How many subsidiaries does AMEREN CORP file with the SEC?

17, listed in its most recent exhibit 21. They are incorporated across 4 jurisdictions (Missouri, Delaware, Illinois, Colorado). That exhibit is filed with the company's annual report and is the company's own list, not an estimate.

Is AMEREN CORP financially healthy?

AMEREN CORP scores 6 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.

Who are the largest institutional holders of AMEREN CORP?

Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (adding), PRICE T ROWE ASSOCIATES INC /MD/ (trimming), STATE STREET CORP (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.

AMEREN CORP (AEE)

NYSE · Common Stock · Electric & Other Services Combined

One email a week from me: what it filed, which 13F holders added or cut, where its scores stand. Free.

electric power and natural gas utility holding company based in St. Louis, Missouri, U.S.

Corporate structure

17 entities across 4 jurisdictions. Read directly from the company’s own 10-K EX-21 filed 2026-02-18 — see the exhibit.

Which other public companies file entities in the same places:

Delaware8 Missouri4 Illinois4 Colorado1

Subsidiaries of AMEREN CORP as disclosed in its SEC filing
Entity	Jurisdiction	Note
Ameren Corporation	Missouri
Ameren Development Company	Missouri
Missouri Central Railroad Company	Delaware
QST Enterprises Inc.	Illinois
Ameren EIP Investment, LLC	Delaware
Ameren Accelerator Investments, LLC	Delaware
AmerenEnergy Medina Valley Cogen, L.L.C.	Illinois
Ameren Transmission Company, LLC	Delaware
ATX East, LLC	Delaware
ATX Southwest, LLC	Delaware
Lucky Corridor, LLC	Colorado
Ameren Transmission Company of Illinois	Illinois
Ameren Services Company	Missouri
Ameren Illinois Company (d/b/a Ameren Illinois)	Illinois
Union Electric Company (d/b/a Ameren Missouri)	Missouri
Ameren Missouri Securitization Funding I, LLC	Delaware
STARS Alliance, LLC (25% interest)	Delaware

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Piotroski F-score

6 / 8

PASSReturn on assets positiveROA 3.0%
PASSOperating cash flow positiveOCF 3.4B
PASSReturn on assets improving2.7% → 3.0%
PASSCash flow exceeds earningsOCF 3.4B vs NI 1.5B
PASSLong-term debt ratio falling38.7% → 37.6% of assets
FAILCurrent ratio improving0.66 → 0.66
FAILNo share dilution267M → 272M shares
FAILGross margin improvingno gross profit reported
PASSAsset turnover improving0.17× → 0.18×

Six-year record

Year	Revenue	Net income	Free cash flow	Gross margin	Shares
FY2020	$5.8B	$877.0M	−$942.0M	—	248,700,000
FY2021	$6.4B	$995.0M	−$1.3B	—	257,600,000
FY2022	$8.0B	$1.1B	−$1.1B	—	259,500,000
FY2023	$7.5B	$1.2B	−$1.0B	—	263,400,000
FY2024	$7.6B	$1.2B	−$1.6B	—	267,400,000
FY2025	$8.8B	$1.5B	−$775.0M	—	272,200,000

Ownership flow

13 institutions tracked — 8 added, 5 reduced.

Institutional holders of AMEREN CORP and their share-count change
Manager	Kind	Shares	Change	Value
BlackRock, Inc.	Index	25,818,527	+2,021,173	$2.9B
Point72 Asset Management, L.P.	Hedge fund	2,139,630	+1,443,881	$241.9M
PRICE T ROWE ASSOCIATES INC /MD/	Active fund	20,636,717	−724,907	$2.3B
AQR CAPITAL MANAGEMENT LLC	Hedge fund	944,272	−678,379	$106.7M
MORGAN STANLEY	Active fund	3,402,611	+475,065	$384.6M
STATE STREET CORP	Index	15,171,626	+242,242	$1.7B
FMR LLC	Active fund	4,786,206	−229,988	$541.0M
GEODE CAPITAL MANAGEMENT, LLC	Index	7,820,813	+162,556	$880.8M
RENAISSANCE TECHNOLOGIES LLC	Hedge fund	438,200	+150,000	$49.5M
BANK OF AMERICA CORP /DE/	Active fund	2,175,165	−89,857	$245.9M
Bridgewater Associates, LP	Hedge fund	141,897	+89,833	$16.0M
CITADEL ADVISORS LLC	Hedge fund	1,815,983	−37,194	$205.3M
JPMORGAN CHASE & CO	Active fund	1,457,904	+9,906	$167.1M

From 13F filings, which cover institutions managing over $100m and are filed up to 45 days after the quarter ends — so this is a considered position, not a live one, and it is not the whole shareholder register.

Identity

CIK: 0001002910
FIGI: BBG000B9X8C0
SIC: 4931 · Electric & Other Services Combined
Incorporated: MO
Headquarters: ST LOUIS, MO
Founded: 1997-00-00

Ownership

Institutional: 90.3%
Institutions: 1,260
Insiders: 0.3%

Ownership percentages are a vendor aggregate, not a filing — unlike everything else on this page.

Other electric & other services combined companies

AMEREN CORP files under SIC 4931 — all 8 electric & other services combined companies compared on assets and F-score.

Duke Energy CORPDUK EXELON CORPEXC XCEL ENERGY INCXEL WEC ENERGY GROUP, INC.WEC CMS ENERGY CORPCMS NISOURCE INC.NI

Dealer positioning — end of day

Where dealer gamma sat in AEE’s option chain after the close on 2026-09-01, aggregated from the full chain. This is a once-a-day snapshot, not a live read — 72 contracts.

Net gamma (per 1% move): $417,724.504
Gamma flip: 110
Call wall: 115
Put wall: 100
Spot at capture: 106.01

Computed from the listed option chain by my own aggregation, once, after the close — it describes where positioning sat that evening and does not update through the next session. The version that rebuilds per strike while the market is open is the intraday gamma product. Not investment advice.

Questions about AMEREN CORP

How many subsidiaries does AMEREN CORP file with the SEC?: 17, listed in its most recent exhibit 21. They are incorporated across 4 jurisdictions (Missouri, Delaware, Illinois, Colorado). That exhibit is filed with the company's annual report and is the company's own list, not an estimate.
Is AMEREN CORP financially healthy?: AMEREN CORP scores 6 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.
Who are the largest institutional holders of AMEREN CORP?: Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (adding), PRICE T ROWE ASSOCIATES INC /MD/ (trimming), STATE STREET CORP (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.

This page is one panel of the terminal

The structure map above is the Corporate Blueprint, and in the desktop it is interactive — click any entity to re-centre the map on it and walk the ownership chain. It sits alongside the screener, the scorecard and the filings lab on one desk, on your machine.

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Sourced from SEC EDGAR primary filings. Figures are as reported by the company and are not investment advice. Scores are standard published screens computed from those filings; every input is shown above so you can check the arithmetic.