Ciena Corp (CIEN) — Price History
As of 2026-08-07 — refreshed nightly from the Closelook data lake. Diary readings, not advice.
Daily prices
| Date | Open | High | Low | Close | Chg % | Volume |
|---|---|---|---|---|---|---|
| 2026-08-07 | 411.04 | 420.00 | 396.89 | 412.39 | +2.14% | 1,886,600 |
| 2026-08-06 | 396.05 | 419.49 | 390.56 | 403.76 | -1.24% | 1,354,100 |
| 2026-08-05 | 408.56 | 424.58 | 399.07 | 408.83 | -0.56% | 1,773,900 |
| 2026-08-04 | 419.08 | 427.00 | 405.01 | 411.13 | +5.21% | 2,068,800 |
| 2026-08-03 | 365.00 | 391.87 | 355.00 | 390.76 | +3.64% | 1,243,700 |
| 2026-07-31 | 393.98 | 401.00 | 374.38 | 377.05 | +1.34% | 1,948,400 |
| 2026-07-30 | 359.27 | 373.09 | 355.00 | 372.07 | +12.62% | 2,461,500 |
| 2026-07-29 | 349.64 | 350.80 | 323.29 | 330.37 | -5.75% | 2,633,300 |
| 2026-07-28 | 354.90 | 357.47 | 328.80 | 350.51 | -7.09% | 4,177,400 |
| 2026-07-27 | 388.19 | 388.19 | 360.00 | 377.27 | -3.50% | 1,512,500 |
| 2026-07-24 | 401.85 | 408.74 | 386.25 | 390.96 | -4.07% | 1,489,200 |
| 2026-07-23 | 394.10 | 415.80 | 394.10 | 407.53 | +2.61% | 1,803,700 |
| 2026-07-22 | 396.95 | 411.01 | 396.87 | 397.16 | -2.83% | 1,755,700 |
| 2026-07-21 | 397.70 | 412.04 | 396.55 | 408.73 | +7.91% | 2,036,400 |
| 2026-07-20 | 375.01 | 394.56 | 375.00 | 378.77 | +1.16% | 1,757,400 |
| 2026-07-17 | 370.99 | 388.61 | 359.01 | 374.41 | -3.70% | 3,366,100 |
| 2026-07-16 | 404.79 | 410.31 | 386.65 | 388.81 | -7.09% | 2,602,500 |
| 2026-07-15 | 451.01 | 451.01 | 404.40 | 418.46 | -6.37% | 1,655,800 |
| 2026-07-14 | 460.88 | 466.66 | 446.25 | 446.93 | +0.33% | 1,247,171 |
| 2026-07-13 | 448.67 | 461.45 | 440.51 | 445.44 | -3.32% | 1,220,453 |
| 2026-07-10 | 453.00 | 464.42 | 450.00 | 460.72 | -0.35% | 1,282,900 |
| 2026-07-09 | 460.60 | 485.69 | 459.81 | 462.34 | +4.85% | 2,045,400 |
| 2026-07-08 | 419.22 | 442.14 | 415.70 | 440.97 | +5.27% | 1,826,200 |
| 2026-07-07 | 418.77 | 425.96 | 404.43 | 418.91 | -3.44% | 1,815,700 |
| 2026-07-06 | 426.99 | 446.40 | 422.30 | 433.83 | +2.69% | 1,329,600 |
| 2026-07-02 | 454.16 | 459.73 | 414.17 | 422.46 | -8.65% | 2,153,800 |
| 2026-07-01 | 466.20 | 482.16 | 459.23 | 462.44 | -5.73% | 2,042,900 |
| 2026-06-30 | 478.93 | 491.79 | 472.59 | 490.56 | +2.43% | 2,445,500 |
| 2026-06-29 | 476.10 | 482.46 | 435.12 | 478.93 | -0.12% | 4,074,900 |
| 2026-06-26 | 466.33 | 493.26 | 457.70 | 479.50 | -1.07% | 8,736,100 |
