English

INTERSTATE POWER & LIGHT CO

EDGAR

Report (type unavailable) · filed 2026-07-31

141 filing records in this dataset, filed from 1994-03-29 to 2026-07-31. Explore the available filing history and original sources.

Inspect reported changes Compare with another company Historical disclosures Search filings Segments

Watchlist

Latest quarter

Revenue

1.02 billion USD

2011-09-30 · USD

Exact inputs and evidence

Revenue: 1021600000 USD Source

Operating margin

18.12%

2011-09-30 · %

Exact inputs and evidence

Operating Income: 185100000 USD Source
Revenue: 1021600000 USD Source

Operating cash flow

146 million USD

2011-09-30 · USD

Exact inputs and evidence

Operating Cash Flow: 612700000 USD Source
Operating Cash Flow: 466800000 USD Source

Cash and cash equivalents: 45.7 million USD 2011-09-30 Source
Exact value

45700000 USD
Long-term debt including current maturities: Not available
Shares outstanding: Not available

Trailing twelve months

The four most recent complete quarters added together. This gives a full-year view that includes the latest quarterly results.

Revenue

3.62 billion USD

2010-10-01 – 2011-09-30

Exact inputs and evidence

Revenue: 3416100000 USD · 2010-01-01 – 2010-12-31 Source
Revenue: 2583500000 USD · 2010-01-01 – 2010-09-30 Source
Revenue: 945000000 USD · 2011-01-01 – 2011-03-31 Source
Revenue: 819500000 USD · 2011-04-01 – 2011-06-30 Source
Revenue: 1021600000 USD · 2011-07-01 – 2011-09-30 Source

Net income

294 million USD

2010-10-01 – 2011-09-30

Exact inputs and evidence

Net income: 287600000 USD · 2010-01-01 – 2010-12-31 Source
Net income: 240300000 USD · 2010-01-01 – 2010-09-30 Source
Net income: 73500000 USD · 2011-01-01 – 2011-03-31 Source
Net income: 51100000 USD · 2011-04-01 – 2011-06-30 Source
Net income: 122000000 USD · 2011-07-01 – 2011-09-30 Source

Operating cash flow

902 million USD

2010-10-01 – 2011-09-30

Exact inputs and evidence

Operating cash flow: 984900000 USD · 2010-01-01 – 2010-12-31 Source
Operating cash flow: 695600000 USD · 2010-01-01 – 2010-09-30 Source
Operating cash flow: 261300000 USD · 2011-01-01 – 2011-03-31 Source
Operating cash flow: 466800000 USD · 2011-01-01 – 2011-06-30 Source
Operating cash flow: 261300000 USD · 2011-01-01 – 2011-03-31 Source
Operating cash flow: 612700000 USD · 2011-01-01 – 2011-09-30 Source
Operating cash flow: 466800000 USD · 2011-01-01 – 2011-06-30 Source

Includes later revisions to earlier periods. Annual charts exclude incomplete years.

Latest filing recorded: 2026-07-31.

Financial data available through: 2010-12-31.

Financial coverage is incomplete. Newer filings are recorded, but comparable financial figures for those periods are not available here yet.

Coverage by financial measure

Revenue: 5 of 11 periods available· newest 2010-12-31
Operating income: 7 of 11 periods available· newest 2010-12-31
Net income: 8 of 11 periods available· newest 2010-12-31
Operating cash flow: 9 of 11 periods available· newest 2010-12-31
capital expenditure: No compatible figures in this window
Total assets: 5 of 11 periods available· newest 2010-12-31
liabilities: No compatible figures in this window
Current assets: 2 of 11 periods available· newest 2010-12-31
Current liabilities: 5 of 11 periods available· newest 2010-12-31
Cash and cash equivalents: 5 of 11 periods available· newest 2010-12-31
long term debt: No compatible figures in this window
shares outstanding: No compatible figures in this window

Coverage describes values retained in this snapshot. Missing values are not zero; loading limits are reported separately.

