Ciena Corp (CIEN) stock
CIENNYSETelephone & Telegraph ApparatusFiscal year ends October 31
Financials through Q3 FY2026, quarter ended Aug 1, 2026Last filing: 10-Q on Sep 3, 2026Score 12/30116% above fair value
$320.72−28.73 (-8.22%)
Close on Oct 30, 2026Market cap $45.48BP/E 71.6Yield –
Price history
Ciena share prices for every trading day, newest first. Adjusted for stock splits, not for dividends.
Close, Oct 30, 2026
$320.72
-8.22% on the day
52-week range
$168.22 – $637.51
-49.7% from the high
Change over 52 weeks
+69.7%
From $188.96 on Oct 30, 2025
Average volume
2.58M
Shares a day, last 90 sessions
| Date | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 30, 2026 | $326.00 | $332.72 | $313.27 | $320.72 | -8.22% | 3,100,795 |
| Oct 29, 2026 | $348.60 | $361.96 | $340.01 | $349.45 | -3.79% | 2,807,818 |
| Oct 28, 2026 | $357.01 | $368.24 | $351.60 | $363.21 | +3.43% | 2,787,258 |
| Oct 27, 2026 | $344.09 | $353.10 | $336.30 | $351.15 | +4.53% | 2,691,067 |
| Oct 26, 2026 | $324.06 | $345.48 | $318.77 | $335.93 | +4.89% | 2,837,882 |
| Oct 23, 2026 | $325.95 | $327.40 | $313.45 | $320.26 | -0.74% | 1,969,748 |
| Oct 22, 2026 | $343.48 | $346.29 | $320.70 | $322.64 | -10.71% | 3,938,380 |
| Oct 21, 2026 | $354.56 | $363.97 | $349.87 | $361.34 | +5.67% | 3,014,301 |
| Oct 20, 2026 | $336.70 | $350.35 | $328.88 | $341.95 | -0.65% | 1,946,534 |
| Oct 19, 2026 | $348.31 | $354.45 | $338.79 | $344.20 | +3.45% | 3,064,367 |
| Oct 16, 2026 | $350.95 | $354.60 | $330.99 | $332.73 | -6.67% | 3,200,815 |
| Oct 15, 2026 | $342.50 | $357.83 | $333.15 | $356.52 | -0.86% | 3,486,679 |
| Oct 14, 2026 | $393.88 | $393.88 | $356.78 | $359.60 | -10.19% | 3,324,270 |
| Oct 13, 2026 | $393.33 | $401.87 | $381.64 | $400.40 | -1.14% | 2,737,641 |
| Oct 12, 2026 | $443.53 | $445.95 | $400.20 | $405.01 | -9.95% | 3,326,185 |
| Oct 9, 2026 | $436.00 | $454.73 | $424.02 | $449.77 | +5.60% | 3,780,736 |
| Oct 8, 2026 | $436.15 | $443.99 | $421.11 | $425.93 | -4.60% | 3,700,385 |
| Oct 7, 2026 | $428.98 | $448.00 | $422.30 | $446.45 | +0.63% | 3,372,457 |
| Oct 6, 2026 | $393.58 | $446.37 | $392.00 | $443.65 | +13.85% | 6,396,595 |
| Oct 5, 2026 | $393.77 | $397.47 | $382.50 | $389.69 | -0.42% | 2,474,541 |
| Oct 2, 2026 | $385.00 | $395.96 | $377.03 | $391.34 | +3.22% | 2,523,483 |
| Oct 1, 2026 | $355.19 | $381.00 | $350.68 | $379.14 | +7.77% | 2,572,076 |
| Sep 30, 2026 | $354.92 | $359.98 | $340.52 | $351.82 | -0.87% | 2,659,294 |
| Sep 29, 2026 | $350.16 | $356.21 | $344.80 | $354.92 | +3.12% | 2,227,429 |
| Sep 28, 2026 | $352.42 | $356.99 | $339.33 | $344.19 | -3.56% | 1,831,495 |
| Sep 25, 2026 | $363.00 | $366.43 | $355.01 | $356.91 | -0.42% | 1,618,512 |
| Sep 24, 2026 | $350.40 | $363.46 | $346.56 | $358.43 | +0.71% | 1,421,150 |