| 2026-06-25 | 477.42 | 494.53 | 451.56 | 484.69 | +4.57% | 3,554,900 |
| 2026-06-24 | 449.36 | 480.59 | 440.70 | 463.51 | +0.80% | 2,802,000 |
| 2026-06-23 | 437.00 | 467.89 | 432.49 | 459.85 | -0.10% | 3,816,500 |
| 2026-06-22 | 437.83 | 461.50 | 430.51 | 460.33 | +7.50% | 3,863,800 |
| 2026-06-18 | 450.80 | 451.60 | 425.08 | 428.22 | -1.95% | 4,297,300 |
| 2026-06-17 | 433.00 | 449.00 | 424.33 | 436.72 | +1.49% | 2,883,800 |
| 2026-06-16 | 458.73 | 463.55 | 426.62 | 430.30 | -7.14% | 4,210,600 |
| 2026-06-15 | 469.95 | 479.51 | 447.63 | 463.41 | +3.91% | 3,955,900 |
| 2026-06-12 | 445.22 | 458.47 | 440.71 | 445.98 | +0.17% | 2,665,200 |
| 2026-06-11 | 441.66 | 451.10 | 430.82 | 445.22 | +2.43% | 3,000,400 |
| 2026-06-10 | 442.00 | 450.78 | 424.45 | 434.65 | -1.07% | 3,869,900 |
| 2026-06-09 | 465.91 | 467.60 | 417.34 | 439.34 | -5.86% | 7,863,900 |
| 2026-06-08 | 489.78 | 493.09 | 457.79 | 466.67 | -4.41% | 5,635,300 |
| 2026-06-05 | 512.31 | 525.15 | 488.14 | 488.21 | -8.85% | 4,195,400 |
| 2026-06-04 | 552.39 | 552.39 | 491.00 | 535.63 | -13.66% | 7,611,800 |
| 2026-06-03 | 628.51 | 637.51 | 609.79 | 620.37 | -1.06% | 2,654,000 |
| 2026-06-02 | 583.58 | 629.61 | 581.63 | 627.00 | +10.08% | 2,725,900 |
| 2026-06-01 | 559.52 | 579.97 | 552.59 | 569.61 | -1.83% | 2,894,200 |
| 2026-05-29 | 566.02 | 582.47 | 539.57 | 580.23 | +1.76% | 3,862,900 |
| 2026-05-28 | 598.80 | 604.43 | 561.30 | 570.18 | -2.04% | 1,813,700 |
| 2026-05-27 | 605.54 | 605.54 | 576.88 | 582.08 | -3.37% | 1,751,500 |
| 2026-05-26 | 591.00 | 605.61 | 575.51 | 602.39 | +3.19% | 1,407,700 |
| 2026-05-22 | 599.00 | 599.50 | 574.03 | 583.74 | -0.59% | 1,620,800 |
| 2026-05-21 | 557.00 | 590.13 | 555.71 | 587.23 | +5.85% | 1,548,500 |
| 2026-05-20 | 554.21 | 572.39 | 545.10 | 554.76 | +2.37% | 1,985,900 |
| 2026-05-19 | 514.04 | 542.92 | 499.01 | 541.92 | +3.32% | 2,331,500 |
| 2026-05-18 | 563.49 | 567.08 | 516.61 | 524.53 | -5.40% | 2,502,800 |
| 2026-05-15 | 570.65 | 574.20 | 553.30 | 554.46 | -6.27% | 2,423,400 |
| 2026-05-14 | 577.90 | 591.57 | 566.00 | 591.57 | +2.37% | 1,121,900 |
| 2026-05-13 | 594.00 | 598.84 | 562.50 | 577.90 | +0.13% | 1,272,700 |
| 2026-05-12 | 567.78 | 582.00 | 546.98 | 577.15 | -0.74% | 1,603,700 |
| 2026-05-11 | 558.00 | 593.00 | 550.49 | 581.47 | +6.09% | 2,380,700 |
| 2026-05-08 | 549.00 | 564.83 | 538.77 | 548.11 | +1.74% | 1,501,600 |