What changed year over year

Latest complete year compared with the corresponding period one year earlier. These are measured changes; they do not establish their business causes.

Revenue
-0.3%

Prior period

USD 3.43 billion

2009-01-01 – 2009-12-31
Current period

USD 3.42 billion

2010-01-01 – 2010-12-31

Exact inputs and evidence

3416100000 − 3427300000 = -11200000 USD

3427300000 USD · 2009-01-01 – 2009-12-31
Inspect prior input Prior source
3416100000 USD · 2010-01-01 – 2010-12-31
Inspect current input Current source

Share or cite

Citation for Year-over-year change in Revenue · INTERSTATE POWER & LIGHT CO · 2010-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Year-over-year change in Revenue: -11200000 USD Concept: fundies:Revenue Period: 2010-01-01 to 2010-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:Revenue: 3416100000 USD (2010-01-01 to 2010-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#26344 Input fundies:Revenue: 3427300000 USD (2009-01-01 to 2009-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#26344
The citation records this snapshot. The page link may show a newer release later.
Net income
+159.1%

Prior period

USD 111 million

2009-01-01 – 2009-12-31
Current period

USD 287.6 million

2010-01-01 – 2010-12-31

Exact inputs and evidence

287600000 − 111000000 = 176600000 USD

111000000 USD · 2009-01-01 – 2009-12-31
Inspect prior input Prior source
287600000 USD · 2010-01-01 – 2010-12-31
Inspect current input Current source

Share or cite

Citation for Year-over-year change in Net income · INTERSTATE POWER & LIGHT CO · 2010-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Year-over-year change in Net income: 176600000 USD Concept: fundies:NetIncome Period: 2010-01-01 to 2010-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:NetIncome: 287600000 USD (2010-01-01 to 2010-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#27229 Input fundies:NetIncome: 111000000 USD (2009-01-01 to 2009-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#27229
The citation records this snapshot. The page link may show a newer release later.
Operating cash flow
+49.9%

Prior period

USD 657.1 million

2009-01-01 – 2009-12-31
Current period

USD 984.9 million

2010-01-01 – 2010-12-31

Exact inputs and evidence

984900000 − 657100000 = 327800000 USD

657100000 USD · 2009-01-01 – 2009-12-31
Inspect prior input Prior source
984900000 USD · 2010-01-01 – 2010-12-31
Inspect current input Current source

Share or cite

Citation for Year-over-year change in Operating cash flow · INTERSTATE POWER & LIGHT CO · 2010-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Year-over-year change in Operating cash flow: 327800000 USD Concept: fundies:OperatingCashFlow Period: 2010-01-01 to 2010-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:OperatingCashFlow: 984900000 USD (2010-01-01 to 2010-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#28985 Input fundies:OperatingCashFlow: 657100000 USD (2009-01-01 to 2009-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#28985
The citation records this snapshot. The page link may show a newer release later.

Comparable inputs unavailable for: Capital expenditure.

Where revenue goes

How a period’s revenue divides into costs and what remains as profit. Items marked Derived are calculated by subtraction from reported figures.

2010 2010-01-01 – 2010-12-31

Revenue USD 3.42 billion 100% of revenue
Operating costs Derived USD 2.86 billion 84% of revenue
Operating income USD 556.1 million 16% of revenue
Tax, interest and other Derived USD 268.5 million 7.9% of revenue
Net income USD 287.6 million 8.4% of revenue

Cash

Operating cash flow USD 984.9 million 29% of revenue
Capital expenditure Unavailable An input is unavailable.
Free cash flow Derived Unavailable An input is unavailable.