| Sep 23, 2026 | $368.64 | $369.00 | $351.53 | $355.91 | -3.43% | 1,854,239 |
| Sep 22, 2026 | $364.31 | $376.74 | $363.14 | $368.56 | +0.71% | 2,407,120 |
| Sep 21, 2026 | $365.05 | $367.62 | $356.46 | $365.96 | +4.92% | 2,886,519 |
| Sep 18, 2026 | $355.87 | $358.00 | $338.25 | $348.80 | +1.32% | 4,868,465 |
| Sep 17, 2026 | $350.60 | $375.70 | $341.93 | $344.25 | +1.10% | 3,766,826 |
| Sep 16, 2026 | $350.09 | $375.20 | $327.50 | $340.50 | +1.85% | 3,955,510 |
| Sep 15, 2026 | $324.44 | $335.97 | $320.50 | $334.33 | +4.60% | 2,798,152 |
| Sep 14, 2026 | $326.98 | $332.32 | $318.43 | $319.64 | -8.55% | 2,214,123 |
| Sep 11, 2026 | $336.92 | $355.19 | $336.44 | $349.54 | +4.48% | 1,981,509 |
| Sep 10, 2026 | $333.00 | $348.40 | $328.36 | $334.56 | -1.02% | 2,550,728 |
| Sep 9, 2026 | $341.90 | $348.00 | $337.16 | $338.00 | -0.96% | 1,813,232 |
| Sep 8, 2026 | $327.42 | $349.78 | $325.69 | $341.29 | +6.32% | 3,226,370 |
| Sep 4, 2026 | $321.67 | $328.85 | $315.73 | $321.00 | +1.12% | 3,344,360 |
| Sep 3, 2026 | $354.49 | $358.76 | $311.60 | $317.46 | -10.36% | 7,535,403 |
| Sep 2, 2026 | $357.25 | $359.60 | $348.86 | $354.16 | -1.71% | 2,870,265 |
| Sep 1, 2026 | $376.89 | $381.60 | $356.40 | $360.33 | -5.87% | 2,261,311 |
| Aug 31, 2026 | $378.44 | $382.94 | $370.77 | $382.80 | +1.15% | 1,830,228 |
| Aug 28, 2026 | $400.42 | $400.50 | $376.64 | $378.44 | -5.35% | 1,318,585 |
| Aug 27, 2026 | $411.53 | $418.72 | $395.50 | $399.85 | -1.03% | 1,208,678 |
| Aug 26, 2026 | $387.23 | $406.44 | $387.23 | $404.03 | +4.22% | 1,194,540 |
| Aug 25, 2026 | $386.33 | $388.73 | $378.94 | $387.66 | +4.22% | 1,191,438 |
| Aug 24, 2026 | $386.26 | $386.26 | $362.48 | $371.95 | -6.02% | 1,779,493 |
| Aug 21, 2026 | $396.00 | $403.72 | $382.75 | $395.79 | +0.84% | 1,235,391 |
| Aug 20, 2026 | $400.35 | $404.35 | $389.10 | $392.48 | -1.75% | 1,453,149 |
| Aug 19, 2026 | $415.50 | $415.50 | $392.67 | $399.47 | -1.50% | 1,771,859 |
| Aug 18, 2026 | $421.59 | $427.74 | $391.77 | $405.54 | -8.90% | 3,052,261 |
| Aug 17, 2026 | $438.38 | $458.00 | $427.45 | $445.18 | +3.83% | 2,494,716 |
| Aug 14, 2026 | $441.61 | $446.15 | $422.49 | $428.77 | -3.17% | 2,518,982 |
| Aug 13, 2026 | $430.32 | $462.69 | $427.00 | $442.79 | +2.49% | 2,912,856 |
| Aug 12, 2026 | $414.51 | $446.36 | $409.24 | $432.05 | +11.49% | 3,989,294 |
| Aug 11, 2026 | $388.84 | $394.99 | $384.19 | $387.53 | -0.04% | 1,534,885 |
| Aug 10, 2026 | $420.00 | $420.00 | $387.28 | $387.70 | -5.99% | 2,021,744 |
| Aug 7, 2026 | $411.04 | $420.00 | $396.89 | $412.39 | +2.14% | 1,887,192 |
| Aug 6, 2026 | $396.05 | $419.49 | $390.56 | $403.76 | -1.24% | 1,354,110 |
| Aug 5, 2026 | $408.56 | $424.58 | $399.07 | $408.83 | -0.56% | 1,773,949 |
| Aug 4, 2026 | $419.08 | $427.00 | $405.01 | $411.13 | +5.21% | 2,069,060 |
