The highest closing price for Ciena (CIEN) last month was $445.18, on August 17. It was up 4.9% for the month. The latest price is $334.64.
| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME |
|---|---|---|---|---|---|
August 31 2026 | $378.44 | $382.94 | $370.77 | $382.80 | 1,826,500 |
August 28 2026 | $400.42 | $400.50 | $376.64 | $378.44 | 1,317,800 |
August 27 2026 | $411.53 | $418.72 | $395.50 | $399.85 | 1,207,100 |
August 26 2026 | $387.23 | $406.44 | $387.23 | $404.03 | 1,189,500 |
August 25 2026 | $386.33 | $388.73 | $378.94 | $387.66 | 1,191,100 |
August 24 2026 | $386.26 | $386.26 | $362.48 | $371.95 | 1,777,300 |
August 21 2026 | $396.00 | $403.72 | $382.75 | $395.79 | 1,234,900 |
August 20 2026 | $400.35 | $404.35 | $389.10 | $392.48 | 1,453,100 |
August 19 2026 | $415.50 | $415.50 | $392.67 | $399.47 | 1,771,900 |
August 18 2026 | $421.59 | $427.74 | $391.77 | $405.54 | 3,052,300 |
August 17 2026 | $438.38 | $458.00 | $427.45 | $445.18 | 2,494,700 |
August 14 2026 | $441.61 | $446.15 | $422.49 | $428.77 | 2,519,000 |
August 13 2026 | $430.32 | $462.69 | $427.00 | $442.79 | 2,912,900 |
August 12 2026 | $414.51 | $446.36 | $409.24 | $432.05 | 3,989,300 |
August 11 2026 | $388.84 | $394.99 | $384.19 | $387.53 | 1,534,900 |
August 10 2026 | $420.00 | $420.00 | $387.28 | $387.70 | 2,021,700 |
August 07 2026 | $411.04 | $420.00 | $396.89 | $412.39 | 1,887,200 |
August 06 2026 | $396.05 | $419.49 | $390.56 | $403.76 | 1,354,100 |
August 05 2026 | $408.56 | $424.58 | $399.07 | $408.83 | 1,773,900 |
August 04 2026 | $419.08 | $427.00 | $405.01 | $411.13 | 2,069,060 |
August 03 2026 | $365.00 | $391.87 | $355.00 | $390.76 | 1,243,704 |
Daily pricing data for Ciena dates back to 2/7/1997, and may be incomplete.