Share of revenue by period

Net income
Tax, interest and other
Operating costs

2000 Net income was higher than operating income, so the split is not drawn.
2001 88%
2008 87%
2009 88%
2010 84%

Values and sources

Revenue breakdown by annual reporting period
Period	Revenue	Operating costs	Operating income	Tax, interest and other	Net income	Free cash flow	Source
2000 2000-01-01 – 2000-12-31	2404984000	2023928000 Derived	381056000	-17606000 Derived	398662000	Unavailable	Source 2000-01-01 – 2000-12-31: 2404984000 USD Inspect Revenue Open source 2000-01-01 – 2000-12-31: 381056000 USD Inspect Operating Income Open source 2000-01-01 – 2000-12-31: 398662000 USD Inspect Net Income Open source 2000-01-01 – 2000-12-31: 439881000 USD Inspect Operating Cash Flow Open source
2001 2001-01-01 – 2001-12-31	2777340000	2441235000 Derived	336105000	163743000 Derived	172362000	Unavailable	Source 2001-01-01 – 2001-12-31: 2777340000 USD Inspect Revenue Open source 2001-01-01 – 2001-12-31: 336105000 USD Inspect Operating Income Open source 2001-01-01 – 2001-12-31: 172362000 USD Inspect Net Income Open source 2001-01-01 – 2001-12-31: 433346000 USD Inspect Operating Cash Flow Open source
2008 2008-01-01 – 2008-12-31	3669100000	3182100000 Derived	487000000	199000000 Derived	288000000	Unavailable	Source 2008-01-01 – 2008-12-31: 3669100000 USD Inspect Revenue Open source 2008-01-01 – 2008-12-31: 487000000 USD Inspect Operating Income Open source 2008-01-01 – 2008-12-31: 288000000 USD Inspect Net Income Open source 2008-01-01 – 2008-12-31: 338200000 USD Inspect Operating Cash Flow Open source
2009 2009-01-01 – 2009-12-31	3427300000	3031100000 Derived	396200000	285200000 Derived	111000000	Unavailable	Source 2009-01-01 – 2009-12-31: 3427300000 USD Inspect Revenue Open source 2009-01-01 – 2009-12-31: 396200000 USD Inspect Operating Income Open source 2009-01-01 – 2009-12-31: 111000000 USD Inspect Net Income Open source 2009-01-01 – 2009-12-31: 657100000 USD Inspect Operating Cash Flow Open source
2010 2010-01-01 – 2010-12-31	3416100000	2860000000 Derived	556100000	268500000 Derived	287600000	Unavailable	Source 2010-01-01 – 2010-12-31: 3416100000 USD Inspect Revenue Open source 2010-01-01 – 2010-12-31: 556100000 USD Inspect Operating Income Open source 2010-01-01 – 2010-12-31: 287600000 USD Inspect Net Income Open source 2010-01-01 – 2010-12-31: 984900000 USD Inspect Operating Cash Flow Open source

Amounts are exact, in USD.

Growth

Sales over time and how quickly they are changing.

Revenue

Revenue reported for each complete financial period.

USD 3.4B 2010

Values and sources

Revenue values and source evidence
Period	Series	Value(USD)	Source evidence
20002000-12-31	Revenue	2404984000	Revenue: 2404984000 Open source
20012001-12-31	Revenue	2777340000	Revenue: 2777340000 Open source
20082008-12-31	Revenue	3669100000	Revenue: 3669100000 Open source
20092009-12-31	Revenue	3427300000	Revenue: 3427300000 Open source
20102010-12-31	Revenue	3416100000	Revenue: 3416100000 Open source

Revenue growth

Change in revenue from the same financial period one year earlier.

-0.3% 2010

Values and sources

Revenue growth values and source evidence
Period	Series	Value	Source evidence
20002000-12-31	Year over year	No prior comparable period	Revenue: 2404984000 Open source
20012001-12-31	Year over year	15.5%	Revenue: 2777340000 Open source Revenue: 2404984000 Open source
20082008-12-31	Year over year	No prior comparable period	Revenue: 3669100000 Open source
20092009-12-31	Year over year	-6.6%	Revenue: 3427300000 Open source Revenue: 3669100000 Open source
20102010-12-31	Year over year	-0.3%	Revenue: 3416100000 Open source Revenue: 3427300000 Open source

Profit and cash

How much revenue becomes profit, and how much cash operations generate.

