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ClearSign Technologies Corp

CLIR Clue Score69
United States Fiscal year ends December CIK 0001434524
$3.21 +3.22% Close, 9 Oct 2026
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Price $3.21 +85.55% Close, 9 Oct 2026

Closing prices at the end of each trading day, from 12 Oct 2016. Not a live quote. Adjusted for share splits, so the line has no step at a split; dividends are not added back.

Revenue and profit

What the business sells, and what is left of it. Point at a year for the detail.
RevenueOperating incomeNet income
Fiscal year 2016Revenue0.6Operating income−11.2Net income−11.2Fiscal year 2017Revenue0.5 −13.0%Operating income−9.7Net income−9.7Fiscal year 2018Revenue0.5 −1.9%Operating income−9.6Net income−9.5Fiscal year 2019Revenue0.0 −100.0%Operating income−8.6Net income−8.5Fiscal year 2020Revenue0.0Operating income−6.9Net income−6.9Fiscal year 2021Revenue0.6Operating income−8.1Net income−7.9EPS, diluted−0.25Fiscal year 2022Revenue0.4 −38.4%Operating income−6.1Net income−5.8EPS, diluted−0.16Fiscal year 2023Revenue2.4 +542.5%Operating income−6.0Net income−5.2EPS, diluted−0.13Fiscal year 2024Revenue3.6 +49.6%Operating income−6.5Net income−5.3EPS, diluted−1.08Fiscal year 2025Revenue5.2 +45.6%Operating income−6.7Net income−5.5EPS, diluted−0.99
FY2016FY2017FY2018FY2019FY2020FY2021FY2022FY2023FY2024FY2025
Revenue 0.6 0.5 0.5 0.0 0.0 0.6 0.4 2.4 3.6 5.2
Growth −13.0% −1.9% −100.0% −38.4% +542.5% +49.6% +45.6%
Operating income −11.2 −9.7 −9.6 −8.6 −6.9 −8.1 −6.1 −6.0 −6.5 −6.7
Net income −11.2 −9.7 −9.5 −8.5 −6.9 −7.9 −5.8 −5.2 −5.3 −5.5
Growth
EPS, diluted n/a n/a n/a n/a n/a −0.25 −0.16 −0.13 −1.08 −0.99

Margins

How much of each dollar of revenue it keeps. Point at a year for the detail.
Gross marginOperating marginNet margin
Fiscal year 2016Gross margin21.9%Operating margin−1,804.3%Net margin−1,799.2%Free cash flow margin−1,418.5%Fiscal year 2017Gross margin29.6%Operating margin−1,798.5%Net margin−1,792.6%Free cash flow margin−1,546.7%Fiscal year 2018Gross margin19.4%Operating margin−1,805.8%Net margin−1,792.5%Free cash flow margin−1,599.6%Fiscal year 2019Fiscal year 2020Fiscal year 2021Gross margin−74.5%Operating margin−1,341.8%Net margin−1,300.0%Free cash flow margin−1,117.0%Fiscal year 2022Gross margin31.0%Operating margin−1,635.6%Net margin−1,539.6%Free cash flow margin−1,337.4%Fiscal year 2023Gross margin34.0%Operating margin−248.9%Net margin−216.1%Fiscal year 2024Gross margin31.1%Operating margin−180.4%Net margin−147.4%Free cash flow margin−122.7%Fiscal year 2025Gross margin27.2%Operating margin−127.5%Net margin−105.0%Free cash flow margin−90.6%
FY2016FY2017FY2018FY2019FY2020FY2021FY2022FY2023FY2024FY2025
Gross margin 21.9% 29.6% 19.4% n/a n/a −74.5% 31.0% 34.0% 31.1% 27.2%
Operating margin −1,804.3% −1,798.5% −1,805.8% n/a n/a −1,341.8% −1,635.6% −248.9% −180.4% −127.5%
Net margin −1,799.2% −1,792.6% −1,792.5% n/a n/a −1,300.0% −1,539.6% −216.1% −147.4% −105.0%
Free cash flow margin −1,418.5% −1,546.7% −1,599.6% n/a n/a −1,117.0% −1,337.4% n/a −122.7% −90.6%

Cash flow

The cash the business makes, what it reinvests, and what it hands back. Point at a year for the detail.
Operating cash flowCapital expenditureFree cash flow
Fiscal year 2016Operating cash flow−8.7Capital expenditure−0.1Free cash flow−8.8Fiscal year 2017Operating cash flow−8.3Capital expenditure−0.1Free cash flow−8.4Fiscal year 2018Operating cash flow−8.4Capital expenditure−0.1Free cash flow−8.5Fiscal year 2019Operating cash flow−6.9Capital expenditure−0.0Free cash flow−6.9Fiscal year 2020Operating cash flow−6.0Capital expenditure−0.0Free cash flow−6.0Fiscal year 2021Operating cash flow−6.7Capital expenditure−0.1Free cash flow−6.8Fiscal year 2022Operating cash flow−5.0Capital expenditure−0.0Free cash flow−5.0Fiscal year 2023Operating cash flow−3.2Fiscal year 2024Operating cash flow−4.4Capital expenditure−0.0Free cash flow−4.4Fiscal year 2025Operating cash flow−4.7Capital expenditure−0.0Free cash flow−4.7
FY2016FY2017FY2018FY2019FY2020FY2021FY2022FY2023FY2024FY2025
Operating cash flow −8.7 −8.3 −8.4 −6.9 −6.0 −6.7 −5.0 −3.2 −4.4 −4.7
Capital expenditure −0.1 −0.1 −0.1 −0.0 −0.0 −0.1 −0.0 n/a −0.0 −0.0
Free cash flow −8.8 −8.4 −8.5 −6.9 −6.0 −6.8 −5.0 n/a −4.4 −4.7
Growth

