Defined Benefit (Pension) · DOL Form 5500 · 2024
Ameren Corporation Pension Plan
Data updated 2026-08-06
- $4.8B
- Total assets
- 9,760
- Participants
- 100th
- Percentile by assets
- $491,730
- Avg per participant
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.
- 100th percentile by assets (of 116,472 plans)
- #685 in Utilities (707 peers)
Coverage in Missouri
Ameren Retirement Plan covers 9,760 participants in Missouri, 13x the typical Missouri plan (state average ~756 per filing). Assets: $4.8B.
- $4.8B
- total plan assets (2024 EOY)
- 9,760
- covered participants
- 100th
- percentile by assets (of 116,472 plans)
- $491,730
- avg assets per participant
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.
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.
Participants vs Missouri filers
In Missouri, the average filing covers about 756 participants across 2,155 plans. Ameren Retirement Plan reports 9,760 participants - 13x that state average ($4.8B EOY assets).
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)
| 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.
Ameren Retirement Plan vs. nearby Defined Benefit (Pension) plans in Missouri, assets vs. participants
- 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
- Bjc Pension Plan $2.7B · 20,653
- Bayer Corporation Pension Plan $2.0B · 1,464
Scale composition for Ameren Retirement Plan
Ameren Retirement Plan reports $4.8B in end-of-year assets across 9,760 participants (0.041% of the $11.6T held by all Form 5500 filers in the national rollup , and 0.011% of 89,805,449 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)
Similar-Sized Defined Benefit (Pension) Plans Nationally
Defined Benefit (Pension) plans in other states closest to Ameren Retirement Plan by total assets, not by location.
- 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
Frequently Asked Questions
How did Ameren Retirement Plan assets move in 2024? ▼
How have Ameren Corporation plan assets changed over time? ▼
Where does Ameren Retirement Plan rank by assets among Form 5500 filers? ▼
Which Defined Benefit (Pension) plans are similar in size to Ameren Retirement Plan? ▼
Next read for Ameren Retirement Plan
Filing takeaways
Ways to act on Ameren Retirement Plan's numbers.
- By total assets, Ameren Retirement Plan ranks among the largest 1% of all filed plans. See the largest plans
- Compare it side-by-side against 3 similar Defined Benefit (Pension) plans in Missouri. Compare plans
- Ameren Corporation's sponsor-wide assets have declined 19.0% since 2022 across 3 plan years on file. More Utilities plans