| Aug 3, 2026 | $365.00 | $391.87 | $355.00 | $390.76 | +3.64% | 1,243,704 |
| Jul 31, 2026 | $393.98 | $401.00 | $374.38 | $377.05 | +1.34% | 1,948,363 |
| Jul 30, 2026 | $359.27 | $373.09 | $355.00 | $372.07 | +12.62% | 2,464,340 |
| Jul 29, 2026 | $349.64 | $350.80 | $323.29 | $330.37 | -5.75% | 2,634,856 |
| Jul 28, 2026 | $354.90 | $357.47 | $328.80 | $350.51 | -7.09% | 4,180,798 |
| Jul 27, 2026 | $388.19 | $388.19 | $360.00 | $377.27 | -3.50% | 1,513,129 |
| Jul 24, 2026 | $401.85 | $408.74 | $386.25 | $390.96 | -4.07% | 1,489,247 |
| Jul 23, 2026 | $394.10 | $415.80 | $394.10 | $407.53 | +2.61% | 1,803,707 |
| Jul 22, 2026 | $396.95 | $411.01 | $396.87 | $397.16 | -2.83% | 1,755,662 |
| Jul 21, 2026 | $397.70 | $412.04 | $396.55 | $408.73 | +7.91% | 2,036,385 |
| Jul 20, 2026 | $375.01 | $394.56 | $375.00 | $378.77 | +1.16% | 1,757,436 |
| Jul 17, 2026 | $370.99 | $388.61 | $359.01 | $374.41 | -3.70% | 3,366,056 |
| Jul 16, 2026 | $404.79 | $410.31 | $386.65 | $388.81 | -7.09% | 2,602,476 |
| Jul 15, 2026 | $451.01 | $451.01 | $404.40 | $418.46 | -6.37% | 1,655,773 |
| Jul 14, 2026 | $460.88 | $466.66 | $446.25 | $446.93 | +0.33% | 1,247,171 |
| Jul 13, 2026 | $448.67 | $461.45 | $440.51 | $445.44 | -3.32% | 1,220,453 |
| Jul 10, 2026 | $453.00 | $464.42 | $450.00 | $460.72 | -0.35% | 1,283,347 |
| Jul 9, 2026 | $460.60 | $485.69 | $459.81 | $462.34 | +4.85% | 2,045,421 |
| Jul 8, 2026 | $419.22 | $442.14 | $415.70 | $440.97 | +5.27% | 1,826,215 |
| Jul 7, 2026 | $418.77 | $425.96 | $404.43 | $418.91 | -3.44% | 1,815,721 |
| Jul 6, 2026 | $426.99 | $446.40 | $422.30 | $433.83 | +2.69% | 1,329,637 |
| Jul 2, 2026 | $454.16 | $459.73 | $414.17 | $422.46 | -8.65% | 2,155,633 |
| Jul 1, 2026 | $466.20 | $482.16 | $459.23 | $462.44 | -5.73% | 2,042,939 |
| Jun 30, 2026 | $478.93 | $491.79 | $472.59 | $490.56 | +2.43% | 2,445,463 |
| Jun 29, 2026 | $476.10 | $482.46 | $435.12 | $478.93 | -0.12% | 4,074,918 |
| Jun 26, 2026 | $466.33 | $493.26 | $457.70 | $479.50 | -1.07% | 8,736,146 |
| Jun 25, 2026 | $477.42 | $494.53 | $451.56 | $484.69 | +4.57% | 3,558,877 |
| Jun 24, 2026 | $449.36 | $480.59 | $440.70 | $463.51 | +0.80% | 2,801,981 |
| Jun 23, 2026 | $437.00 | $467.89 | $432.49 | $459.85 | -0.10% | 3,816,527 |
| Jun 22, 2026 | $437.83 | $461.50 | $430.51 | $460.33 | +7.50% | 3,863,828 |
| Jun 18, 2026 | $450.80 | $451.60 | $425.08 | $428.22 | -1.95% | 4,297,293 |
| Jun 17, 2026 | $433.00 | $449.00 | $424.33 | $436.72 | +1.49% | 2,883,827 |
| Jun 16, 2026 | $458.73 | $463.55 | $426.62 | $430.30 | -7.14% | 4,210,629 |
| Jun 15, 2026 | $469.95 | $479.51 | $447.63 | $463.41 | +3.91% | 3,955,900 |
| Jun 12, 2026 | $445.22 | $458.47 | $440.71 | $445.98 | +0.17% | 2,665,183 |
