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CLEARSIGN COMBUSTION CORP

EDGAR

CLIR Quarterly report (10-Q) · filed 2026-08-14

140 filing records in this dataset, filed from 2011-11-14 to 2026-08-14. Reported financial figures are available; chart coverage varies by period.

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Watchlist

Latest quarter

Revenue

0 Unit1

2019 Q2 · Unit1

Exact inputs and evidence

Revenue: 0 Unit1 Source

Cash and cash equivalents: 9.89 million Unit_Standard_USD_OmUcZYaWikKVdAXDewsndg 2026-06-30 Source
Exact value

9889000 Unit_Standard_USD_OmUcZYaWikKVdAXDewsndg
Long-term debt including current maturities: Not available
Shares outstanding: 6.31 million Unit_Standard_shares_9G5ak7ysqUONdDOMfITWBA 2026-06-30 Source
Exact value

6307455 Unit_Standard_shares_9G5ak7ysqUONdDOMfITWBA

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

Latest filing recorded: 2026-08-14.

Financial data available through: 2025-12-31.

Coverage by financial measure

Revenue: 4 of 11 periods available· newest 2018-12-31
Operating income: 2 of 11 periods available· newest 2025-12-31
Net income: 2 of 11 periods available· newest 2025-12-31
Operating cash flow: 2 of 11 periods available· newest 2025-12-31
Capital expenditure: 2 of 11 periods available· newest 2025-12-31
Total assets: Multiple units; comparison withheld· newest 2025-12-31
Total liabilities: Multiple units; comparison withheld· newest 2025-12-31
Current assets: Multiple units; comparison withheld· newest 2025-12-31
Current liabilities: Multiple units; comparison withheld· newest 2025-12-31
Cash and cash equivalents: Multiple units; comparison withheld· newest 2025-12-31
long term debt: No compatible figures in this window
Shares outstanding: Multiple units; comparison withheld· newest 2025-12-31

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.

Net income
−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 197,000

Prior period

−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 5.3 million

2024-01-01 – 2024-12-31
Current period

−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 5.5 million

2025-01-01 – 2025-12-31

Exact inputs and evidence

-5496000 − -5299000 = -197000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw

-5299000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · 2024-01-01 – 2024-12-31
Inspect prior input Prior source
-5496000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · 2025-01-01 – 2025-12-31
Inspect current input Current source

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Citation for Year-over-year change in Net income · CLEARSIGN COMBUSTION CORP · 2025-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Year-over-year change in Net income: -197000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:NetIncome Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:NetIncome: -5496000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#764258 Filing: 000110465926037699 Input fundies:NetIncome: -5299000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#765324 Filing: 000110465926037699
The citation records this snapshot. The page link may show a newer release later.
Operating cash flow
−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 363,000

Prior period

−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 4.37 million

2024-01-01 – 2024-12-31
Current period

−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 4.74 million

2025-01-01 – 2025-12-31

Exact inputs and evidence

-4736000 − -4373000 = -363000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw

-4373000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · 2024-01-01 – 2024-12-31
Inspect prior input Prior source
-4736000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · 2025-01-01 – 2025-12-31
Inspect current input Current source

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Citation for Year-over-year change in Operating cash flow · CLEARSIGN COMBUSTION CORP · 2025-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Year-over-year change in Operating cash flow: -363000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:OperatingCashFlow Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:OperatingCashFlow: -4736000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1033161 Filing: 000110465926037699 Input fundies:OperatingCashFlow: -4373000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1034259 Filing: 000110465926037699
The citation records this snapshot. The page link may show a newer release later.
Capital expenditure
-89.7%

Prior period

Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 39,000

2024-01-01 – 2024-12-31
Current period

Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 4,000

2025-01-01 – 2025-12-31

Exact inputs and evidence

4000 − 39000 = -35000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw

39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · 2024-01-01 – 2024-12-31
Inspect prior input Prior source
4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · 2025-01-01 – 2025-12-31
Inspect current input Current source

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Citation for Year-over-year change in Capital expenditure · CLEARSIGN COMBUSTION CORP · 2025-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Year-over-year change in Capital expenditure: -35000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:CapitalExpenditure Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:CapitalExpenditure: 4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1038926 Filing: 000110465926037699 Input fundies:CapitalExpenditure: 39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1039890 Filing: 000110465926037699
The citation records this snapshot. The page link may show a newer release later.

Comparable inputs unavailable for: Revenue.

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.

2018 2018-01-01 – 2018-12-31

Revenue USD 530,000 100% of revenue
Operating costs Derived Unavailable An input is unavailable.
Operating income Unavailable An input is unavailable.
Tax, interest and other Derived Unavailable An input is unavailable.
Net income Unavailable An input is unavailable.

Cash

Operating cash flow Unavailable An input is unavailable.
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

2015 Not shown: operating income or net income is not reported.
2016 Not shown: operating income or net income is not reported.
2017 Not shown: operating income or net income is not reported.
2018 Not shown: operating income or net income is not reported.

