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ClearSign Technologies Corporation (CLIR)

ClearSign Technologies Corporation at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

ClearSign Technologies Corporation (CLIR) is a Industrial - Pollution & Treatment Controls company based in US with a market capitalization of $23.9M. Revenue grew 45.5% year-over-year and free cash flow was negative at -$4.8M. This page tracks CLIR's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

US · 18 employees · IPO Apr 25, 2012

Valuation

Valuation & price

$4.85 · as of May 23, 2026 · -54.2% vs 52w high

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P/E ratio

Latest-FY diluted EPS

2.50

P/B ratio

Market cap ÷ book equity

—

Dividend yield

Price — last 12 months

$10.60$7.06$3.52Jul 25Dec 25Jul 26Jul 7, 25$5.37Jul 9, 25$5.55Jul 11, 25$5.40Jul 15, 25$5.25Jul 17, 25$5.40Jul 21, 25$5.85Jul 23, 25$5.77Jul 25, 25$5.96Jul 29, 25$5.95Jul 31, 25$5.77Aug 4, 25$5.47Aug 6, 25$5.80Aug 11, 25$5.40Aug 13, 25$5.85Aug 15, 25$5.62Aug 19, 25$5.51Aug 21, 25$5.75Aug 25, 25$5.85Aug 27, 25$5.92Aug 29, 25$5.84Sep 3, 25$5.95Sep 5, 25$5.88Sep 9, 25$5.81Sep 11, 25$5.45Sep 16, 25$5.03Sep 18, 25$5.00Sep 22, 25$8.38Sep 24, 25$7.58Sep 26, 25$8.06Sep 30, 25$7.71Oct 2, 25$8.43Oct 6, 25$10.60Oct 8, 25$9.78Oct 10, 25$8.60Oct 14, 25$10.00Oct 16, 25$8.70Oct 21, 25$8.61Oct 23, 25$9.50Oct 27, 25$8.40Oct 29, 25$9.00Oct 31, 25$8.70Nov 4, 25$8.65Nov 6, 25$8.96Nov 10, 25$9.27Nov 12, 25$8.31Nov 14, 25$8.82Nov 18, 25$8.28Nov 20, 25$8.21Nov 25, 25$7.54Nov 28, 25$7.41Dec 2, 25$7.18Dec 4, 25$7.60Dec 8, 25$7.50Dec 10, 25$6.80Dec 12, 25$6.55Dec 16, 25$5.90Dec 18, 25$5.92Dec 22, 25$5.80Dec 24, 25$6.27Dec 29, 25$5.75Jan 2, 26$5.70Jan 6, 26$6.00Jan 8, 26$7.29Jan 12, 26$7.45Jan 14, 26$7.53Jan 16, 26$7.61Jan 21, 26$6.83Jan 23, 26$6.96Jan 27, 26$6.71Jan 29, 26$6.04Feb 2, 26$5.99Feb 4, 26$5.87Feb 9, 26$6.59Feb 11, 26$5.81Feb 13, 26$6.14Feb 18, 26$6.07Feb 20, 26$5.95Feb 24, 26$5.88Feb 26, 26$5.62Mar 2, 26$5.62Mar 4, 26$5.40Mar 6, 26$5.36Mar 10, 26$5.71Mar 12, 26$4.40Mar 17, 26$4.04Mar 19, 26$3.61Mar 23, 26$3.60Mar 25, 26$3.57Mar 27, 26$3.74Mar 31, 26$4.36Apr 2, 26$4.83Apr 7, 26$6.15Apr 9, 26$6.18Apr 13, 26$5.39Apr 15, 26$5.84Apr 17, 26$5.45Apr 22, 26$5.59Apr 24, 26$5.00Apr 28, 26$5.33Apr 30, 26$5.00May 4, 26$5.06May 6, 26$4.91May 8, 26$4.54May 12, 26$4.55May 14, 26$5.21May 18, 26$4.41May 20, 26$4.90May 22, 26$4.85May 28, 26$4.56Jun 1, 26$4.47Jun 3, 26$4.38Jun 5, 26$3.94Jun 9, 26$4.16Jun 11, 26$4.17Jun 15, 26$4.14Jun 17, 26$4.05Jun 22, 26$3.72Jun 24, 26$3.52Jun 26, 26$3.62Jul 2, 26$4.06
$3.3952-week range$10.60
Loading valuation history…

Fundamentals

Key fundamentals

$23.9M

Market cap

45.5%

Revenue growth (YoY)

27.2%

Gross margin

-$4.8M

Free cash flow (USD)

-$9M

Net debt

Net cash position

13.4%

Share dilution

1/5

Graham criteria passed

Defensive-investor screen

Industrials

Sector

Trajectory

Long-term trends

Revenue by year

2016 → 2025

FY 2016$621.0KFY 2017$540.0KFY 2018$530.0KFY 2019$0.00FY 2020$0.00FY 2021$607.0KFY 2022$374.0KFY 2023$2.4MFY 2024$3.6MFY 2025$5.2M
$621K$5.2M

Free cash flow by year

2016 → 2025

FY 2016$-9.7MFY 2017$-8.7MFY 2018$-8.9MFY 2019$-7.3MFY 2020$-6.2MFY 2021$-6.9MFY 2022$-5.2MFY 2023$-3.4MFY 2024$-4.6MFY 2025$-4.8M
-$9.7M-$4.8M

Gross margin by year

2021 → 2025

FY 2021-74.5%FY 202231.0%FY 202334.0%FY 202431.1%FY 202527.2%
-74.5%27.2%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

0

Insider sells · 90 days

Earnings

Last reported: May 20, 2026 (EPS $-0.39)

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • 8-K eventAdditional Shares IssuedJun 18, 2026Filing
  • 8-K eventAnnual Meeting ResultsJun 9, 2026Filing
  • 8-K eventPublic Offering AgreementJun 1, 2026Filing
  • 8-K eventATM Prospectus TerminationMay 28, 2026Filing
  • 8-K eventEarnings ReleaseMay 21, 2026Filing
  • Quarterly report10-Q FiledMay 15, 2026Filing
  • 8-K eventEarnings ReleaseApr 10, 2026Filing
  • Annual report10-K FiledMar 31, 2026Filing

Questions

Frequently asked questions

What is ClearSign Technologies Corporation's market cap?

ClearSign Technologies Corporation (CLIR) has a market capitalization of $23.9M.

What is CLIR's P/E ratio?

A meaningful P/E ratio is not available for CLIR — the company's latest fiscal-year earnings per share is zero, negative, or not yet cached.

What is CLIR's price-to-book (P/B) ratio?

CLIR trades at 2.50 times book value per share.

When did ClearSign Technologies Corporation last report earnings?

CLIR last reported earnings on May 20, 2026; the next date is not yet scheduled.

Are insiders buying CLIR stock?

SEC Form 4 filings show no open-market insider buys at ClearSign Technologies Corporation in the last 90 days (0 sells).

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Timeline

Every filing, insider trade & earnings on a price-anchored timeline

Filing Analyzer

Search the actual 10-K / 10-Q text with AI research angles

News

Latest press coverage in one feed

Data: SEC EDGAR filings and cached fundamental data; prices and ratios use the most recent cached quote and statements (may lag by up to a day). Educational and research purposes only. Not investment advice.