| Jun 11, 2026 | $441.66 | $451.10 | $430.82 | $445.22 | +2.43% | 3,000,405 |
| Jun 10, 2026 | $442.00 | $450.78 | $424.45 | $434.65 | -1.07% | 3,869,932 |
| Jun 9, 2026 | $465.91 | $467.60 | $417.34 | $439.34 | -5.86% | 7,863,859 |
| Jun 8, 2026 | $489.78 | $493.09 | $457.79 | $466.67 | -4.41% | 5,635,282 |
| Jun 5, 2026 | $512.31 | $525.15 | $488.14 | $488.21 | -8.85% | 4,195,421 |
| Jun 4, 2026 | $552.39 | $552.39 | $491.00 | $535.63 | -13.66% | 7,611,820 |
| Jun 3, 2026 | $628.51 | $637.51 | $609.79 | $620.37 | -1.06% | 2,654,015 |
| Jun 2, 2026 | $583.58 | $629.61 | $581.63 | $627.00 | +10.08% | 2,725,851 |
| Jun 1, 2026 | $559.52 | $579.97 | $552.59 | $569.61 | -1.83% | 2,894,237 |
| May 29, 2026 | $566.02 | $582.47 | $539.57 | $580.23 | +1.76% | 3,865,952 |
| May 28, 2026 | $598.80 | $604.43 | $561.30 | $570.18 | -2.04% | 1,821,600 |
| May 27, 2026 | $605.54 | $605.54 | $576.88 | $582.08 | -3.37% | 1,754,896 |
| May 26, 2026 | $591.00 | $605.61 | $575.51 | $602.39 | +3.19% | 1,410,999 |
| May 22, 2026 | $599.00 | $599.50 | $574.03 | $583.74 | -0.59% | 1,622,005 |
| May 21, 2026 | $557.00 | $590.13 | $555.71 | $587.23 | +5.85% | 1,548,472 |
| May 20, 2026 | $554.21 | $572.39 | $545.10 | $554.76 | +2.37% | 1,985,867 |
| May 19, 2026 | $514.04 | $542.92 | $499.01 | $541.92 | +3.32% | 2,331,485 |
| May 18, 2026 | $563.49 | $567.08 | $516.61 | $524.53 | -5.40% | 2,502,785 |
| May 15, 2026 | $570.65 | $574.20 | $553.30 | $554.46 | -6.27% | 2,423,358 |
| May 14, 2026 | $577.90 | $591.57 | $566.00 | $591.57 | +2.37% | 1,121,895 |
| May 13, 2026 | $594.00 | $598.84 | $562.50 | $577.90 | +0.13% | 1,272,676 |
| May 12, 2026 | $567.78 | $582.00 | $546.98 | $577.15 | -0.74% | 1,603,667 |
| May 11, 2026 | $558.00 | $593.00 | $550.49 | $581.47 | +6.09% | 2,380,716 |
| May 8, 2026 | $549.00 | $564.83 | $538.77 | $548.11 | +1.74% | 1,501,585 |
| May 7, 2026 | $564.39 | $569.00 | $515.49 | $538.76 | -6.59% | 3,546,930 |
| May 6, 2026 | $563.00 | $583.78 | $550.06 | $576.79 | +5.88% | 2,244,799 |
| May 5, 2026 | $553.63 | $562.00 | $539.43 | $544.75 | +1.16% | 1,632,380 |
| May 4, 2026 | $540.00 | $548.20 | $528.36 | $538.51 | +0.60% | 1,198,633 |
| May 1, 2026 | $527.25 | $550.00 | $518.58 | $535.29 | +1.46% | 1,733,825 |
| Apr 30, 2026 | $487.97 | $529.89 | $486.25 | $527.58 | +10.98% | 2,665,450 |
| Apr 29, 2026 | $480.14 | $482.54 | $468.31 | $475.39 | +0.36% | 1,830,424 |
| Apr 28, 2026 | $485.00 | $493.31 | $461.07 | $473.69 | -6.45% | 3,103,069 |
| Apr 27, 2026 | $515.82 | $516.34 | $485.00 | $506.34 | -2.78% | 1,684,236 |
| Apr 24, 2026 | $514.82 | $527.50 | $505.55 | $520.80 | +0.96% | 1,418,284 |
| Apr 23, 2026 | $505.00 | $527.86 | $497.09 | $515.85 | +3.38% | 2,281,939 |
| Apr 22, 2026 | $511.50 | $518.15 | $467.19 | $498.97 | -1.38% | 2,778,042 |
