Retirement Plan $3.3B · 2,467
- Bjc Pension Plan $2.7B · 20,653
Scale composition for Ameren Retirement Plan
Ameren Retirement Plan reports $4.8B in end-of-year assets across 9,760 participants (0.039% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.010% of 93,925,755 covered participants) - about $491,730 per participant (3.6x the national average assets-per-participant) . Net income for plan year 2024 was -$82M.
This plan identity (EIN 431723446, plan #005) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $4.4B to $4.8B (+8.0%) while covered participants moved from 10,080 to 9,760 . Single-year sparse filers cannot show that trail.
| Plan year | Participants | EOY assets | Filing |
|---|---|---|---|
| 2022 | 10,080 | $4.4B | Open filing |
| 2023 | 10,156 | $4.7B | Open filing |
| 2024 · index core | 9,760 | $4.8B | This page |
The same sponsor also keeps 1 other index-core plan on PlainRetire:
- Ameren Corporation Savings Investment Plan (401(k), $3.2B, 9,504 participants)
Ameren Retirement Plan's out-of-state Defined Benefit (Pension) peers by assets and headcount
Outside Missouri, the nearest Defined Benefit (Pension) by assets is National Automatic Sprinkler Industry Pension Fund in MD ($4.8B); by covered participants it is Michigan Laborers' Pension Plan in MI (9,786 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($4.8B here).
- National Automatic Sprinkler Industry Pension Fund (MD) $4.8B · 15,964
- Major League Baseball Players Pension Plan (MD) $4.8B · 1,091
- The Southern California Edison Company Retirement Plan (CA) $4.7B · 9,333
- Duke Energy Retirement Cash Balance Plan (NC) $4.7B · 13,576
Similar participant headcount
Nearest other-state filings by covered participants (9,760 participants); asset peers above are excluded.
- Michigan Laborers' Pension Plan (MI) 9,786 · 26 off
- California Ironworkers Field Pension Trust (CA) 9,792 · 32 off
- The University of Chicago Retirement Income Plan (IL) 9,810 · 50 off
- Retirement Plan for Employees of Aetna Inc. (CT) 9,682 · 78 off
DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.