Daily trading records

ClearSign Technologies Historical Stock Prices by Trading Day

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Review 60 recent trading days for ClearSign Technologies.

The verified trading-day record runs from June 25, 2026 through September 18, 2026.
Select a date to review its open, high, low, close, volume and change from the prior session.
Daily aggregate prices are provided by Polygon.

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Review ClearSign Technologies's price trend and period performance.

The chart connects verified session closes from June 24, 2026 through September 18, 2026.

Closing-price trend by trading session

Period performance is calculated from verified trading sessions.

5-session performance

-4.47%

From the September 11, 2026 close of $4.0301 to $3.85 on September 18, 2026.

20-session performance

-17.82%

From the August 20, 2026 close of $4.685 to $3.85 on September 18, 2026.

60-session performance

+9.37%

From the June 24, 2026 close of $3.5201 to $3.85 on September 18, 2026.

ClearSign Technologies Historical prices
Historical pricesOpenHighLowCloseVolumePrior-close change
$3.7078$3.90$3.705$3.8519,243+$0.24 (+6.65%)
$3.60$3.75$3.60$3.618,696+$0.09 (+2.56%)
$3.8803$3.98$3.50$3.5271,975-$0.515 (-12.76%)
$3.80$4.1774$3.79$4.0355,867+$0.185 (+4.81%)
$3.97$4.265$3.80$3.8523,774-$0.1801 (-4.47%)
$4.09$4.175$3.735$4.030168,707-$0.0099 (-0.25%)
$4.15$4.28$3.90$4.0449,885-$0.18 (-4.27%)
$4.41$4.41$4.22$4.223,323-$0.09 (-2.09%)
$4.00$4.72$4.00$4.3119,516+$0.40 (+10.23%)
$3.98$4.145$3.895$3.919,242-$0.188 (-4.59%)
$4.2701$4.3229$3.95$4.09842,242-$0.152 (-3.58%)
$4.22$4.445$4.10$4.2510,715+$0.10 (+2.41%)
$4.20$4.20$4.15$4.151,609-$0.11 (-2.58%)
$4.35$4.36$4.215$4.264,953-$0.205 (-4.59%)
$4.58$4.745$4.465$4.4654,944-$0.065 (-1.43%)
$4.70$4.81$4.5001$4.537,096-$0.13 (-2.79%)
$4.6654$4.80$4.57$4.668,599-$0.04 (-0.85%)
$4.88$4.936$4.6143$4.7029,287-$0.14 (-2.89%)
$4.43$4.8899$4.345$4.8430,213+$0.3613 (+8.07%)
$4.20$4.56$4.092$4.478723,066-$0.2063 (-4.40%)
$4.53$4.9599$3.86$4.68531,790+$0.285 (+6.48%)
$4.71$4.77$4.2916$4.4022,765-$0.27 (-5.78%)
$4.69$4.85$4.40$4.6713,807+$0.11 (+2.41%)
$4.67$5.00$4.31$4.5620,925-$0.09 (-1.94%)
$4.10$4.70$4.10$4.6527,227+$0.40 (+9.41%)
$4.1101$4.25$4.1101$4.253,542+$0.1158 (+2.80%)
$4.0614$4.1999$4.0614$4.13422,695-$0.0358 (-0.86%)
$3.95$4.17$3.86$4.1725,846+$0.265 (+6.79%)
$3.81$3.95$3.66$3.90515,470+$0.155 (+4.13%)
$3.785$3.785$3.75$3.753,548-$0.09 (-2.34%)
$3.88$3.905$3.73$3.849,955-$0.05 (-1.29%)
$3.98$4.1051$3.825$3.894,528-$0.11 (-2.75%)
$3.96$4.03$3.96$4.002,991+$0.04 (+1.01%)
$3.87$4.33$3.86$3.9618,324+$0.10 (+2.59%)
$3.88$3.962$3.85$3.861,208-$0.04 (-1.03%)
$3.8001$3.9699$3.8001$3.902,666-$0.1159 (-2.89%)
$3.91$4.0371$3.8518$4.01592,759-$0.0241 (-0.60%)
$3.885$4.04$3.8006$4.047,555+$0.06 (+1.51%)
$3.74$4.00$3.74$3.9818,388+$0.49 (+14.04%)
$3.34$3.49$3.34$3.4932,872+$0.14 (+4.18%)
$3.20$3.72$3.20$3.3562,410+$0.10 (+3.08%)
$3.35$3.40$3.16$3.257,379-$0.1001 (-2.99%)
$3.40$3.425$3.35$3.35013,393-$0.0199 (-0.59%)
$3.55$3.55$3.32$3.3713,565-$0.25 (-6.91%)
$3.65$3.66$3.52$3.623,845-$0.02 (-0.55%)
$3.64$3.685$3.64$3.642,811-$0.08 (-2.15%)
$3.6001$3.72$3.6001$3.723,581+$0.01 (+0.27%)
$3.68$3.87$3.68$3.7110,545+$0.09 (+2.49%)
$3.705$3.785$3.6097$3.6216,744-$0.10 (-2.69%)
$3.75$3.75$3.6577$3.726,200-$0.03 (-0.80%)
$3.72$3.80$3.70$3.755,992+$0.05 (+1.35%)
$3.91$3.91$3.6101$3.705,954-$0.14 (-3.65%)
$4.08$4.135$3.82$3.8413,004-$0.26 (-6.34%)
$4.03$4.10$3.95$4.1010,056+$0.04 (+0.99%)
$4.08$4.24$4.06$4.069,536-$0.06 (-1.46%)
$3.785$4.27$3.7572$4.1234,140+$0.45 (+12.26%)
$3.61$3.875$3.58$3.6717,466+$0.03 (+0.82%)
$3.548$3.69$3.50$3.646,330+$0.02 (+0.55%)
$3.40$3.70$3.39$3.6214,654+$0.23 (+6.78%)
$3.54$3.63$3.39$3.3914,409-$0.1301 (-3.70%)

Verified data

Trading days shown
60
Coverage start
June 25, 2026
Coverage end
September 18, 2026
Display currency
USD
Market data provider
Polygon

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Read the frequently asked questions.

What is ClearSign Technologies's latest verified closing price?

ClearSign Technologies closed at $3.85 on September 18, 2026.

What period does ClearSign Technologies's price history cover?

The page shows 60 verified sessions from June 25, 2026 through September 18, 2026.

What data is included in ClearSign Technologies's daily price history?

Each row includes the open, high, low, close, volume and change from the prior close.

Does ClearSign Technologies's price history include market holidays?

The table contains only verified trading sessions and does not create prices for market holidays.

What is the source for ClearSign Technologies's daily prices?

Daily aggregate prices are provided by Polygon.