| 2026-05-07 | 564.39 | 569.00 | 515.49 | 538.76 | -6.59% | 3,546,900 |
| 2026-05-06 | 563.00 | 583.78 | 550.06 | 576.79 | +5.88% | 2,244,800 |
| 2026-05-05 | 553.63 | 562.00 | 539.43 | 544.75 | +1.16% | 1,632,400 |
| 2026-05-04 | 540.00 | 548.20 | 528.36 | 538.51 | +0.60% | 1,198,600 |
| 2026-05-01 | 527.25 | 550.00 | 518.58 | 535.29 | +1.46% | 1,733,800 |
| 2026-04-30 | 487.97 | 529.89 | 486.25 | 527.58 | +10.98% | 2,665,500 |
| 2026-04-29 | 480.14 | 482.54 | 468.31 | 475.39 | +0.36% | 1,830,400 |
| 2026-04-28 | 485.00 | 493.31 | 461.07 | 473.69 | -6.45% | 3,103,100 |
| 2026-04-27 | 515.82 | 516.34 | 485.00 | 506.34 | -2.78% | 1,684,200 |
| 2026-04-24 | 514.82 | 527.50 | 505.55 | 520.80 | +0.96% | 1,418,300 |
| 2026-04-23 | 505.00 | 527.86 | 497.09 | 515.85 | +3.38% | 2,281,900 |
| 2026-04-22 | 511.50 | 518.15 | 467.19 | 498.97 | -1.38% | 2,778,000 |
| 2026-04-21 | 507.77 | 522.50 | 493.54 | 505.93 | +0.53% | 1,805,700 |
| 2026-04-20 | 512.00 | 517.88 | 497.62 | 503.27 | -0.82% | 1,963,500 |
| 2026-04-17 | 500.47 | 513.83 | 495.17 | 507.43 | +2.48% | 1,926,300 |
| 2026-04-16 | 476.75 | 495.40 | 462.00 | 495.17 | +4.08% | 2,298,700 |
| 2026-04-15 | 471.78 | 481.28 | 454.34 | 475.76 | +1.83% | 3,041,100 |
| 2026-04-14 | 486.75 | 487.74 | 458.01 | 467.19 | -2.65% | 3,429,500 |
| 2026-04-13 | 493.44 | 494.60 | 472.32 | 479.90 | -3.25% | 3,048,400 |
| 2026-04-10 | 498.11 | 508.64 | 475.22 | 496.02 | +1.77% | 2,498,400 |
| 2026-04-09 | 498.91 | 513.49 | 473.73 | 487.38 | -1.34% | 3,280,400 |
| 2026-04-08 | 475.50 | 499.39 | 471.66 | 494.01 | +10.30% | 4,110,400 |
| 2026-04-07 | 435.28 | 449.34 | 421.30 | 447.88 | +3.14% | 1,969,500 |
| 2026-04-06 | 455.45 | 459.80 | 432.77 | 434.26 | -3.02% | 1,939,100 |
| 2026-04-02 | 400.98 | 453.00 | 400.00 | 447.76 | +7.79% | 3,617,700 |
| 2026-04-01 | 401.71 | 421.99 | 399.82 | 415.39 | +7.00% | 2,677,100 |
| 2026-03-31 | 373.77 | 388.72 | 364.16 | 388.23 | +6.36% | 3,021,000 |
| 2026-03-30 | 411.00 | 414.75 | 361.70 | 365.00 | -9.12% | 3,512,400 |
| 2026-03-27 | 394.82 | 411.50 | 391.36 | 401.61 | +3.51% | 2,518,013 |
| 2026-03-26 | 428.47 | 428.74 | 387.40 | 387.99 | -11.36% | 3,719,886 |
| 2026-03-25 | 431.50 | 446.89 | 423.88 | 437.70 | +1.94% | 2,670,787 |
| 2026-03-24 | 405.00 | 434.22 | 405.00 | 429.38 | +5.27% | 3,382,007 |
| 2026-03-23 | 399.40 | 415.57 | 393.95 | 407.90 | +6.25% | 3,544,005 |
