Segment Information (Tables)

3 Months Ended

Mar. 31, 2025

Schedule Of Segment Reporting Information By Segment

The following tables present revenues, net income attributable to common shareholders, and capital expenditures by segment at Ameren and Ameren Illinois for the three months ended March 31, 2025 and 2024. Ameren, Ameren Missouri, and Ameren Illinois management review segment capital expenditure information rather than any individual or total asset amount. For additional information about our segments, see Note 16 – Segment Information under Part II, Item 8, of the Form 10-K.

Ameren


	Ameren Missouri		Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Transmission			Other		Intersegment Eliminations		Ameren




































Three Months 2025:
External revenues	$	950	$	570	$	411	$	166		$	—	$	—	$	2,097
Intersegment revenues	7		2		—		44			—		(53)		—
Revenue	957		572		411		210			—		(53)		2,097
Fuel and purchased power(a)	(330)		(212)		—		—			—		40		(502)
Natural gas purchased for resale(a)	(30)		—		(139)		—			—		—		(169)
Other operations and maintenance expenses(a)	(250)		(166)		(55)		(19)			(8)		13		(485)
Other segment items
Depreciation and amortization	(194)		(91)		(32)		(48)			(2)		—		(367)
Taxes other than income taxes	(89)		(21)		(29)		(1)			(4)		—		(144)
Other income, net	43		23		5		7			8		(1)		85
Interest charges	(60)		(26)		(15)		(29)			(46)		1		(175)
Income (taxes) benefit	(4)		(16)		(38)		(31)			39		—		(50)
Noncontrolling interests – preferred stock dividends	(1)		—		—		—			—		—		(1)
Net income (loss) attributable to Ameren common shareholders	42		63		108		89		(b)	(13)		—		289

Interest income	2		8		—		1			1		(1)		11
Capital expenditures	658		167		59		173			2		5		1,064
Three Months 2024:
External revenues	$	768	$	506	$	391	$	151		$	—	$	—	$	1,816
Intersegment revenues	7		—		—		34			—		(41)		—
Revenue	775		506		391		185			—		(41)		1,816
Fuel and purchased power(a)	(166)		(192)		—		—			—		30		(328)
Natural gas purchased for resale(a)	(28)		—		(123)		—			—		—		(151)
Other operations and maintenance expenses(a)	(254)		(136)		(58)		(19)			(14)		11		(470)
Other segment items
Depreciation and amortization	(195)		(93)		(33)		(39)			(1)		—		(361)
Taxes other than income taxes	(87)		(17)		(26)		(2)			(3)		—		(135)
Other income, net	44		22		7		2			20		(6)		89
Interest charges	(62)		(22)		(15)		(29)			(32)		6		(154)
Income (taxes) benefit	(1)		(12)		(37)		(26)			32		—		(44)
Noncontrolling interests – preferred stock dividends	(1)		—		—		—			—		—		(1)
Net income attributable to Ameren common shareholders	25		56		106		72		(b)	2		—		261

Interest income	2		6		—		—			6		(6)		8
Capital expenditures	466		184		60		166			2		12		890

(a)Significant segment expense that is regularly provided to the CODMs. Intersegment expenses are included within the amounts shown.

(b)Ameren Transmission earnings reflect an allocation of financing costs from Ameren (parent).

Ameren Illinois


	Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Illinois Transmission		Intersegment Eliminations		Ameren Illinois




































Three Months 2025:
External revenues	$	572	$	411	$	117	$	—	$	1,100
Intersegment revenues	—		—		37		(37)		—
Revenue	572		411		154		(37)		1,100
Purchased power(a)	(212)		—		—		37		(175)
Natural gas purchased for resale(a)	—		(139)		—		—		(139)
Other operations and maintenance expenses(a)	(166)		(55)		(15)		—		(236)
Other segment items
Depreciation and amortization	(91)		(32)		(36)		—		(159)
Taxes other than income taxes	(21)		(29)		(1)		—		(51)
Other income, net	23		5		6		—		34
Interest charges	(26)		(15)		(21)		—		(62)
Income taxes	(16)		(38)		(22)		—		(76)

Net income available to common shareholder	63		108		65		—		236

Interest income	8		—		1		—		9
Capital expenditures	167		59		137		—		363
Three Months 2024:
External revenues	$	506	$	391	$	103	$	—	$	1,000
Intersegment revenues	—		—		28		(28)		—
Revenue	506		391		131		(28)		1,000
Purchased power(a)	(192)		—		—		28		(164)
Natural gas purchased for resale(a)	—		(123)		—		—		(123)
Other operations and maintenance expenses(a)	(136)		(58)		(16)		—		(210)
Other segment items
Depreciation and amortization	(93)		(33)		(27)		—		(153)
Taxes other than income taxes	(17)		(26)		(1)		—		(44)
Other income, net	22		7		2		—		31
Interest charges	(22)		(15)		(18)		—		(55)
Income taxes	(12)		(37)		(18)		—		(67)

Net income available to common shareholder	56		106		53		—		215

Interest income	6		—		—		—		6
Capital expenditures	184		60		129		—		373

(a)Significant segment expense that is regularly provided to the CODMs. Intersegment expenses are included within the amounts shown.

