| 2026-11-042026-11-04 | 2026-11-04 | 272.24 | 272.24 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-11-032026-11-03 | 2026-11-03 | 300.08 | 300.08 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-11-022026-11-02 | 2026-11-02 | 284.34 | 284.34 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-302026-10-30 | 2026-10-30 | 320.72 | 320.72 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-292026-10-29 | 2026-10-29 | 349.45 | 349.45 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-282026-10-28 | 2026-10-28 | 363.21 | 363.21 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-272026-10-27 | 2026-10-27 | 351.15 | 351.15 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-262026-10-26 | 2026-10-26 | 335.93 | 335.93 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-232026-10-23 | 2026-10-23 | 320.26 | 320.26 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-222026-10-22 | 2026-10-22 | 322.64 | 322.64 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-212026-10-21 | 2026-10-21 | 361.34 | 361.34 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-202026-10-20 | 2026-10-20 | 341.95 | 341.95 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-192026-10-19 | 2026-10-19 | 344.20 | 344.20 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-162026-10-16 | 2026-10-16 | 332.73 | 332.73 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-152026-10-15 | 2026-10-15 | 356.52 | 356.52 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-142026-10-14 | 2026-10-14 | 359.60 | 359.60 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-132026-10-13 | 2026-10-13 | 400.40 | 400.40 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-122026-10-12 | 2026-10-12 | 405.01 | 405.01 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-092026-10-09 | 2026-10-09 | 449.77 | 449.77 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-082026-10-08 | 2026-10-08 | 425.93 | 425.93 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-072026-10-07 | 2026-10-07 | 446.45 | 446.45 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-062026-10-06 | 2026-10-06 | 443.65 | 443.65 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-052026-10-05 | 2026-10-05 | 389.69 | 389.69 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-022026-10-02 | 2026-10-02 | 391.34 | 391.34 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-10-012026-10-01 | 2026-10-01 | 379.14 | 379.14 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-302026-09-30 | 2026-09-30 | 351.82 | 351.82 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-292026-09-29 | 2026-09-29 | 354.92 | 354.92 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-282026-09-28 | 2026-09-28 | 344.19 | 344.19 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-252026-09-25 | 2026-09-25 | 356.91 | 356.91 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-242026-09-24 | 2026-09-24 | 358.43 | 358.43 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-232026-09-23 | 2026-09-23 | 355.91 | 355.91 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-222026-09-22 | 2026-09-22 | 368.56 | 368.56 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-212026-09-21 | 2026-09-21 | 365.96 | 365.96 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-182026-09-18 | 2026-09-18 | 348.80 | 348.80 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-172026-09-17 | 2026-09-17 | 344.25 | 344.25 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-162026-09-16 | 2026-09-16 | 340.50 | 340.50 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-152026-09-15 | 2026-09-15 | 334.33 | 334.33 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-142026-09-14 | 2026-09-14 | 319.64 | 319.64 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-112026-09-11 | 2026-09-11 | 349.54 | 349.54 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-102026-09-10 | 2026-09-10 | 334.56 | 334.56 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-092026-09-09 | 2026-09-09 | 338.00 | 338.00 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-082026-09-08 | 2026-09-08 | 341.29 | 341.29 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-042026-09-04 | 2026-09-04 | 321.00 | 321.00 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-032026-09-03 | 2026-09-03 | 317.46 | 317.46 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-022026-09-02 | 2026-09-02 | 354.16 | 354.16 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-09-012026-09-01 | 2026-09-01 | 360.33 | 360.33 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-08-312026-08-31 | 2026-08-31 | 382.80 | 382.80 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-08-282026-08-28 | 2026-08-28 | 378.44 | 378.44 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-08-272026-08-27 | 2026-08-27 | 399.85 | 399.85 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|
| 2026-08-262026-08-26 | 2026-08-26 | 404.03 | 404.03 | Not specified | Inputs and citationsAs-reported value https://finance.yahoo.com/quote/CIEN/history/ |
|---|