| 2026-03-20 | 416.00 | 419.80 | 380.11 | 383.89 | -6.95% | 5,809,564 |
| 2026-03-19 | 373.12 | 416.76 | 371.00 | 412.58 | +7.09% | 3,934,558 |
| 2026-03-18 | 376.00 | 402.17 | 376.00 | 385.26 | +4.11% | 4,159,451 |
| 2026-03-17 | 358.31 | 379.42 | 350.36 | 370.05 | +1.70% | 3,263,987 |
| 2026-03-16 | 345.00 | 367.45 | 344.99 | 363.88 | +7.85% | 3,759,723 |
| 2026-03-13 | 339.22 | 353.25 | 334.50 | 337.38 | +0.16% | 2,425,790 |
| 2026-03-12 | 344.26 | 350.33 | 329.41 | 336.83 | -0.92% | 2,641,061 |
| 2026-03-11 | 333.89 | 346.06 | 329.58 | 339.95 | +0.77% | 2,063,731 |
| 2026-03-10 | 325.00 | 349.77 | 325.00 | 337.36 | +5.91% | 3,020,891 |
| 2026-03-09 | 289.49 | 319.29 | 287.25 | 318.54 | +8.28% | 3,070,255 |
| 2026-03-06 | 294.81 | 315.84 | 293.11 | 294.17 | -1.71% | 3,924,162 |
| 2026-03-05 | 312.01 | 315.50 | 278.39 | 299.30 | -12.88% | 7,851,824 |
| 2026-03-04 | 339.19 | 353.78 | 335.00 | 343.55 | +3.15% | 2,708,630 |
| 2026-03-03 | 339.57 | 340.69 | 320.31 | 333.07 | -5.84% | 3,014,089 |
| 2026-03-02 | 353.76 | 364.05 | 345.06 | 353.73 | +1.44% | 2,527,510 |
| 2026-02-27 | 340.66 | 353.57 | 337.11 | 348.70 | +2.21% | 3,083,021 |
| 2026-02-26 | 354.59 | 358.63 | 326.76 | 341.16 | -3.44% | 2,612,883 |
| 2026-02-25 | 345.99 | 365.90 | 345.68 | 353.33 | +3.10% | 2,348,344 |
| 2026-02-24 | 341.00 | 348.28 | 334.91 | 342.70 | -0.62% | 2,270,180 |
| 2026-02-23 | 332.86 | 346.55 | 330.20 | 344.84 | +2.95% | 2,197,402 |
| 2026-02-20 | 317.04 | 340.27 | 314.69 | 334.95 | +5.19% | 2,527,668 |
| 2026-02-19 | 308.88 | 320.42 | 303.55 | 318.41 | +2.40% | 2,389,495 |
| 2026-02-18 | 302.72 | 317.28 | 299.96 | 310.96 | +2.85% | 2,223,837 |
| 2026-02-17 | 297.91 | 307.63 | 286.81 | 302.33 | -0.52% | 2,182,171 |
| 2026-02-13 | 293.83 | 304.18 | 270.00 | 303.92 | +3.74% | 3,088,177 |
| 2026-02-12 | 300.00 | 305.00 | 284.15 | 292.96 | -1.44% | 2,871,527 |
| 2026-02-11 | 307.28 | 308.81 | 286.55 | 297.25 | -0.49% | 3,525,878 |
| 2026-02-10 | 288.08 | 298.99 | 280.04 | 298.70 | +3.11% | 2,274,468 |
| 2026-02-09 | 270.70 | 297.01 | 266.61 | 289.68 | +6.77% | 4,303,788 |
| 2026-02-06 | 262.65 | 273.00 | 251.26 | 271.32 | +7.25% | 33,471,359 |
| 2026-02-05 | 242.64 | 261.00 | 238.57 | 252.98 | -0.21% | 3,316,187 |
| 2026-02-04 | 277.05 | 285.97 | 248.97 | 253.50 | -8.32% | 5,577,101 |
