Stock listing
OTC:RBCN Rubicon Technology, Inc. Stock
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Share price · OTC:RBCN
$4.76 USD -0.34 (-6.7%)
Close on Oct 30, 2026
- Day range
- $4.76 – $4.76 USDOct 30, 2026
- Volume
- 500 sharesOct 30, 2026
- Market cap
- $44.64M USDAt the close on Oct 30, 2026 · price × 9.38M shares outstanding
- 52-week range
- $2.55 – $6.70 USDLowest and highest trades, Oct 31, 2025 – Oct 30, 2026
- Traded on an average day
- $3,457 USDMedian day 2 shares · 31 days with no trades · last 3 months, Jul 30, 2026 – Oct 30, 2026
Daily closes
Last 3 months, Jul 30, 2026 – Oct 30, 2026 · OTC:RBCN · USD, adjusted for splits
| Day | Close | Change | % | Open | High | Low | Volume |
|---|---|---|---|---|---|---|---|
| $4.76 | -0.34 | -6.7% | $4.76 | $4.76 | $4.76 | 500 | |
| $5.10 | 0.00 | 0.0% | $5.10 | $5.10 | $5.10 | 300 | |
| $5.10 | +0.30 | +6.2% | $4.93 | $5.10 | $4.60 | 2,200 | |
| $4.80 | 0.00 | 0.0% | $5.12 | $5.12 | $4.80 | 2,100 | |
| $4.80 | -0.51 | -9.6% | $5.31 | $5.31 | $4.60 | 2,800 | |
| $5.31 | -0.19 | -3.5% | $4.84 | $5.31 | $4.84 | 1,800 | |
| $5.50 | -0.11 | -2.0% | $5.60 | $5.60 | $5.03 | 5,700 | |
| $5.61 | 0.00 | 0.0% | $5.61 | $5.61 | $5.61 | 0 | |
| $5.61 | 0.00 | 0.0% | $5.61 | $5.61 | $5.61 | 0 | |
| $5.61 | 0.00 | 0.0% | $5.61 | $5.61 | $5.61 | 0 | |
| $5.61 | 0.00 | 0.0% | $5.61 | $5.61 | $5.61 | 0 | |
| $5.61 | +0.01 | +0.2% | $5.61 | $5.61 | $5.61 | 100 | |
| $5.60 | 0.00 | 0.0% | $5.60 | $5.60 | $5.60 | 0 | |
| $5.60 | 0.00 | 0.0% | $5.60 | $5.60 | $5.60 | 0 | |
| $5.60 | 0.00 | 0.0% | $5.60 | $5.60 | $5.60 | 0 | |
| $5.60 | -0.01 | -0.2% | $5.60 | $5.60 | $5.60 | 200 | |
| $5.61 | -0.11 | -1.9% | $5.61 | $5.61 | $5.61 | 100 | |
| $5.72 | 0.00 | 0.0% | $5.72 | $5.72 | $5.72 | 0 | |
| $5.72 | 0.00 | 0.0% | $5.72 | $5.72 | $5.72 | 0 | |
| $5.72 | 0.00 | 0.0% | $5.72 | $5.72 | $5.72 | 0 | |
| $5.72 | 0.00 | 0.0% | $5.72 | $5.72 | $5.72 | 0 | |
| $5.72 | 0.00 | 0.0% | $5.72 | $5.72 | $5.72 | 0 | |
| $5.72 | 0.00 | 0.0% | $5.72 | $5.72 | $5.72 | 0 | |
| $5.72 | 0.00 | 0.0% | $5.72 | $5.72 | $5.72 | 0 | |
| $5.72 | +0.17 | +3.1% | $5.72 | $5.72 | $5.72 | 100 | |
| $5.55 | 0.00 | 0.0% | $5.55 | $5.55 | $5.55 | 0 | |
| $5.55 | 0.00 | 0.0% | $5.55 | $5.55 | $5.55 | 0 | |