| Apr 21, 2026 | $507.77 | $522.50 | $493.54 | $505.93 | +0.53% | 1,805,652 |
| Apr 20, 2026 | $512.00 | $517.88 | $497.62 | $503.27 | -0.82% | 1,963,473 |
| Apr 17, 2026 | $500.47 | $513.83 | $495.17 | $507.43 | +2.48% | 1,926,270 |
| Apr 16, 2026 | $476.75 | $495.40 | $462.00 | $495.17 | +4.08% | 2,298,719 |
| Apr 15, 2026 | $471.78 | $481.28 | $454.34 | $475.76 | +1.83% | 3,041,125 |
| Apr 14, 2026 | $486.75 | $487.74 | $458.01 | $467.19 | -2.65% | 3,429,530 |
| Apr 13, 2026 | $493.44 | $494.60 | $472.32 | $479.90 | -3.25% | 3,048,391 |
| Apr 10, 2026 | $498.11 | $508.64 | $475.22 | $496.02 | +1.77% | 2,498,395 |
| Apr 9, 2026 | $498.91 | $513.49 | $473.73 | $487.38 | -1.34% | 3,280,367 |
| Apr 8, 2026 | $475.50 | $499.39 | $471.66 | $494.01 | +10.30% | 4,110,400 |
| Apr 7, 2026 | $435.28 | $449.34 | $421.30 | $447.88 | +3.14% | 1,969,528 |
| Apr 6, 2026 | $455.45 | $459.80 | $432.77 | $434.26 | -3.02% | 1,939,070 |
| Apr 2, 2026 | $400.98 | $453.00 | $400.00 | $447.76 | +7.79% | 3,617,746 |
| Apr 1, 2026 | $401.71 | $421.99 | $399.82 | $415.39 | +7.00% | 2,677,105 |
| Mar 31, 2026 | $373.77 | $388.72 | $364.16 | $388.23 | +6.36% | 3,020,976 |
| Mar 30, 2026 | $411.00 | $414.75 | $361.70 | $365.00 | -9.12% | 3,512,374 |
| Mar 27, 2026 | $394.82 | $411.50 | $391.36 | $401.61 | +3.51% | 2,518,013 |
| Mar 26, 2026 | $428.47 | $428.74 | $387.40 | $387.99 | -11.36% | 3,719,886 |
| Mar 25, 2026 | $431.51 | $446.89 | $423.88 | $437.70 | +1.94% | 2,670,787 |
| Mar 24, 2026 | $405.00 | $434.22 | $405.00 | $429.38 | +5.27% | 3,382,007 |
| Mar 23, 2026 | $399.40 | $415.57 | $393.96 | $407.90 | +6.25% | 3,544,005 |
| Mar 20, 2026 | $416.00 | $419.80 | $380.11 | $383.89 | -6.95% | 5,809,564 |
| Mar 19, 2026 | $373.12 | $416.76 | $371.00 | $412.58 | +7.09% | 3,934,558 |
| Mar 18, 2026 | $376.00 | $402.17 | $376.00 | $385.26 | +4.11% | 4,159,451 |
| Mar 17, 2026 | $358.31 | $379.42 | $350.36 | $370.05 | +1.70% | 3,263,987 |
| Mar 16, 2026 | $345.00 | $367.45 | $344.99 | $363.88 | +7.85% | 3,759,723 |
| Mar 13, 2026 | $339.22 | $353.25 | $334.50 | $337.38 | +0.16% | 2,425,790 |
| Mar 12, 2026 | $344.26 | $350.33 | $329.41 | $336.83 | -0.92% | 2,641,061 |
| Mar 11, 2026 | $333.89 | $346.06 | $329.58 | $339.95 | +0.77% | 2,063,731 |
| Mar 10, 2026 | $325.00 | $349.77 | $325.00 | $337.36 | +5.91% | 3,020,891 |
| Mar 9, 2026 | $289.49 | $319.29 | $287.25 | $318.54 | +8.28% | 3,070,255 |
| Mar 6, 2026 | $294.81 | $315.84 | $293.11 | $294.17 | -1.71% | 3,924,162 |
| Mar 5, 2026 | $312.01 | $315.50 | $278.39 | $299.30 | -12.88% | 7,851,824 |
| Mar 4, 2026 | $339.19 | $353.78 | $335.00 | $343.55 | +3.15% | 2,708,630 |
| Mar 3, 2026 | $339.57 | $340.69 | $320.32 | $333.07 | -5.84% | 3,014,089 |
| Mar 2, 2026 | $353.76 | $364.05 | $345.06 | $353.73 | +1.44% | 2,527,510 |