Balance sheet

What it holds against what it owes, at each year end. Point at a year for the detail.
CashTotal debt
Fiscal year 2016Cash1.3Shareholders’ equity2.2Fiscal year 2017Cash1.2Shareholders’ equity2.4Fiscal year 2018Cash8.9Shareholders’ equity16.9Fiscal year 2019Cash8.6Total debt0.0Net cash (debt)8.6Shareholders’ equity9.2Debt to equity0.00Fiscal year 2020Cash8.8Total debt0.3Net cash (debt)8.6Shareholders’ equity9.5Debt to equity0.03Fiscal year 2021Cash7.6Shareholders’ equity8.3Fiscal year 2022Cash6.5Shareholders’ equity9.6Fiscal year 2023Cash5.7Shareholders’ equity5.2Fiscal year 2024Cash14.0Shareholders’ equity13.8Fiscal year 2025Cash9.2Shareholders’ equity9.5
FY2016FY2017FY2018FY2019FY2020FY2021FY2022FY2023FY2024FY2025
Cash 1.3 1.2 8.9 8.6 8.8 7.6 6.5 5.7 14.0 9.2
Total debt n/a n/a n/a 0.0 0.3 n/a n/a n/a n/a n/a
Net cash (debt) n/a n/a n/a 8.6 8.6 n/a n/a n/a n/a n/a
Shareholders’ equity 2.2 2.4 16.9 9.2 9.5 8.3 9.6 5.2 13.8 9.5
Debt to equity n/a n/a n/a 0.00 0.03 n/a n/a n/a n/a n/a

In millions of USD, except per-share figures and ratios. Fiscal years, as last filed with the SEC.

Financial statements FY2025 · 10-K

Income statement

In millions of USD, except per-share figures; shares in millions. Fiscal years ending December, each column as last filed with the SEC.
Click a line to chart it
Fiscal year FY2016 31 Dec 2016 FY2017† 31 Dec 2017 FY2018 31 Dec 2018 FY2019† 31 Dec 2019 FY2020 31 Dec 2020 FY2021† 31 Dec 2021 FY2022 31 Dec 2022 FY2023 31 Dec 2023 FY2024† 31 Dec 2024 FY2025 31 Dec 2025
Revenue and profit
0.6 0.5 0.5 0.0 0.0 0.6 0.4 2.4 3.6 5.2
Growth −13.0% −1.9% −100.0% −38.4% +542.5% +49.6% +45.6%
0.5 0.4 0.4 0.0 0.3 1.1 0.3 1.6 2.5 3.8
0.1 0.2 0.1 −0.0 −0.3 −0.5 0.1 0.8 1.1 1.4
Growth +17.6% −35.6% −101.0% +604.3% +36.8% +27.4%
4.8 4.7 4.1 3.1 2.0 2.7 0.5 0.7 1.5 1.4
6.5 5.2 5.6 5.5 4.6 5.0 5.7 6.1 6.1 6.7
−11.2 −9.7 −9.6 −8.6 −6.9 −8.1 −6.1 −6.0 −6.5 −6.7
Growth
n/a n/a n/a n/a n/a −7.9 −5.8 −5.2 −5.3 −5.5
n/a n/a n/a n/a n/a 0.0 0.0 0.0 0.0 0.0
−11.2 −9.7 −9.5 −8.5 −6.9 −7.9 −5.8 −5.2 −5.3 −5.5
Growth
Per share
n/a n/a n/a n/a n/a −0.25 −0.16 −0.13 −1.08 −0.99
n/a n/a n/a n/a n/a −0.25 −0.16 −0.13 −1.08 −0.99
Growth
n/a n/a n/a n/a n/a 31.2 35.3 38.5 4.9 5.6
1.3 3.5 3.4 2.2 2.8 31.2 35.3 38.5 4.9 5.6
Growth +162.7% −3.3% −34.5% +25.6% +1,024.6% +13.2% +8.9% −87.3% +13.4%

† The diluted share count jumps at 2017 and 2019 and 2021 and 2024, so per-share figures either side of that column are not comparable. Usually a split, but the break lands on the restatement boundary rather than on the split date, because every column is that period’s latest filing.

Five years in brief

Worked out from the figures above, not from a press release
  • A net loss in 10 of 10 years on file.