| $5.55 | 0.00 | 0.0% | $5.55 | $5.55 | $5.55 | 5 | |
| $5.55 | 0.00 | 0.0% | $5.55 | $5.55 | $5.55 | 2 | |
| $5.55 | 0.00 | 0.0% | $5.55 | $5.55 | $5.55 | 0 | |
| $5.55 | 0.00 | 0.0% | $5.55 | $5.55 | $5.55 | 2 | |
| $5.55 | -0.80 | -12.6% | $5.70 | $5.70 | $5.55 | 400 | |
| $6.35 | -0.35 | -5.2% | $6.35 | $6.35 | $6.35 | 200 | |
| $6.70 | 0.00 | 0.0% | $6.70 | $6.70 | $6.70 | 0 | |
| $6.70 | 0.00 | 0.0% | $6.70 | $6.70 | $6.70 | 200 | |
| $6.70 | +0.45 | +7.2% | $6.54 | $6.70 | $6.54 | 1,000 | |
| $6.25 | 0.00 | 0.0% | $6.25 | $6.25 | $6.25 | 0 | |
| $6.25 | -0.05 | -0.8% | $6.25 | $6.25 | $6.25 | 200 | |
| $6.30 | +0.04 | +0.6% | $6.30 | $6.30 | $6.30 | 1,600 | |
| $6.26 | 0.00 | 0.0% | $6.26 | $6.26 | $6.26 | 0 | |
| $6.26 | 0.00 | 0.0% | $6.26 | $6.26 | $6.26 | 15 | |
| $6.26 | 0.00 | 0.0% | $6.26 | $6.26 | $6.26 | 0 | |
| $6.26 | 0.00 | 0.0% | $6.26 | $6.26 | $6.26 | 0 | |
| $6.26 | +0.01 | +0.2% | $6.26 | $6.26 | $6.26 | 600 | |
| $6.25 | 0.00 | 0.0% | $6.25 | $6.25 | $6.25 | 0 | |
| $6.25 | 0.00 | 0.0% | $6.25 | $6.25 | $6.25 | 0 | |
| $6.25 | 0.00 | 0.0% | $6.25 | $6.25 | $6.25 | 15 | |
| $6.25 | +0.13 | +2.1% | $6.25 | $6.25 | $6.25 | 900 | |
| $6.12 | 0.00 | 0.0% | $6.12 | $6.12 | $6.12 | 0 | |
| $6.12 | 0.00 | 0.0% | $6.12 | $6.12 | $6.12 | 0 | |
| $6.12 | 0.00 | 0.0% | $6.12 | $6.12 | $6.12 | 0 | |
| $6.12 | -0.38 | -5.8% | $6.22 | $6.22 | $5.87 | 1,200 | |
| $6.50 | 0.00 | 0.0% | $6.50 | $6.50 | $6.50 | 100 | |
| $6.50 | 0.00 | 0.0% | $6.50 | $6.50 | $6.50 | 0 | |
| $6.50 | +0.28 | +4.5% | $6.50 | $6.50 | $6.50 | 500 | |
| $6.22 | 0.00 | 0.0% | $6.22 | $6.22 | $6.22 | 0 | |
| $6.22 | +0.35 | +6.0% | $5.97 | $6.22 | $5.66 | 4,800 | |
| $5.87 | +0.17 | +3.0% | $5.90 | $5.97 | $5.84 | 1,000 | |
| $5.70 | -0.10 | -1.7% | $5.40 | $5.70 | $5.40 | 500 | |
| $5.80 | +0.50 | +9.4% | $5.65 | $5.90 | $5.65 | 10,200 | |
| $5.30 | 0.00 | 0.0% | $5.30 | $5.30 | $5.30 | 2 | |
| $5.30 | 0.00 | 0.0% | $5.30 | $5.30 | $5.30 | 500 | |
| $5.30 | 0.00 | 0.0% | $5.30 | $5.30 | $5.30 | 200 | |
| $5.30 | 0.00 | 0.0% | $5.30 | $5.30 | $5.30 | 120 | |
| $5.30 | 0.00 | 0.0% | $5.30 | $5.30 | $5.30 | 0 | |
| $5.30 | 0.00 | 0.0% | $5.30 | $5.30 | $5.30 | 0 |
- Ticker
- OTC:RBCN
- Asset type
- Stock
- Exchange
- OTC
- Currency
- USD
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