Profit margins

Operating income, net income and free cash flow as a share of revenue.

Operating margin 16.3% 2010

Net margin 8.4% 2010

Operating margin
Net margin
Free cash flow margin

Values and sources

Profit margins values and source evidence
Period	Series	Value	Source evidence
20002000-12-31	Operating margin	15.8%	Operating Income: 381056000 Open source Revenue: 2404984000 Open source
20012001-12-31	Operating margin	12.1%	Operating Income: 336105000 Open source Revenue: 2777340000 Open source
20082008-12-31	Operating margin	13.3%	Operating Income: 487000000 Open source Revenue: 3669100000 Open source
20092009-12-31	Operating margin	11.6%	Operating Income: 396200000 Open source Revenue: 3427300000 Open source
20102010-12-31	Operating margin	16.3%	Operating Income: 556100000 Open source Revenue: 3416100000 Open source
20002000-12-31	Net margin	16.6%	Net Income: 398662000 Open source Revenue: 2404984000 Open source
20012001-12-31	Net margin	6.2%	Net Income: 172362000 Open source Revenue: 2777340000 Open source
20082008-12-31	Net margin	7.8%	Net Income: 288000000 Open source Revenue: 3669100000 Open source
20092009-12-31	Net margin	3.2%	Net Income: 111000000 Open source Revenue: 3427300000 Open source
20102010-12-31	Net margin	8.4%	Net Income: 287600000 Open source Revenue: 3416100000 Open source
20002000-12-31	Free cash flow margin	Not reported	Revenue: 2404984000 Open source Operating Cash Flow: 439881000 Open source
20012001-12-31	Free cash flow margin	Not reported	Revenue: 2777340000 Open source Operating Cash Flow: 433346000 Open source
20082008-12-31	Free cash flow margin	Not reported	Revenue: 3669100000 Open source Operating Cash Flow: 338200000 Open source
20092009-12-31	Free cash flow margin	Not reported	Revenue: 3427300000 Open source Operating Cash Flow: 657100000 Open source
20102010-12-31	Free cash flow margin	Not reported	Revenue: 3416100000 Open source Operating Cash Flow: 984900000 Open source

Operating cash flow

Cash generated by the company’s normal business operations.

USD 984.9M 2010

Values and sources

Operating cash flow values and source evidence
Period	Series	Value(USD)	Source evidence
20002000-12-31	Operating cash flow	439881000	Operating Cash Flow: 439881000 Open source
20012001-12-31	Operating cash flow	433346000	Operating Cash Flow: 433346000 Open source
20082008-12-31	Operating cash flow	338200000	Operating Cash Flow: 338200000 Open source
20092009-12-31	Operating cash flow	657100000	Operating Cash Flow: 657100000 Open source
20102010-12-31	Operating cash flow	984900000	Operating Cash Flow: 984900000 Open source

Free cash flow

Operating cash flow minus capital expenditure for the same period and unit.

Not enough comparable data to show this history.

Values and sources

Free cash flow values and source evidence
Period	Series	Value(USD)	Source evidence
20002000-12-31	Free cash flow	Unavailable	Operating Cash Flow: 439881000 Open source
20012001-12-31	Free cash flow	Unavailable	Operating Cash Flow: 433346000 Open source
20082008-12-31	Free cash flow	Unavailable	Operating Cash Flow: 338200000 Open source
20092009-12-31	Free cash flow	Unavailable	Operating Cash Flow: 657100000 Open source
20102010-12-31	Free cash flow	Unavailable	Operating Cash Flow: 984900000 Open source

Balance sheet

Liabilities and short-term ability to meet obligations at each period end.

Liabilities to assets

Total liabilities as a share of total assets.

Not enough comparable data to show this history.