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
2015 2015-01-01 – 2015-12-31	61000	Unavailable	Unavailable	Unavailable	Unavailable	Unavailable	Source 2015-01-01 – 2015-12-31: 61000 USD Inspect Revenue Open source
2016 2016-01-01 – 2016-12-31	621000	Unavailable	Unavailable	Unavailable	Unavailable	Unavailable	Source 2016-01-01 – 2016-12-31: 621000 USD Inspect Revenue Open source
2017 2017-01-01 – 2017-12-31	540000	Unavailable	Unavailable	Unavailable	Unavailable	Unavailable	Source 2017-01-01 – 2017-12-31: 540000 USD Inspect Revenue Open source
2018 2018-01-01 – 2018-12-31	530000	Unavailable	Unavailable	Unavailable	Unavailable	Unavailable	Source 2018-01-01 – 2018-12-31: 530000 USD Inspect Revenue 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 530K 2018

Values and sources

Revenue values and source evidence
Period	Series	Value(USD)	Source evidence
20152015-12-31	Revenue	61000	Revenue: 61000 Open source
20162016-12-31	Revenue	621000	Revenue: 621000 Open source
20172017-12-31	Revenue	540000	Revenue: 540000 Open source
20182018-12-31	Revenue	530000	Revenue: 530000 Open source

Revenue growth

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

-1.9% 2018

Values and sources

Revenue growth values and source evidence
Period	Series	Value	Source evidence
20152015-12-31	Year over year	No prior comparable period	Revenue: 61000 Open source
20162016-12-31	Year over year	918%	Revenue: 621000 Open source Revenue: 61000 Open source
20172017-12-31	Year over year	-13%	Revenue: 540000 Open source Revenue: 621000 Open source
20182018-12-31	Year over year	-1.9%	Revenue: 530000 Open source Revenue: 540000 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.

Not enough comparable data to show this history.

Operating margin
Net margin
Free cash flow margin

Values and sources

Profit margins values and source evidence
Period	Series	Value	Source evidence
2015-12-31	Operating margin	Not reported	Revenue: 61000 Open source
2016-12-31	Operating margin	Not reported	Revenue: 621000 Open source
2017-12-31	Operating margin	Not reported	Revenue: 540000 Open source
2018-12-31	Operating margin	Not reported	Revenue: 530000 Open source
2015-12-31	Net margin	Not reported	Revenue: 61000 Open source
2016-12-31	Net margin	Not reported	Revenue: 621000 Open source
2017-12-31	Net margin	Not reported	Revenue: 540000 Open source
2018-12-31	Net margin	Not reported	Revenue: 530000 Open source
20152015-12-31	Free cash flow margin	Not reported	Revenue: 61000 Open source
20162016-12-31	Free cash flow margin	Not reported	Revenue: 621000 Open source
20172017-12-31	Free cash flow margin	Not reported	Revenue: 540000 Open source
20182018-12-31	Free cash flow margin	Not reported	Revenue: 530000 Open source

Operating cash flow

Cash generated by the company’s normal business operations.

Not enough comparable data to show this history.

Values and sources

Operating cash flow values and source evidence
Period	Series	Value(USD)	Source evidence
20152015-12-31	Operating cash flow	Not reported	No source recorded
20162016-12-31	Operating cash flow	Not reported	No source recorded
20172017-12-31	Operating cash flow	Not reported	No source recorded
20182018-12-31	Operating cash flow	Not reported	No source recorded

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	Source evidence
20152015-12-31	Free cash flow	Unavailable	No source recorded
20162016-12-31	Free cash flow	Unavailable	No source recorded
20172017-12-31	Free cash flow	Unavailable	No source recorded
20182018-12-31	Free cash flow	Unavailable	No source recorded

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
2015-12-31	Liabilities / assets	Not reported	No source recorded
2016-12-31	Liabilities / assets	Not reported	No source recorded
2017-12-31	Liabilities / assets	Not reported	No source recorded
2018-12-31	Liabilities / assets	Not reported	No source recorded

Current assets to current liabilities

Current assets divided by current liabilities.

Not enough comparable data to show this history.

Values and sources

Current assets to current liabilities values and source evidence
Period	Series	Value	Source evidence
2015-12-31	Current assets / current liabilities	Not reported	No source recorded
2016-12-31	Current assets / current liabilities	Not reported	No source recorded
2017-12-31	Current assets / current liabilities	Not reported	No source recorded
2018-12-31	Current assets / current liabilities	Not reported	No source recorded

