NASDAQ · CLIR

ClearSign Technologies Corp

Closing price · Nov 13, 2026 $2.30
Last insider buy price $5.25 Paid by Director Gil Silva on Apr 23, 2026 (Form 4). Not today's price.

Latest quarter · ended Jun 30, 2026

Cash got weaker, but sales grew

descriptionFiled Aug 14, 2026
Revenue growthFaster
+321.1%
Quarter ended Sep 30, 2024: +2087.1% sales vs. a year beforeQuarter ended Dec 31, 2024: −53.7% sales vs. a year beforeQuarter ended Mar 31, 2025: −63.6% sales vs. a year beforeQuarter ended Jun 30, 2025: +195.6% sales vs. a year beforeQuarter ended Sep 30, 2025: −44.6% sales vs. a year beforeQuarter ended Dec 31, 2025: +522.2% sales vs. a year beforeQuarter ended Mar 31, 2026: −52.4% sales vs. a year beforeQuarter ended Jun 30, 2026: +321.1% sales vs. a year before
Sep '24Jun '26
$560K vs. $133K a year ago
Gross marginWorse
40.7%
Quarter ended Sep 30, 2024: 29.6% gross marginQuarter ended Dec 31, 2024: 14.9% gross marginQuarter ended Mar 31, 2025: 48.9% gross marginQuarter ended Jun 30, 2025: 41.4% gross marginQuarter ended Sep 30, 2025: 35.8% gross marginQuarter ended Dec 31, 2025: 21.9% gross marginQuarter ended Mar 31, 2026: -205.8% gross marginQuarter ended Jun 30, 2026: 40.7% gross margin
Sep '24Jun '26
vs. 41.4% a year ago
Cash from operationsWorse
−$1.24M
Quarter ended Sep 30, 2024: −$1.43M cash from operationsQuarter ended Dec 31, 2024: −$415K cash from operationsQuarter ended Mar 31, 2025: −$1.11M cash from operationsQuarter ended Jun 30, 2025: −$511K cash from operationsQuarter ended Sep 30, 2025: −$1.83M cash from operationsQuarter ended Dec 31, 2025: −$1.28M cash from operationsQuarter ended Mar 31, 2026: −$1.35M cash from operationsQuarter ended Jun 30, 2026: −$1.24M cash from operations
Sep '24Jun '26
vs. −$511K a year ago
Share countBuying back
−87.0%
Quarter ended Sep 30, 2024: 50.23M sharesQuarter ended Dec 31, 2024: 52.42M sharesQuarter ended Mar 31, 2025: 52.42M sharesQuarter ended Jun 30, 2025: 52.43M sharesQuarter ended Sep 30, 2025: 53.27M sharesQuarter ended Dec 31, 2025: 5.41M sharesQuarter ended Mar 31, 2026: 5.41M sharesQuarter ended Jun 30, 2026: 6.81M shares
Sep '24Jun '26
6.81M shares vs. 52.43M a year ago

Numbers come from the company's own 10-Q and 10-K reports filed with the SEC. Each bar is one quarter, oldest on the left. The colored bar is the latest. Hover over or tap a bar to see its number.

Smart money pulse

What insiders and funds are doing

Mixed Insiders: as of Nov 13 Funds: as of Jun 30, 2026
−1000+100 0
  • info
    No real insider sales in 12 months. Planned 10b5-1 sales and tax withholding are left out.

−100 means everyone selling, +100 everyone buying. This is data, not advice.

How the Pulse works

Pulse runs from −100 (everyone selling) to +100 (everyone buying). Half comes from insiders: real buyers vs. real sellers in the last 90 days (Form 4). Half comes from funds: funds that bought vs. funds that sold last quarter (13F). 13F is a snapshot of long positions on the last day of the quarter, filed up to 45 days later. It does not show short positions or trades since then.

Who owns it

27 funds report owning CLIR, up from 20

Holdings as of Jun 30, 2026
New8
Added3
Held15
Trimmed1
Sold out1

Insider trades · last 12 months

Real buys and sales

● Open-market buy● Open-market sale
CEOCFOOther officersDirectorsDecJanFebMarAprMayJunJulAugSepOctNovShares withheld for tax · Feb 2 · $2.23KOption exercise · Feb 2 · 10,127 shOption exercise · Feb 20 · 9,315 shShares withheld for tax · Feb 20 · $2.01KOption exercise · Feb 22 · 7,547 shShares withheld for tax · Feb 22 · $1.63KStock grant · Feb 26 · 210,043 shShares withheld for tax · Feb 26 · $58.8KShares withheld for tax · Feb 26 · $11.6KStock grant · Feb 26 · 56,645 shOpen-market buy · Mar 16 · $8.72KOpen-market buy · Mar 17 · $8.4KOpen-market buy · Apr 23 · $10.6K
CEOCFOOther officersDirectorsDecFebAprJunAugOctShares withheld for tax · Feb 2 · $2.23KOption exercise · Feb 2 · 10,127 shOption exercise · Feb 20 · 9,315 shShares withheld for tax · Feb 20 · $2.01KOption exercise · Feb 22 · 7,547 shShares withheld for tax · Feb 22 · $1.63KStock grant · Feb 26 · 210,043 shShares withheld for tax · Feb 26 · $58.8KShares withheld for tax · Feb 26 · $11.6KStock grant · Feb 26 · 56,645 shOpen-market buy · Mar 16 · $8.72KOpen-market buy · Mar 17 · $8.4KOpen-market buy · Apr 23 · $10.6K

Last 12 months. No real trades in the last 6.

Showing 3 real trades. Hidden: 2 stock grants, 5 tax withholdings, 3 option exercises. Those happen on a schedule and say little about what an insider thinks. Bigger dot means a bigger trade.

Real trades, newest first

Apr 23 Gil Silva Director Open-market buy $10.6K 2,000 sh at $5.29
Mar 17 Gil Silva Director Open-market buy $8.4K 2,000 sh at $4.20
Mar 16 Gil Silva Director Open-market buy $8.72K 2,000 sh at $4.36

Showing every filing. Dashed circles are routine: grants, tax withholding, option exercises and planned sales.

Top holders

Biggest funds in CLIR

As of Jun 30, 2026
FundOwnsValueChange
Vanguard Capital Management LLC1.5%$387KSame
Simon Quick Advisors, LLC0.9%$221KSame
Geode Capital Management, LLC0.8%$189K−11%
Cambridge Investment Research Advisors, Inc.0.7%$163KSame
Beacon Pointe Advisors, LLC0.4%$99.7KSame

"Owns" is shares reported divided by shares outstanding.

Where this data comes from. Insider trades, fund holdings, activist stakes and company results come from public SEC EDGAR filings (Forms 4, 13F, 13D/13G, 10-Q and 8-K). Congress trades come from the STOCK Act reports members file with the House Clerk and the Senate. Daily closing prices come from post-no-preference/stocks on DoltHub, a community-run database shared under CC BY-SA 4.0; the prices we show stay under that license. They are each day's close, not live or official exchange prices.

This is data, not investment advice. About StockToast