Values and sources

Liabilities to assets values and source evidence
Period	Series	Value	Source evidence
2000-12-31	Liabilities / assets	Not reported	Total Assets: 6733766000 Open source
2001-12-31	Liabilities / assets	Not reported	Total Assets: 6247682000 Open source
2008-12-31	Liabilities / assets	Not reported	Total Assets: 8201500000 Open source
2009-12-31	Liabilities / assets	Not reported	Total Assets: 9036000000 Open source
2010-12-31	Liabilities / assets	Not reported	Total Assets: 9282900000 Open source

Current assets to current liabilities

Current assets divided by current liabilities.

1.26× 2010

Values and sources

Current assets to current liabilities values and source evidence
Period	Series	Value	Source evidence
2000-12-31	Current assets / current liabilities	Not reported	Current Liabilities: 1154335000 Open source
2001-12-31	Current assets / current liabilities	Not reported	Current Liabilities: 739737000 Open source
2008-12-31	Current assets / current liabilities	Not reported	Current Liabilities: 1038200000 Open source
20092009-12-31	Current assets / current liabilities	1.29×	Current Assets: 1390000000 Open source Current Liabilities: 1076600000 Open source
20102010-12-31	Current assets / current liabilities	1.26×	Current Assets: 1092700000 Open source Current Liabilities: 866700000 Open source

Cash generation

Compare reported profit with operating cash and capital spending. Free cash flow is calculated as operating cash flow minus capital expenditure when both exact, consolidated amounts match the same period and unit.