| Feb 27, 2026 | $340.66 | $353.57 | $337.11 | $348.70 | +2.21% | 3,083,021 |
| Feb 26, 2026 | $354.59 | $358.63 | $326.76 | $341.16 | -3.44% | 2,612,883 |
| Feb 25, 2026 | $345.99 | $365.90 | $345.68 | $353.33 | +3.10% | 2,348,344 |
| Feb 24, 2026 | $341.00 | $348.28 | $334.91 | $342.70 | -0.62% | 2,270,180 |
| Feb 23, 2026 | $332.86 | $346.55 | $330.20 | $344.84 | +2.95% | 2,197,402 |
| Feb 20, 2026 | $317.04 | $340.27 | $314.69 | $334.95 | +5.19% | 2,527,668 |
| Feb 19, 2026 | $308.88 | $320.42 | $303.55 | $318.41 | +2.40% | 2,389,495 |
| Feb 18, 2026 | $302.72 | $317.28 | $299.96 | $310.96 | +2.85% | 2,223,837 |
| Feb 17, 2026 | $297.91 | $307.63 | $286.81 | $302.33 | -0.52% | 2,182,171 |
| Feb 13, 2026 | $293.83 | $304.18 | $270.00 | $303.92 | +3.74% | 3,088,177 |
| Feb 12, 2026 | $300.00 | $305.00 | $284.15 | $292.96 | -1.44% | 2,871,527 |
| Feb 11, 2026 | $307.28 | $308.81 | $286.55 | $297.25 | -0.49% | 3,525,878 |
| Feb 10, 2026 | $288.08 | $298.99 | $280.04 | $298.70 | +3.11% | 2,274,468 |
| Feb 9, 2026 | $270.70 | $297.01 | $266.61 | $289.68 | +6.77% | 4,303,788 |
| Feb 6, 2026 | $262.65 | $273.00 | $251.26 | $271.32 | +7.25% | 33,471,360 |
| Feb 5, 2026 | $242.64 | $261.00 | $238.57 | $252.98 | -0.21% | 3,316,187 |
| Feb 4, 2026 | $277.05 | $285.97 | $248.97 | $253.50 | -8.32% | 5,577,101 |
| Feb 3, 2026 | $276.55 | $284.79 | $266.20 | $276.52 | +2.99% | 3,186,562 |
| Feb 2, 2026 | $247.93 | $271.21 | $246.03 | $268.49 | +6.62% | 2,534,015 |
| Jan 30, 2026 | $254.01 | $269.90 | $247.47 | $251.81 | -0.68% | 3,246,929 |
| Jan 29, 2026 | $257.00 | $259.83 | $241.68 | $253.53 | -1.47% | 2,262,449 |
| Jan 28, 2026 | $247.52 | $258.43 | $244.74 | $257.30 | +3.95% | 2,072,972 |
| Jan 27, 2026 | $239.90 | $247.75 | $236.18 | $247.52 | +6.58% | 1,971,261 |
| Jan 26, 2026 | $230.00 | $242.00 | $225.71 | $232.23 | +1.35% | 1,471,885 |
| Jan 23, 2026 | $229.16 | $232.03 | $220.52 | $229.14 | -0.39% | 1,806,218 |
| Jan 22, 2026 | $236.62 | $239.12 | $222.87 | $230.03 | -0.80% | 2,094,952 |
| Jan 21, 2026 | $241.52 | $242.00 | $226.82 | $231.89 | -3.86% | 2,884,938 |
| Jan 20, 2026 | $229.15 | $246.21 | $227.37 | $241.21 | -0.91% | 2,738,165 |
| Jan 16, 2026 | $247.09 | $253.90 | $241.55 | $243.42 | -0.15% | 2,056,229 |
| Jan 15, 2026 | $245.00 | $252.20 | $243.35 | $243.79 | +2.27% | 1,747,677 |
| Jan 14, 2026 | $244.91 | $245.80 | $233.17 | $238.38 | -3.26% | 1,776,694 |
| Jan 13, 2026 | $234.90 | $249.96 | $234.26 | $246.42 | +5.19% | 1,699,219 |
| Jan 12, 2026 | $227.59 | $234.27 | $223.50 | $234.26 | +1.60% | 2,240,021 |
| Jan 9, 2026 | $219.28 | $230.86 | $216.07 | $230.56 | +2.38% | 2,772,432 |
| Jan 8, 2026 | $258.26 | $259.00 | $221.14 | $225.21 | -13.14% | 4,574,054 |
