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CLIR · NASDAQ

ClearSign Technologies (CLIR) Stock Price & Fundamentals

$395.19−1.29%−$5.15End-of-day price as of Oct 9, 2026

ClearSign Technologies (CLIR) closed at $395.19 on Oct 9, 2026, down 1.29% from the previous close of $400.34.

Share price, past year

1Y −5.43%

52-week range $354.91 – $436.49. Daily closing prices.
Monthly closing prices
Last closing price of each month
DateClose
Oct 9, 2026$395.19
Sep 30, 2026$408.29
Aug 31, 2026$364.98
Jul 31, 2026$377.78
Jun 30, 2026$374.30
May 29, 2026$364.99
Apr 30, 2026$369.05
Mar 31, 2026$388.87
Feb 27, 2026$388.26
Jan 30, 2026$398.53
Dec 31, 2025$418.95
Nov 28, 2025$431.11
Oct 31, 2025$425.89

Key statistics

Market cap
$2.49B
P/E (TTM)
—
EPS (TTM)
−$0.93
Revenue (TTM)
$5.45M
Net income (TTM)
−$5.24M
Shares outstanding
6.3M
Dividend yield
—
52-week range
$354.91 – $436.49

ClearSign Technologies's market cap is $2.49B, based on a share price of $395.19 and 6.3M shares outstanding as of Jun 30, 2026.

Financials

ClearSign Technologies reported revenue of $5.23M for fiscal 2025, up 45.55% from fiscal 2024.

ClearSign Technologies reported a net loss of $5.50M in fiscal 2025.

Fiscal 2025 revenue was the highest in the 10 years shown.

Annual revenue

FY16FY17FY18FY19FY20FY21FY22FY23FY24FY25
Annual revenue by fiscal year; the table below lists the values.
ClearSign Technologies annual financials by fiscal year, from SEC filings
Fiscal yearRevenueGrowthNet incomeNet marginEPS (diluted)Free cash flow
FY2025ended Dec 31, 2025$5.23M+45.6%−$5.50M−105.0%−$0.99−$4.74M
FY2024ended Dec 31, 2024$3.60M+49.7%−$5.30M−147.4%−$1.08−$4.41M
FY2023ended Dec 31, 2023$2.40M+542.5%−$5.19M−216.2%−$1.30—
FY2022ended Dec 31, 2022$374.00K−38.4%−$5.76M−1,539.6%−$1.60−$5.00M
FY2021ended Dec 31, 2021$607.00K—−$7.89M−1,300.0%−$2.50−$6.78M
FY2020ended Dec 31, 2020$0.00—−$6.88M—−$2.50−$5.98M
FY2019ended Dec 31, 2019$0.00−100.0%−$8.48M—$3.20−$6.92M
FY2018ended Dec 31, 2018$530.00K−1.9%−$9.50M−1,792.5%$4.20−$8.48M
FY2017ended Dec 31, 2017$540.00K−13.0%−$9.68M−1,792.6%$6.30−$8.35M
FY2016ended Dec 31, 2016$621.00K—−$11.17M−1,799.2%−$8.60−$8.81M
ClearSign Technologies quarterly results
QuarterRevenueNet incomeEPS (diluted)
Q2 FY2026ended Jun 30, 2026$560.00K−$1.31M−$0.22
Q1 FY2026ended Mar 31, 2026$191.00K−$2.19M−$0.39
Q4 FY2025ended Dec 31, 2025$3.67M−$311.00K−$0.06
Q3 FY2025ended Sep 30, 2025$1.03M−$1.43M−$0.26
Q2 FY2025ended Jun 30, 2025$133.00K−$1.68M−$0.30
Q1 FY2025ended Mar 31, 2025$401.00K−$2.08M−$0.38
Q4 FY2024ended Dec 31, 2024$590.00K−$1.16M−$0.25
Q3 FY2024ended Sep 30, 2024$1.86M−$1.16M−$0.20

Company profile

Name
ClearSign Technologies Corp
Ticker
CLIR
Exchange
NASDAQ
Industry (SEC SIC)
Industrial Instruments For Measurement, Display, and Control
Headquarters
8023 E. 63rd Place, Suite 101, Tulsa, OK 74133
Incorporated in
DE
Fiscal year ends
December
SEC CIK
0001434524

Recent SEC filings

Frequently asked questions

What is ClearSign Technologies's stock price?

ClearSign Technologies (CLIR) closed at $395.19 on Oct 9, 2026, down 1.29% from the previous close of $400.34.

What is ClearSign Technologies's market cap?

ClearSign Technologies's market cap is $2.49B, based on a share price of $395.19 and 6.3M shares outstanding as of Jun 30, 2026.

How much revenue does ClearSign Technologies make?

ClearSign Technologies reported revenue of $5.23M for fiscal 2025, up 45.55% from fiscal 2024.

Does ClearSign Technologies pay a dividend?

ClearSign Technologies's recent filings report no dividends declared over the last four quarters.

Sources and methodology

Fundamentals come from ClearSign Technologies Corp's filings with the SEC (EDGAR XBRL company facts). Fourth-quarter figures that companies don't report separately are calculated as the fiscal year minus the first three quarters. Trailing twelve-month (TTM) figures sum the latest four quarters. Prices are generated sample data for development. Last updated Oct 9, 2026. Data sources and disclosures