Cash generation by annual reporting period
Period	Net income	Operating cash flow	Capital expenditure	Free cash flow
2000 2000-01-01 – 2000-12-31	USD 398.66 million Exact value Exact value: 398662000 USD 2000-01-01 – 2000-12-31: 398662000 USD Inspect Net Income Open source Share or cite Citation for Net Income · INTERSTATE POWER & LIGHT CO · 2000-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Net Income: 398662000 USD Concept: fundies:NetIncome Period: 2000-01-01 to 2000-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3ANetIncome&period=2000-12-31&surface=latest&period_type=duration&start=2000-01-01&unit=USD&dimensions= Input fundies:NetIncome: 398662000 USD (2000-01-01 to 2000-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-02-000027.txt#4985 The citation records this snapshot. The page link may show a newer release later.	USD 439.88 million Exact value Exact value: 439881000 USD 2000-01-01 – 2000-12-31: 439881000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2000-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 439881000 USD Concept: fundies:OperatingCashFlow Period: 2000-01-01 to 2000-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2000-12-31&surface=latest&period_type=duration&start=2000-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 439881000 USD (2000-01-01 to 2000-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-02-000027.txt#5008 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.
2001 2001-01-01 – 2001-12-31	USD 172.36 million Exact value Exact value: 172362000 USD 2001-01-01 – 2001-12-31: 172362000 USD Inspect Net Income Open source Share or cite Citation for Net Income · INTERSTATE POWER & LIGHT CO · 2001-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Net Income: 172362000 USD Concept: fundies:NetIncome Period: 2001-01-01 to 2001-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3ANetIncome&period=2001-12-31&surface=latest&period_type=duration&start=2001-01-01&unit=USD&dimensions= Input fundies:NetIncome: 172362000 USD (2001-01-01 to 2001-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-04-000096.txt#11370 The citation records this snapshot. The page link may show a newer release later.	USD 433.35 million Exact value Exact value: 433346000 USD 2001-01-01 – 2001-12-31: 433346000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2001-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 433346000 USD Concept: fundies:OperatingCashFlow Period: 2001-01-01 to 2001-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2001-12-31&surface=latest&period_type=duration&start=2001-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 433346000 USD (2001-01-01 to 2001-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-04-000096.txt#11524 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.
2002 2002-01-01 – 2002-12-31	USD 106.88 million Exact value Exact value: 106881000 USD 2002-01-01 – 2002-12-31: 106881000 USD Inspect Net Income Open source Share or cite Citation for Net Income · INTERSTATE POWER & LIGHT CO · 2002-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Net Income: 106881000 USD Concept: fundies:NetIncome Period: 2002-01-01 to 2002-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3ANetIncome&period=2002-12-31&surface=latest&period_type=duration&start=2002-01-01&unit=USD&dimensions= Input fundies:NetIncome: 106881000 USD (2002-01-01 to 2002-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-04-000096.txt#11370 The citation records this snapshot. The page link may show a newer release later.	USD 555.34 million Exact value Exact value: 555338000 USD 2002-01-01 – 2002-12-31: 555338000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2002-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 555338000 USD Concept: fundies:OperatingCashFlow Period: 2002-01-01 to 2002-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2002-12-31&surface=latest&period_type=duration&start=2002-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 555338000 USD (2002-01-01 to 2002-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-04-000096.txt#11524 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.
2003 2003-01-01 – 2003-12-31	USD 183.54 million Exact value Exact value: 183543000 USD 2003-01-01 – 2003-12-31: 183543000 USD Inspect Net Income Open source Share or cite Citation for Net Income · INTERSTATE POWER & LIGHT CO · 2003-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Net Income: 183543000 USD Concept: fundies:NetIncome Period: 2003-01-01 to 2003-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3ANetIncome&period=2003-12-31&surface=latest&period_type=duration&start=2003-01-01&unit=USD&dimensions= Input fundies:NetIncome: 183543000 USD (2003-01-01 to 2003-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-04-000096.txt#11370 The citation records this snapshot. The page link may show a newer release later.	USD 419.99 million Exact value Exact value: 419990000 USD 2003-01-01 – 2003-12-31: 419990000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2003-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 419990000 USD Concept: fundies:OperatingCashFlow Period: 2003-01-01 to 2003-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2003-12-31&surface=latest&period_type=duration&start=2003-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 419990000 USD (2003-01-01 to 2003-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-04-000096.txt#11524 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.
2006 2006-01-01 – 2006-12-31	USD 315 million Exact value Exact value: 315000000 USD 2006-01-01 – 2006-12-31: 315000000 USD Inspect Net Income Open source Share or cite Citation for Net Income · INTERSTATE POWER & LIGHT CO · 2006-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Net Income: 315000000 USD Concept: fundies:NetIncome Period: 2006-01-01 to 2006-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3ANetIncome&period=2006-12-31&surface=latest&period_type=duration&start=2006-01-01&unit=USD&dimensions= Input fundies:NetIncome: 315000000 USD (2006-01-01 to 2006-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-07-000058.txt#16995 The citation records this snapshot. The page link may show a newer release later.	USD 420 million Exact value Exact value: 420000000 USD 2006-01-01 – 2006-12-31: 420000000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2006-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 420000000 USD Concept: fundies:OperatingCashFlow Period: 2006-01-01 to 2006-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2006-12-31&surface=latest&period_type=duration&start=2006-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 420000000 USD (2006-01-01 to 2006-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000107832-07-000058.txt#17195 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.