| 2026-02-03 | 276.55 | 284.79 | 266.20 | 276.52 | +2.99% | 3,186,562 |
| 2026-02-02 | 247.93 | 271.21 | 246.03 | 268.49 | +6.62% | 2,534,015 |
| 2026-01-30 | 254.01 | 269.90 | 247.47 | 251.81 | -0.68% | 3,246,929 |
| 2026-01-29 | 257.00 | 259.83 | 241.68 | 253.53 | -1.47% | 2,262,449 |
| 2026-01-28 | 247.52 | 258.43 | 244.74 | 257.30 | +3.95% | 2,072,972 |
| 2026-01-27 | 239.90 | 247.75 | 236.18 | 247.52 | +6.58% | 1,971,261 |
| 2026-01-26 | 230.00 | 242.00 | 225.71 | 232.23 | +1.35% | 1,471,885 |
| 2026-01-23 | 229.16 | 232.03 | 220.52 | 229.14 | -0.39% | 1,806,218 |
| 2026-01-22 | 236.62 | 239.12 | 222.87 | 230.03 | -0.80% | 2,094,952 |
| 2026-01-21 | 241.52 | 242.00 | 226.82 | 231.89 | -3.86% | 2,884,938 |
| 2026-01-20 | 229.15 | 246.21 | 227.37 | 241.21 | -0.91% | 2,738,165 |
| 2026-01-16 | 247.09 | 253.90 | 241.55 | 243.42 | -0.15% | 2,056,229 |
| 2026-01-15 | 245.00 | 252.19 | 243.35 | 243.79 | +2.27% | 1,747,677 |
| 2026-01-14 | 244.91 | 245.80 | 233.17 | 238.38 | -3.26% | 1,776,694 |
| 2026-01-13 | 234.90 | 249.96 | 234.26 | 246.42 | +5.19% | 1,699,219 |
| 2026-01-12 | 227.59 | 234.27 | 223.50 | 234.26 | +1.60% | 2,240,021 |
| 2026-01-09 | 219.28 | 230.86 | 216.07 | 230.56 | +2.38% | 2,772,432 |
| 2026-01-08 | 258.26 | 259.00 | 221.14 | 225.21 | -13.14% | 4,574,054 |
| 2026-01-07 | 253.00 | 261.13 | 248.99 | 259.27 | +2.00% | 3,220,749 |
| 2026-01-06 | 230.20 | 254.81 | 221.12 | 254.19 | +10.09% | 3,456,173 |
| 2026-01-05 | 250.34 | 252.60 | 223.27 | 230.90 | -6.16% | 3,215,877 |
| 2026-01-02 | 241.00 | 248.50 | 237.62 | 246.06 | +5.21% | 1,985,028 |
| 2025-12-31 | 239.08 | 239.90 | 232.41 | 233.87 | -1.88% | 1,170,437 |
| 2025-12-30 | 240.17 | 240.50 | 236.83 | 238.36 | -0.27% | 1,162,997 |
| 2025-12-29 | 237.26 | 241.22 | 230.13 | 239.00 | -1.11% | 1,755,855 |
| 2025-12-26 | 240.90 | 242.51 | 238.43 | 241.68 | +0.58% | 946,948 |
| 2025-12-24 | 240.59 | 242.00 | 237.93 | 240.28 | -0.00% | 833,187 |
| 2025-12-23 | 234.75 | 243.00 | 234.75 | 240.29 | +1.50% | 1,802,104 |
| 2025-12-22 | 235.00 | 239.38 | 230.40 | 236.75 | +2.78% | 2,811,431 |
| 2025-12-19 | 212.74 | 231.35 | 212.41 | 230.34 | +9.32% | 4,528,342 |
| 2025-12-18 | 212.00 | 215.47 | 209.00 | 210.71 | +3.34% | 3,057,063 |
| 2025-12-17 | 212.85 | 215.70 | 201.70 | 203.90 | -2.83% | 2,365,593 |
| 2025-12-16 | 214.46 | 215.44 | 206.54 | 209.84 | -2.93% | 2,727,491 |