Disaggregation of Revenue

The following tables present disaggregated revenues by segment at Ameren and Ameren Illinois for the three months ended March 31, 2025 and 2024. Economic factors affect the nature, timing, amount, and uncertainty of revenues and cash flows in a similar manner across customer classes. Revenues from alternative revenue programs have a similar distribution among customer classes as revenues from contracts with customers. Other revenues not associated with contracts with customers are presented in the Other customer classification, along with electric transmission, off-system sales, and capacity revenues.

Ameren


	Ameren Missouri		Ameren Illinois Electric Distribution			Ameren Illinois Natural Gas		Ameren Transmission		Intersegment Eliminations		Ameren
























Three Months 2025:
Residential	$	376	$	342		$	—	$	—	$	—	$	718
Commercial	273		180			—		—		—		453
Industrial	66		50			—		—		—		116
Other	178		—			—		210		(53)		335
Total electric revenues	$	893	$	572		$	—	$	210	$	(53)	$	1,622
Residential	$	43	$	—		$	309	$	—	$	—	$	352
Commercial	19		—			77		—		—		96
Industrial	2		—			4		—		—		6
Other	—		—			21		—		—		21
Total natural gas revenues	$	64	$	—		$	411	$	—	$	—	$	475
Total revenues(a)	$	957	$	572		$	411	$	210	$	(53)	$	2,097
Three Months 2024:
Residential	$	341	$	297		$	—	$	—	$	—	$	638
Commercial	259		165			—		—		—		424
Industrial	61		45			—		—		—		106
Other	53		(1)		(b)	—		185		(41)		196
Total electric revenues	$	714	$	506		$	—	$	185	$	(41)	$	1,364
Residential	$	40	$	—		$	287	$	—	$	—	$	327
Commercial	16		—			68		—		—		84
Industrial	2		—			4		—		—		6
Other	3		—			32		—		—		35
Total natural gas revenues	$	61	$	—		$	391	$	—	$	—	$	452
Total revenues(a)	$	775	$	506		$	391	$	185	$	(41)	$	1,816

(a)The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the three months ended March 31, 2025 and 2024:


	Ameren Missouri		Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Transmission		Ameren






Three Months 2025:
Revenues from alternative revenue programs	$	(5)	$	21	$	3	$	(1)	$	18
Other revenues not from contracts with customers	1		3		1		—		5
Three Months 2024:
Revenues from alternative revenue programs	$	(6)	$	39	$	19	$	9	$	61
Other revenues not from contracts with customers	1		2		1		—		4

(b)Includes over-recoveries of various riders.

Ameren Illinois


	Ameren Illinois Electric Distribution			Ameren Illinois Natural Gas		Ameren Illinois Transmission		Intersegment Eliminations		Ameren Illinois












Three Months 2025:
Residential	$	342		$	309	$	—	$	—	$	651
Commercial	180			77		—		—		257
Industrial	50			4		—		—		54
Other	—			21		154		(37)		138
Total revenues(a)	$	572		$	411	$	154	$	(37)	$	1,100
Three Months 2024:
Residential	$	297		$	287	$	—	$	—	$	584
Commercial	165			68		—		—		233
Industrial	45			4		—		—		49
Other	(1)		(b)	32		131		(28)		134
Total revenues(a)	$	506		$	391	$	131	$	(28)	$	1,000

(a)The following table presents increases/(decreases) in revenues from alternative revenue programs and other revenues not from contracts with customers for the Ameren Illinois segments for the three months ended March 31, 2025 and 2024:


	Ameren Illinois Electric Distribution		Ameren Illinois Natural Gas		Ameren Illinois Transmission		Ameren Illinois






Three Months 2025:
Revenues from alternative revenue programs	$	21	$	3	$	(1)	$	23
Other revenues not from contracts with customers	3		1		—		4
Three Months 2024:
Revenues from alternative revenue programs	$	39	$	19	$	8	$	66
Other revenues not from contracts with customers	2		1		—		3

(b)Includes over-recoveries of various riders.