| Jan 7, 2026 | $253.00 | $261.13 | $248.99 | $259.27 | +2.00% | 3,220,749 |
| Jan 6, 2026 | $230.20 | $254.82 | $221.12 | $254.19 | +10.09% | 3,456,173 |
| Jan 5, 2026 | $250.34 | $252.60 | $223.27 | $230.90 | -6.16% | 3,215,877 |
| Jan 2, 2026 | $241.00 | $248.50 | $237.62 | $246.06 | +5.21% | 1,985,028 |
| Dec 31, 2025 | $239.08 | $239.90 | $232.41 | $233.87 | -1.88% | 1,170,437 |
| Dec 30, 2025 | $240.17 | $240.50 | $236.83 | $238.36 | -0.27% | 1,162,997 |
| Dec 29, 2025 | $237.26 | $241.23 | $230.13 | $239.00 | -1.11% | 1,755,855 |
| Dec 26, 2025 | $240.90 | $242.51 | $238.43 | $241.68 | +0.58% | 946,948 |
| Dec 24, 2025 | $240.59 | $242.00 | $237.93 | $240.28 | -0.00% | 833,187 |
| Dec 23, 2025 | $234.75 | $243.00 | $234.75 | $240.29 | +1.50% | 1,802,104 |
| Dec 22, 2025 | $235.00 | $239.38 | $230.40 | $236.75 | +2.78% | 2,811,431 |
| Dec 19, 2025 | $212.74 | $231.35 | $212.42 | $230.34 | +9.32% | 4,528,342 |
| Dec 18, 2025 | $212.00 | $215.47 | $209.00 | $210.71 | +3.34% | 3,057,063 |
| Dec 17, 2025 | $212.85 | $215.70 | $201.70 | $203.90 | -2.83% | 2,365,593 |
| Dec 16, 2025 | $214.46 | $215.44 | $206.54 | $209.84 | -2.93% | 2,727,491 |
| Dec 15, 2025 | $220.84 | $226.02 | $215.60 | $216.18 | -1.03% | 2,686,549 |
| Dec 12, 2025 | $236.00 | $237.91 | $215.18 | $218.44 | -9.87% | 4,664,456 |
| Dec 11, 2025 | $236.35 | $248.00 | $222.45 | $242.37 | +9.25% | 8,607,334 |
| Dec 10, 2025 | $216.50 | $226.24 | $214.40 | $221.85 | +3.50% | 3,822,244 |
| Dec 9, 2025 | $212.93 | $219.88 | $212.28 | $214.35 | +0.67% | 3,288,538 |
| Dec 8, 2025 | $205.00 | $213.03 | $203.00 | $212.93 | +5.56% | 3,774,979 |
| Dec 5, 2025 | $199.63 | $201.77 | $194.85 | $201.71 | +3.06% | 2,332,252 |
| Dec 4, 2025 | $190.56 | $197.76 | $190.01 | $195.73 | +1.23% | 2,447,334 |
| Dec 3, 2025 | $201.00 | $202.22 | $186.39 | $193.35 | -4.52% | 3,809,096 |
| Dec 2, 2025 | $204.03 | $209.19 | $198.01 | $202.50 | +0.79% | 2,282,793 |
| Dec 1, 2025 | $194.49 | $201.44 | $192.20 | $200.92 | -1.61% | 2,303,788 |
| Nov 28, 2025 | $203.80 | $204.59 | $201.00 | $204.21 | +1.96% | 1,262,367 |
| Nov 26, 2025 | $197.36 | $203.17 | $195.82 | $200.29 | +2.06% | 2,033,251 |
| Nov 25, 2025 | $191.51 | $196.24 | $187.55 | $196.24 | +0.79% | 2,114,001 |
| Nov 24, 2025 | $183.05 | $196.52 | $182.18 | $194.70 | +9.22% | 14,026,590 |
| Nov 21, 2025 | $175.97 | $179.00 | $168.22 | $178.26 | +1.03% | 3,812,615 |
| Nov 20, 2025 | $198.11 | $202.60 | $175.43 | $176.45 | -6.53% | 3,939,225 |
| Nov 19, 2025 | $187.93 | $192.35 | $184.67 | $188.78 | +0.95% | 2,725,935 |
| Nov 18, 2025 | $189.03 | $191.84 | $182.89 | $187.00 | -2.49% | 3,498,822 |
| Nov 17, 2025 | $190.80 | $196.40 | $188.04 | $191.78 | +0.04% | 3,143,581 |
| Nov 14, 2025 | $184.05 | $195.91 | $183.08 | $191.71 | -1.29% | 5,734,247 |
