ClearSign Technologies Corporation (CLIR) Stock Price History
Historical prices from 2012 to 2026
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CLIR Historical Performance
Short-Term Returns
CLIR Stock Price Trajectory (2012–2026)
As of May 8, 2026, ClearSign Technologies Corporation (CLIR) trades at $4.83, representing a -10.6% return over the past year. The stock has delivered a -89.1% total return over five years (-35.8% CAGR), reflecting challenging market conditions.
The stock reached its all-time high of $138.70 on January 16, 2014. From this peak, CLIR has corrected -96.5%, currently trading 25% below its 200-day moving average, suggesting potential weakness.
When compared to Industrials sector peers FTEK (+60.7% 1Y), PESI (+26.2% 1Y), and CECO (+220.1% 1Y), CLIR has underperformed the peer group average. Compare CLIR vs FTEK →
CLIR Historical Price Data (2025–2026)
Showing 30 of 3,530 recordsLoading full history…
| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-05-07 | 4.97 | 4.97 | 4.69 | 4.83 | 16K | -1.63% |
| 2026-05-06 | 4.97 | 4.99 | 4.80 | 4.91 | 15K | 0.00% |
| 2026-05-05 | 4.94 | 4.99 | 4.88 | 4.91 | 5K | -2.96% |
| 2026-05-04 | 5.14 | 5.14 | 4.57 | 5.06 | 16K | -1.17% |
| 2026-05-01 | 5.05 | 5.22 | 5.01 | 5.12 | 14K | +2.40% |
| 2026-04-30 | 5.33 | 5.33 | 5.00 | 5.00 | 9K | -6.89% |
| 2026-04-29 | 5.33 | 5.56 | 5.33 | 5.37 | 3K | +0.75% |
| 2026-04-28 | 5.44 | 5.51 | 5.32 | 5.33 | 9K | +1.91% |
| 2026-04-27 | 5.14 | 5.33 | 4.73 | 5.23 | 15K | +4.60% |
| 2026-04-24 | 5.08 | 5.13 | 5.00 | 5.00 | 6K | -3.10% |
| 2026-04-23 | 5.48 | 5.50 | 5.06 | 5.16 | 15K | -7.69% |
| 2026-04-22 | 5.48 | 5.80 | 5.48 | 5.59 | 13K | +3.52% |
| 2026-04-21 | 5.44 | 5.53 | 5.21 | 5.40 | 12K | +1.12% |
| 2026-04-20 | 5.56 | 5.66 | 5.19 | 5.34 | 56K | -2.02% |
| 2026-04-17 | 5.33 | 5.68 | 5.33 | 5.45 | 21K | +4.41% |
| 2026-04-16 | 5.90 | 6.14 | 5.22 | 5.22 | 17K | -10.62% |
| 2026-04-15 | 5.60 | 5.96 | 5.60 | 5.84 | 17K | +8.55% |
| 2026-04-14 | 5.47 | 5.60 | 5.26 | 5.38 | 19K | -0.19% |
| 2026-04-13 | 5.29 | 5.39 | 4.93 | 5.39 | 48K | +1.89% |
| 2026-04-10 | 6.28 | 6.59 | 4.73 | 5.29 | 133K | -14.40% |
| 2026-04-09 | 6.30 | 6.87 | 5.99 | 6.18 | 58K | -4.48% |
| 2026-04-08 | 6.58 | 6.59 | 5.99 | 6.47 | 40K | +5.20% |
| 2026-04-07 | 6.45 | 6.98 | 5.55 | 6.15 | 77K | -11.38% |
| 2026-04-06 | 4.85 | 7.56 | 4.80 | 6.94 | 691K | +43.69% |
| 2026-04-02 | 4.72 | 4.94 | 4.31 | 4.83 | 8K | +2.55% |
| 2026-04-01 | 4.39 | 4.71 | 4.35 | 4.71 | 14K | +8.03% |
| 2026-03-31 | 3.69 | 4.46 | 3.69 | 4.36 | 11K | +13.25% |
| 2026-03-30 | 3.78 | 4.04 | 3.60 | 3.85 | 44K | +2.94% |
| 2026-03-27 | 3.71 | 3.76 | 3.24 | 3.74 | 10K | +0.54% |
| 2026-03-26 | 3.50 | 4.06 | 3.50 | 3.72 | 19K | +4.20% |
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Start ComparisonCLIR — Frequently Asked Questions
Quick answers to the most common questions about buying CLIR stock.
How has CLIR stock performed recently?
CLIR declined -10.6% over the past year, below its 5-year annualized CAGR of -35.8%. The stock trades below its 200-day moving average, reflecting the downtrend.
What is CLIR's all-time high price?
ClearSign Technologies Corporation reached $138.70 on 2014-01-16. The 52-week high is $11.20. Current 1-year return of -10.6% places the stock further from historical peaks.
Where can I download CLIR historical price data?
This page provides CLIR daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2012-2026, downloadable in CSV format.