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
2024 2024-01-01 – 2024-12-31	−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 5.3 million Exact value Exact value: -5299000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 2024-01-01 – 2024-12-31: -5299000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Inspect Net Income Open source Share or cite Citation for Net Income · CLEARSIGN COMBUSTION CORP · 2024-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Net Income: -5299000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:NetIncome Period: 2024-01-01 to 2024-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524/explain?concept=fundies%3ANetIncome&period=2024-12-31&surface=latest&period_type=duration&start=2024-01-01&unit=Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw&dimensions= Input fundies:NetIncome: -5299000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#765324 Filing: 000110465926037699 The citation records this snapshot. The page link may show a newer release later.	−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 4.37 million Exact value Exact value: -4373000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 2024-01-01 – 2024-12-31: -4373000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CLEARSIGN COMBUSTION CORP · 2024-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Operating Cash Flow: -4373000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:OperatingCashFlow Period: 2024-01-01 to 2024-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524/explain?concept=fundies%3AOperatingCashFlow&period=2024-12-31&surface=latest&period_type=duration&start=2024-01-01&unit=Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw&dimensions= Input fundies:OperatingCashFlow: -4373000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1034259 Filing: 000110465926037699 The citation records this snapshot. The page link may show a newer release later.	Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 39,000 Exact value Exact value: 39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 2024-01-01 – 2024-12-31: 39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CLEARSIGN COMBUSTION CORP · 2024-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Capital Expenditure: 39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:CapitalExpenditure Period: 2024-01-01 to 2024-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524/explain?concept=fundies%3ACapitalExpenditure&period=2024-12-31&surface=latest&period_type=duration&start=2024-01-01&unit=Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw&dimensions= Input fundies:CapitalExpenditure: 39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1039890 Filing: 000110465926037699 The citation records this snapshot. The page link may show a newer release later.	−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 4.41 million Calculation and evidence -4373000 − 39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Exact free cash flow: -4412000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 2024-01-01 – 2024-12-31: -4373000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · Inspect Operating Cash Flow · Source 2024-01-01 – 2024-12-31: 39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CLEARSIGN COMBUSTION CORP · 2024-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Free cash flow: -4412000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: free-cash-flow Period: 2024-01-01 to 2024-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: -4373000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1034259 Filing: 000110465926037699 Input fundies:CapitalExpenditure: 39000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1039890 Filing: 000110465926037699 The citation records this snapshot. The page link may show a newer release later.
2025 2025-01-01 – 2025-12-31	−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 5.5 million Exact value Exact value: -5496000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 2025-01-01 – 2025-12-31: -5496000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Inspect Net Income Open source Share or cite Citation for Net Income · CLEARSIGN COMBUSTION CORP · 2025-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Net Income: -5496000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:NetIncome Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524/explain?concept=fundies%3ANetIncome&period=2025-12-31&surface=latest&period_type=duration&start=2025-01-01&unit=Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw&dimensions= Input fundies:NetIncome: -5496000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#764258 Filing: 000110465926037699 The citation records this snapshot. The page link may show a newer release later.	−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 4.74 million Exact value Exact value: -4736000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 2025-01-01 – 2025-12-31: -4736000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CLEARSIGN COMBUSTION CORP · 2025-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Operating Cash Flow: -4736000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:OperatingCashFlow Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524/explain?concept=fundies%3AOperatingCashFlow&period=2025-12-31&surface=latest&period_type=duration&start=2025-01-01&unit=Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw&dimensions= Input fundies:OperatingCashFlow: -4736000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1033161 Filing: 000110465926037699 The citation records this snapshot. The page link may show a newer release later.	Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 4,000 Exact value Exact value: 4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 2025-01-01 – 2025-12-31: 4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CLEARSIGN COMBUSTION CORP · 2025-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Capital Expenditure: 4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: fundies:CapitalExpenditure Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524/explain?concept=fundies%3ACapitalExpenditure&period=2025-12-31&surface=latest&period_type=duration&start=2025-01-01&unit=Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw&dimensions= Input fundies:CapitalExpenditure: 4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1038926 Filing: 000110465926037699 The citation records this snapshot. The page link may show a newer release later.	−Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 4.74 million Calculation and evidence -4736000 − 4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Exact free cash flow: -4740000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw 2025-01-01 – 2025-12-31: -4736000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · Inspect Operating Cash Flow · Source 2025-01-01 – 2025-12-31: 4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CLEARSIGN COMBUSTION CORP · 2025-12-31 CLEARSIGN COMBUSTION CORP (edgar:1434524) Free cash flow: -4740000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw Concept: free-cash-flow Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T13:23:05Z Snapshot: b9858cf0df22462cb351917b8b83cba2debd2097cfdffe9127068192c6fd33df Dimensions: Consolidated View: https://fundies.io/companies/edgar/1434524?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: -4736000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1033161 Filing: 000110465926037699 Input fundies:CapitalExpenditure: 4000 Unit_Standard_USD_JKjUayb-SkG02P6enh1uNw (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1434524/000110465926037699/clir-20251231x10k.htm#1038926 Filing: 000110465926037699 The citation records this snapshot. The page link may show a newer release later.

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.

140 filings · 5,186 latest values · 5,186 originally reported values

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

Identifiers: 0001434524, 1434524, CLIR, clir, edgar:1434524

Also known as CLEARSIGN COMBUSTION CORP, CLEARSIGN TECHNOLOGIES CORP, CLEARSIGN TECHNOLOGIES CORPORATION, ClearSign Technologies Corp

CLEARSIGN COMBUSTION CORP

Latest quarter

Revenue

Company performance

What changed year over year

Net income

Operating cash flow

Capital expenditure

Where revenue goes

2018 2018-01-01 – 2018-12-31

Cash

Share of revenue by period

Growth

Profit and cash

Balance sheet

Cash generation