2007 2007-01-01 – 2007-12-31	Unavailable Not reported for this period.	USD 607.5 million Exact value Exact value: 607500000 USD 2007-01-01 – 2007-12-31: 607500000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2007-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 607500000 USD Concept: fundies:OperatingCashFlow Period: 2007-01-01 to 2007-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2007-12-31&surface=latest&period_type=duration&start=2007-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 607500000 USD (2007-01-01 to 2007-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0000352541-10-000009.txt#37695 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.
2008 2008-01-01 – 2008-12-31	USD 288 million Exact value Exact value: 288000000 USD 2008-01-01 – 2008-12-31: 288000000 USD Inspect Net Income Open source Share or cite Citation for Net Income · INTERSTATE POWER & LIGHT CO · 2008-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Net Income: 288000000 USD Concept: fundies:NetIncome Period: 2008-01-01 to 2008-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3ANetIncome&period=2008-12-31&surface=latest&period_type=duration&start=2008-01-01&unit=USD&dimensions= Input fundies:NetIncome: 288000000 USD (2008-01-01 to 2008-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#27229 The citation records this snapshot. The page link may show a newer release later.	USD 338.2 million Exact value Exact value: 338200000 USD 2008-01-01 – 2008-12-31: 338200000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2008-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 338200000 USD Concept: fundies:OperatingCashFlow Period: 2008-01-01 to 2008-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2008-12-31&surface=latest&period_type=duration&start=2008-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 338200000 USD (2008-01-01 to 2008-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#28985 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.
2009 2009-01-01 – 2009-12-31	USD 111 million Exact value Exact value: 111000000 USD 2009-01-01 – 2009-12-31: 111000000 USD Inspect Net Income Open source Share or cite Citation for Net Income · INTERSTATE POWER & LIGHT CO · 2009-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Net Income: 111000000 USD Concept: fundies:NetIncome Period: 2009-01-01 to 2009-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3ANetIncome&period=2009-12-31&surface=latest&period_type=duration&start=2009-01-01&unit=USD&dimensions= Input fundies:NetIncome: 111000000 USD (2009-01-01 to 2009-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#27229 The citation records this snapshot. The page link may show a newer release later.	USD 657.1 million Exact value Exact value: 657100000 USD 2009-01-01 – 2009-12-31: 657100000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2009-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 657100000 USD Concept: fundies:OperatingCashFlow Period: 2009-01-01 to 2009-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2009-12-31&surface=latest&period_type=duration&start=2009-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 657100000 USD (2009-01-01 to 2009-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#28985 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.
2010 2010-01-01 – 2010-12-31	USD 287.6 million Exact value Exact value: 287600000 USD 2010-01-01 – 2010-12-31: 287600000 USD Inspect Net Income Open source Share or cite Citation for Net Income · INTERSTATE POWER & LIGHT CO · 2010-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Net Income: 287600000 USD Concept: fundies:NetIncome Period: 2010-01-01 to 2010-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3ANetIncome&period=2010-12-31&surface=latest&period_type=duration&start=2010-01-01&unit=USD&dimensions= Input fundies:NetIncome: 287600000 USD (2010-01-01 to 2010-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#27229 The citation records this snapshot. The page link may show a newer release later.	USD 984.9 million Exact value Exact value: 984900000 USD 2010-01-01 – 2010-12-31: 984900000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · INTERSTATE POWER & LIGHT CO · 2010-12-31 INTERSTATE POWER & LIGHT CO (edgar:52485) Operating Cash Flow: 984900000 USD Concept: fundies:OperatingCashFlow Period: 2010-01-01 to 2010-12-31 Values: Latest reported Published: 2026-11-02T13:55:51Z Snapshot: 664eb488088846af3c4ae9d837b8ff6bbb920bd41dfdbba6e259c1648b259992 Dimensions: Consolidated View: https://fundies.io/companies/edgar/52485/explain?concept=fundies%3AOperatingCashFlow&period=2010-12-31&surface=latest&period_type=duration&start=2010-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 984900000 USD (2010-01-01 to 2010-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/352541/0001193125-11-049662.txt#28985 The citation records this snapshot. The page link may show a newer release later.	Unavailable Not reported for this period.	Unavailable Free cash flow cannot be calculated because Capital expenditure is unavailable for this period.

Capital expenditure uses the canonical mapped positive-spending convention. A missing, ambiguous, incompatible, or negative-sign input is left blank. Values use the latest reported version.

Dataset coverage and company identifiers

Coverage reflects filings processed into this Fundies dataset; it does not imply every source filing is loaded.

141 filings · 0 latest values · 0 originally reported values

Dataset published 2026-11-02. Source filing dates and reporting periods are shown separately.

Identifiers: 0000052485, 52485, edgar:52485

Also known as IES UTILITIES INC

INTERSTATE POWER & LIGHT CO

Latest quarter

Revenue

Operating margin

Operating cash flow

Trailing twelve months

Revenue

Net income

Operating cash flow

Company performance

What changed year over year

Revenue

Net income

Operating cash flow

Where revenue goes

2010 2010-01-01 – 2010-12-31

Cash

Share of revenue by period

Growth

Profit and cash

Balance sheet

Cash generation