ClearSign Technologies Corporation (CLIR)

Nasdaq: CLIR · Industrial Instruments For Measurement, Display, and Control · Tulsa, OK · filing with the SEC since 2008

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Grade3.8

◀ Past 2.0● Present 3.5▶ Future 6.1

1 est.

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Income statement, as filed

In thousands of US dollars (USD), as filed; per-share figures in US dollars; share counts. The fiscal year ends in December.

Income statement, by fiscal year, newest first
Fiscal year	FY 2025	FY 2024	FY 2023	FY 2022	FY 2021	FY 2020	FY 2019	FY 2018	FY 2017	FY 2016
Period ending	Dec 31, 2025	Dec 31, 2024	Dec 31, 2023	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018	Dec 31, 2017	Dec 31, 2016
Report filed	Mar 31, 2026	Mar 31, 2025	Apr 1, 2024	Mar 31, 2023	Mar 31, 2022	Mar 31, 2021	Mar 30, 2020	Mar 12, 2019	Mar 27, 2018	Feb 14, 2017
Revenue	5,234	3,596	2,403	374	607	0	0	530	540	621
For lenders
Net interest income	·	·	324	83	1	·	·	·	·	·
Cost of revenue	3,810	2,478	1,586	258	1,059	279	1	427	380	485
Gross profit	1,424	1,118	817	116	-452	-279	-1	103	160	136
Research and development	1,422	1,471	739	505	2,680	2,029	3,056	4,052	4,712	4,831
General and administrative	6,673	6,135	6,059	5,728	5,013	4,624	5,526	5,622	5,160	6,510
Total operating expenses	8,095	7,606	6,798	6,233	7,693	6,653	8,582	9,674	9,872	11,341
Operating income	-6,671	-6,488	-5,981	-6,117	-8,145	-6,932	-8,583	-9,571	-9,712	-11,205
Interest and investment income	·	·	·	·	1	2	101	71	32	32
Interest income (expense), net	439	516	324	·	·	·	·	·	·	·
Other income (expense), net	·	9	208^r	6	1	·	·	·	·	·
Total non-operating income (expense)	1,175	1,189	787	359	253	·	·	·	·	·
Income before income taxes	-5,453	-5,299	-5,194	-5,758	-7,886	·	·	·	·	·
Income tax expense	0	0	0	0	0	·	·	·	·	·
Net income including non-controlling interests	-5,496	-5,299	-5,194	-5,758	-7,892	-6,886	-8,482	-9,500	·	·
Net income to non-controlling interests	·	·	·	·	-1	-2	-3	·	·	·
Net income	-5,496	-5,299	-5,194	-5,758	-7,891	-6,884	-8,479	-9,500	-9,680	-11,173
Earnings per share, basic	-0.99	-1.08^r	-1.30^b	-1.60^b	-2.50^b	·	·	·	·	·
Earnings per share, diluted	-0.99	-1.08^r	-1.30^b	-1.60^b	-2.50^b	·	·	·	·	·
Earnings per share, basic and diluted	·	·	·	·	-2.50^b	-2.50^rb	3.20^b	4.20^b	6.30^rb	-8.60^b
Weighted average shares, basic	5,551,194	4,893,599^r	3,850,093^b	3,533,871^b	3,123,081^b	·	·	·	·	·
Weighted average shares, diluted	5,551,194	4,893,599^r	3,850,093^b	3,533,871^b	3,123,081^b	2,777,119	2,211,058	3,376,061	3,489,644	1,328,128
Weighted average shares, basic and diluted	·	·	·	·	3,123,081^b	2,783,710^b	2,670,104^b	2,285,621^b	1,542,110^b	1,292,872^b

As filed with the SEC, each figure from the newest report that carries it, and linked to it. Nothing here is computed.Share counts and per-share figures are on the newest report's basis, after the 1-for-10 reverse split of Mar 2026.A dot is a line not tagged for that period. ^r restated by the company in a later report; ^b a share figure put on the newest basis or filed in the wrong unit. Hover a figure for its filing and note.

What each line is, and the XBRL concept behind it

Revenue what customers paid for what it sold

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:Revenues

Net interest income interest earned less interest paidus-gaap:InterestIncomeExpenseNet

Cost of revenue what it cost to make or buy what it sold

us-gaap:CostOfRevenue
us-gaap:CostOfGoodsAndServicesSold

Gross profit revenue less the cost of what it soldus-gaap:GrossProfit

Research and development spent on inventing what it sells nextus-gaap:ResearchAndDevelopmentExpense

General and administrative the cost of running the company itselfus-gaap:GeneralAndAdministrativeExpense

Total operating expenses the running costs togetherus-gaap:OperatingExpenses

Operating income profit from running the business, before interest and taxus-gaap:OperatingIncomeLoss

Interest and investment income what its cash and investments earnedus-gaap:InvestmentIncomeInterest

Interest income (expense), net interest earned less interest paid, outside the businessus-gaap:InterestIncomeExpenseNonoperatingNet

Other income (expense), net gains and costs outside the businessus-gaap:OtherNonoperatingIncomeExpense

Total non-operating income (expense) everything outside the business, togetherus-gaap:NonoperatingIncomeExpense

Income before income taxes profit before taxus-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

Income tax expense tax charged on the period's profitus-gaap:IncomeTaxExpenseBenefit

Net income including non-controlling interests the whole group's profit, minority holders' share includedus-gaap:ProfitLoss

Net income to non-controlling interests the share that belongs to minority holdersus-gaap:NetIncomeLossAttributableToNoncontrollingInterest

Net income the profit or loss that belongs to the company's shareholdersus-gaap:NetIncomeLoss

Earnings per share, basic net income per share outstandingus-gaap:EarningsPerShareBasic

Earnings per share, diluted net income per share, counting every share that could be issuedus-gaap:EarningsPerShareDiluted

Earnings per share, basic and diluted net income per share, where both counts are the sameus-gaap:EarningsPerShareBasicAndDiluted

Weighted average shares, basic the average count of shares outstandingus-gaap:WeightedAverageNumberOfSharesOutstandingBasic

Weighted average shares, diluted the average count with every share that could be issuedus-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

Weighted average shares, basic and diluted the average count, where both counts are the sameus-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

SI Assistanton CLIR · research, not advice