| Nov 13, 2025 | $206.99 | $207.83 | $191.81 | $194.21 | -7.31% | 3,621,692 |
| Nov 12, 2025 | $209.94 | $211.07 | $206.08 | $209.52 | +1.01% | 2,188,774 |
| Nov 11, 2025 | $204.53 | $208.25 | $200.75 | $207.43 | -0.63% | 2,880,073 |
| Nov 10, 2025 | $206.80 | $214.17 | $205.16 | $208.74 | +4.76% | 3,523,332 |
| Nov 7, 2025 | $193.00 | $201.34 | $190.15 | $199.26 | -1.09% | 3,331,092 |
| Nov 6, 2025 | $199.41 | $203.40 | $195.25 | $201.46 | +2.89% | 2,830,103 |
| Nov 5, 2025 | $183.99 | $196.99 | $182.49 | $195.81 | +7.08% | 2,782,498 |
| Nov 4, 2025 | $182.53 | $188.77 | $177.41 | $182.87 | -3.53% | 3,044,936 |
| Nov 3, 2025 | $193.34 | $194.41 | $187.93 | $189.56 | -0.19% | 1,725,688 |
| Oct 31, 2025 | $189.59 | $193.03 | $185.27 | $189.92 | +0.51% | 2,146,403 |
| Oct 30, 2025 | $188.17 | $193.74 | $186.13 | $188.96 | -0.16% | 1,940,986 |
| Oct 29, 2025 | $184.70 | $193.12 | $184.50 | $189.27 | +3.40% | 2,589,072 |
| Oct 28, 2025 | $182.26 | $184.98 | $173.80 | $183.04 | +0.27% | 2,597,271 |
| Oct 27, 2025 | $182.63 | $186.32 | $180.92 | $182.54 | +1.95% | 1,909,546 |
| Oct 24, 2025 | $175.83 | $181.05 | $175.59 | $179.05 | +3.75% | 1,851,416 |
| Oct 23, 2025 | $164.48 | $173.84 | $164.13 | $172.58 | +4.92% | 2,242,312 |
| Oct 22, 2025 | $170.44 | $173.47 | $159.56 | $164.48 | -3.08% | 3,091,089 |
| Oct 21, 2025 | $172.81 | $174.08 | $169.11 | $169.71 | -1.97% | 2,083,714 |
| Oct 20, 2025 | $173.63 | $177.79 | $171.95 | $173.12 | – | 2,011,113 |
Seasonality
CIEN return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average | 2.6% | 5.5% | -3.1% | 2.7% | 3.4% | 1.2% | 3.3% | 2.1% | -1.6% | 2.9% | 5.9% | 11.8% |
| Months up | 7 of 10 | 6 of 10 | 5 of 10 | 4 of 10 | 7 of 10 | 6 of 10 | 7 of 10 | 5 of 10 | 3 of 10 | 5 of 10 | 8 of 9 | 7 of 9 |
| 2026 | 7.7% | 38.5% | 11.3% | 35.9% | 10.0% | -15.5% | -23.1% | 1.5% | -8.1% | -8.8% | ||
| 2025 | 2.7% | -8.7% | -24.1% | 11.1% | 19.2% | 1.6% | 14.2% | 1.2% | 55.0% | 30.4% | 7.5% | 14.5% |
| 2024 | 17.8% | 7.5% | -13.2% | -6.5% | 4.2% | 0.0% | 9.5% | 9.3% | 6.8% | 3.1% | 9.8% | 21.6% |
| 2023 | 2.0% | -7.3% | 8.9% | -12.3% | 1.5% | -9.1% | -0.7% | 18.4% | -5.4% | -10.7% | 8.6% | -1.8% |
| 2022 | -13.8% | 3.2% | -11.4% | -9.0% | -7.9% | -10.1% | 12.9% | -1.7% | -20.3% | 18.5% | -6.1% | 13.4% |
| 2021 | 1.0% | -2.3% | 4.9% | -7.8% | 4.8% | 7.6% | 2.2% | -1.7% | -10.1% | 5.7% | 10.9% | 27.8% |
| 2020 | -4.7% | -5.5% | 3.5% | 16.2% | 19.5% | -2.0% | 9.9% | -4.6% | -30.1% | -0.8% | 13.7% | 18.0% |
| 2019 | 12.3% | 12.0% | -12.5% | 2.7% | -8.9% | 17.7% | 9.9% | -9.5% | -4.2% | -5.4% | 2.3% | 12.5% |
| 2018 | 1.7% | 8.9% | 11.8% | -0.6% | -10.5% | 15.0% | -4.2% | 24.3% | -1.1% | 0.1% | 4.4% | 4.0% |
| 2017 | -0.3% | 8.2% | -10.4% | -3.0% | 2.5% | 6.6% | 2.9% | -16.1% | 1.7% | -3.2% | 2.3% | -3.8% |