| 2025-12-15 | 220.84 | 226.02 | 215.60 | 216.18 | -1.03% | 2,686,549 |
| 2025-12-12 | 236.00 | 237.91 | 215.18 | 218.44 | -9.87% | 4,664,456 |
| 2025-12-11 | 236.35 | 248.00 | 222.45 | 242.37 | +9.25% | 8,607,334 |
| 2025-12-10 | 216.50 | 226.24 | 214.40 | 221.85 | +3.50% | 3,822,244 |
| 2025-12-09 | 212.93 | 219.88 | 212.28 | 214.35 | +0.67% | 3,288,538 |
| 2025-12-08 | 205.00 | 213.03 | 203.00 | 212.93 | +5.56% | 3,774,979 |
| 2025-12-05 | 199.63 | 201.77 | 194.85 | 201.71 | +3.06% | 2,332,252 |
| 2025-12-04 | 190.56 | 197.76 | 190.01 | 195.73 | +1.23% | 2,447,334 |
| 2025-12-03 | 201.00 | 202.22 | 186.39 | 193.35 | -4.52% | 3,809,096 |
| 2025-12-02 | 204.03 | 209.19 | 198.00 | 202.50 | +0.79% | 2,282,793 |
| 2025-12-01 | 194.49 | 201.44 | 192.19 | 200.92 | -1.61% | 2,160,230 |
| 2025-11-28 | 203.80 | 204.59 | 201.00 | 204.21 | +1.96% | 1,262,220 |
| 2025-11-26 | 197.36 | 203.16 | 195.81 | 200.29 | +2.06% | 2,033,251 |
| 2025-11-25 | 191.51 | 196.24 | 187.54 | 196.24 | +0.79% | 2,114,001 |
| 2025-11-24 | 183.05 | 196.51 | 182.18 | 194.70 | +9.22% | 14,026,590 |
| 2025-11-21 | 175.97 | 179.00 | 168.22 | 178.26 | +1.03% | 3,812,615 |
| 2025-11-20 | 198.11 | 202.60 | 175.43 | 176.45 | -6.53% | 3,939,225 |
| 2025-11-19 | 187.93 | 192.35 | 184.67 | 188.78 | +0.95% | 2,725,935 |
| 2025-11-18 | 189.03 | 191.84 | 182.89 | 187.00 | -2.49% | 3,498,822 |
| 2025-11-17 | 190.80 | 196.40 | 188.04 | 191.78 | +0.04% | 3,143,581 |
| 2025-11-14 | 184.05 | 195.91 | 183.08 | 191.71 | -1.29% | 5,734,247 |
| 2025-11-13 | 206.99 | 207.83 | 191.81 | 194.21 | -7.31% | 3,621,692 |
| 2025-11-12 | 209.94 | 211.07 | 206.08 | 209.52 | +1.01% | 2,188,774 |
| 2025-11-11 | 204.53 | 208.25 | 200.75 | 207.43 | -0.63% | 2,880,073 |
| 2025-11-10 | 206.80 | 214.17 | 205.16 | 208.74 | +4.76% | 3,523,332 |
| 2025-11-07 | 193.00 | 201.34 | 190.15 | 199.26 | -1.09% | 3,331,092 |
| 2025-11-06 | 199.41 | 203.40 | 195.25 | 201.46 | +2.89% | 2,830,103 |
| 2025-11-05 | 183.99 | 196.99 | 182.49 | 195.81 | +7.08% | 2,782,498 |
| 2025-11-04 | 182.53 | 188.77 | 177.41 | 182.87 | -3.53% | 3,044,936 |
| 2025-11-03 | 193.34 | 194.41 | 187.93 | 189.56 | -0.19% | 1,725,688 |
| 2025-10-31 | 189.59 | 193.03 | 185.27 | 189.92 | +0.51% | 2,146,200 |
| 2025-10-30 | 188.17 | 193.74 | 186.13 | 188.96 | -0.16% | 1,940,800 |
| 2025-10-29 | 184.70 | 193.12 | 184.50 | 189.27 | +3.40% | 2,589,100 |
| 2025-10-28 | 182.26 | 184.98 | 173.80 | 183.04 | +0.27% | 2,597,000 |
| 2025-10-27 | 182.63 | 186.32 | 180.92 | 182.54 | +1.95% | 1,909,200 |
| 2025-10-24 | 175.83 | 181.05 | 175.59 | 179.05 | +3.75% | 1,851,300 |
| 2025-10-23 | 164.48 | 173.84 | 164.13 | 172.58 | +4.92% | 2,242,000 |
| 2025-10-22 | 170.44 | 173.47 | 159.56 | 164.48 | -3.08% | 3,091,100 |
| 2025-10-21 | 172.81 | 174.08 | 169.11 | 169.71 | -1.97% | 2,083,700 |
| 2025-10-20 | 173.63 | 177.79 | 171.95 | 173.12 | +1.27% | 2,010,800 |
| 2025-10-17 | 169.48 | 173.06 | 165.08 | 170.95 | +0.10% | 1,965,600 |
| 2025-10-16 | 170.43 | 176.88 | 170.05 | 170.78 | +1.23% | 2,615,900 |
| 2025-10-15 | 168.99 | 172.92 | 166.89 | 168.71 | +2.36% | 2,401,800 |
| 2025-10-14 | 161.55 | 167.28 | 159.01 | 164.82 | +0.02% | 1,738,600 |
| 2025-10-13 | 164.00 | 167.34 | 160.10 | 164.78 | +5.67% | 2,884,700 |
| 2025-10-10 | 165.24 | 165.24 | 153.27 | 155.94 | -4.69% | 3,059,300 |
| 2025-10-09 | 158.13 | 164.02 | 157.16 | 163.61 | +2.47% | 2,366,000 |
| 2025-10-08 | 152.70 | 159.85 | 152.54 | 159.66 | +5.40% | 1,981,300 |
| 2025-10-07 | 154.00 | 155.20 | 147.36 | 151.48 | -1.15% | 2,718,500 |
| 2025-10-06 | 152.68 | 159.43 | 151.64 | 153.25 | +1.19% | 3,005,500 |
| 2025-10-03 | 153.55 | 154.01 | 150.27 | 151.45 | -0.79% | 1,762,400 |
| 2025-10-02 | 153.23 | 153.61 | 148.02 | 152.66 | +0.62% | 2,280,200 |
| 2025-10-01 | 144.24 | 151.89 | 143.19 | 151.72 | +4.15% | 3,107,500 |
| 2025-09-30 | 144.52 | 146.53 | 143.76 | 145.67 | +1.08% | 2,088,200 |
| 2025-09-29 | 145.81 | 146.51 | 143.00 | 144.12 | +1.54% | 2,318,600 |
| 2025-09-26 | 140.24 | 143.79 | 138.12 | 141.93 | +3.47% | 3,795,900 |
| 2025-09-25 | 134.51 | 137.61 | 133.67 | 137.17 | -0.90% | 2,808,100 |
| 2025-09-24 | 139.38 | 140.21 | 136.04 | 138.42 | -0.76% | 2,367,300 |
| 2025-09-23 | 139.85 | 141.43 | 138.13 | 139.48 | +0.12% | 2,846,200 |
| 2025-09-22 | 138.06 | 139.44 | 136.33 | 139.31 | +0.68% | 2,613,100 |
| 2025-09-19 | 137.71 | 138.96 | 136.07 | 138.37 | +0.24% | 3,153,500 |
| 2025-09-18 | 138.70 | 139.74 | 137.45 | 138.04 | +1.22% | 2,048,100 |
| 2025-09-17 | 139.55 | 139.55 | 132.93 | 136.38 | -0.80% | 3,196,700 |
| 2025-09-16 | 136.39 | 137.64 | 133.94 | 137.48 | +1.16% | 2,907,000 |
| 2025-09-15 | 132.00 | 138.35 | 131.45 | 135.90 | +3.52% | 3,375,500 |
| 2025-09-12 | 132.22 | 133.28 | 130.13 | 131.28 | -0.92% | 2,778,000 |
| 2025-09-11 | 131.00 | 134.31 | 130.00 | 132.50 | +2.03% | 3,381,100 |
| 2025-09-10 | 123.81 | 131.40 | 123.65 | 129.86 | +6.28% | 3,431,800 |
| 2025-09-09 | 119.00 | 122.27 | 117.94 | 122.19 | +2.68% | 2,131,800 |
| 2025-09-08 | 118.45 | 120.18 | 117.02 | 119.00 | +1.98% | 2,593,300 |
| 2025-09-05 | 115.86 | 117.06 | 113.66 | 116.69 | -0.20% | 4,410,300 |
| 2025-09-04 | 115.00 | 122.00 | 110.90 | 116.92 | +23.31% | 11,296,500 |
| 2025-09-03 | 93.74 | 95.21 | 92.46 | 94.82 | +1.31% | 5,741,200 |
| 2025-09-02 | 92.68 | 93.61 | 90.00 | 93.59 | -0.40% | 2,702,400 |
| 2025-08-29 | 97.25 | 97.55 | 93.47 | 93.97 | -4.00% | 2,230,600 |
| 2025-08-28 | 93.00 | 98.88 | 92.87 | 97.89 | +5.55% | 2,790,400 |
| 2025-08-27 | 91.43 | 94.04 | 91.43 | 92.74 | +1.37% | 1,657,600 |
| 2025-08-26 | 91.09 | 92.52 | 90.65 | 91.49 | +0.83% | 1,187,200 |
| 2025-08-25 | 90.12 | 91.12 | 89.41 | 90.74 | +1.04% | 1,663,800 |
| 2025-08-22 | 87.54 | 90.45 | 87.25 | 89.81 | +2.80% | 1,971,300 |
| 2025-08-21 | 86.34 | 87.63 | 86.00 | 87.36 | +0.83% | 1,496,000 |
| 2025-08-20 | 87.87 | 88.00 | 84.41 | 86.64 | -2.40% | 1,889,700 |
| 2025-08-19 | 91.01 | 91.37 | 88.45 | 88.77 | -3.44% | 1,593,800 |
| 2025-08-18 | 90.46 | 92.21 | 90.10 | 91.93 | +1.17% | 1,077,600 |
| 2025-08-15 | 90.94 | 91.70 | 89.52 | 90.87 | -0.60% | 1,478,800 |
| 2025-08-14 | 92.88 | 93.40 | 89.09 | 91.42 | -3.42% | 2,612,600 |
| 2025-08-13 | 97.00 | 98.19 | 94.08 | 94.66 | -1.80% | 1,547,900 |
| 2025-08-12 | 93.58 | 96.56 | 93.50 | 96.40 | +3.23% | 1,488,500 |
| 2025-08-11 | 94.75 | 95.71 | 93.16 | 93.38 | -1.77% | 1,409,300 |
Most recent 250 sessions, newest first.
Seasonal returns
Best month historically: Sep (+21.47%). Worst month: Jun (-5.88%). Based on 5 years of daily data (2022–2026).
FAQ · from the current price data · as of 2026-08-07
Quick answers
What is Ciena Corp's (CIEN) latest close?
412.39 on 2026-08-07, from the Closelook data lake's daily price record.
What is CIEN's 52-week high and low?
637.51 high and 84.41 low over the trailing 52 weeks, as of 2026-08-07.
What is Ciena Corp's strongest and weakest month historically?
Historically, CIEN's strongest calendar month has been Sep (average +21.47%) and its weakest Jun (average -5.88%), based on 5 years of daily data (2022–2026).
How many years of seasonality does this cover?
5 years (2022–2026), computed from 965 daily bars in the Closelook data lake.