Ciena (CIEN) Market Cap 1997–2025

As of December 12, 2025, Ciena had a market cap of $30.820 billion, which decreased by 9.86% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Dec 12, 2025, 4:00 PM ET

Ciena Corp. (CIEN)

🌍 United States 📈 NYSE 🏭 Technology 🏢 Communications Equipment

Latest Market Cap

$30.820B ▼ 9.86%

Jan 1, 2025

$12.053B ▲ 155.70%

1 Year Ago

$12.751B ▲ 141.71%

All-Time High

$42.477B ▼ 27.44%

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Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.

📈 Ciena Market Cap History by Year and Month

Ciena Market Cap History by Year and Month
Year / Month	Market Cap	% Change
2025	$30.820B	▲ 155.70%
December 12, 2025	$30.820B	▲ 6.98%
November 28, 2025	$28.810B	▲ 7.54%
October 31, 2025	$26.790B	▲ 30.36%
September 30, 2025	$20.550B	▲ 54.74%
August 29, 2025	$13.280B	▲ 1.22%
July 31, 2025	$13.120B	▲ 14.09%
June 30, 2025	$11.500B	▲ 1.59%
May 30, 2025	$11.320B	▲ 18.57%
April 30, 2025	$9.547B	▲ 11.14%
March 31, 2025	$8.590B	▼ 24.25%
February 28, 2025	$11.340B	▼ 8.77%
January 31, 2025	$12.430B	▲ 3.13%
2024	$12.053B	▲ 84.89%
December 31, 2024	$12.053B	▲ 21.18%
November 29, 2024	$9.946B	▲ 8.43%
October 31, 2024	$9.173B	▲ 3.13%
September 30, 2024	$8.895B	▲ 6.83%
August 30, 2024	$8.326B	▲ 9.31%
July 31, 2024	$7.617B	▲ 10.02%
June 28, 2024	$6.923B	▲ 0.01%
May 31, 2024	$6.922B	▲ 3.84%
April 30, 2024	$6.666B	▼ 6.77%
March 28, 2024	$7.150B	▼ 13.43%
February 29, 2024	$8.259B	▲ 7.51%
January 31, 2024	$7.682B	▲ 17.84%
2023	$6.519B	▼ 13.84%
December 29, 2023	$6.519B	▼ 1.82%
November 30, 2023	$6.640B	▲ 8.64%
October 31, 2023	$6.112B	▼ 12.52%
September 29, 2023	$6.987B	▼ 6.04%
August 31, 2023	$7.436B	▲ 18.45%
July 31, 2023	$6.278B	▼ 1.16%
June 30, 2023	$6.352B	▼ 9.10%
May 31, 2023	$6.988B	▲ 1.76%
April 28, 2023	$6.867B	▼ 12.34%
March 31, 2023	$7.834B	▲ 8.93%
February 28, 2023	$7.192B	▼ 7.31%
January 31, 2023	$7.759B	▲ 2.55%
2022	$7.566B	▼ 36.53%
December 30, 2022	$7.566B	▲ 13.38%
November 30, 2022	$6.673B	▼ 6.13%
October 31, 2022	$7.109B	▲ 18.70%
September 30, 2022	$5.989B	▼ 20.40%
August 31, 2022	$7.524B	▼ 2.60%
July 29, 2022	$7.725B	▲ 12.92%
June 30, 2022	$6.841B	▼ 10.77%
May 31, 2022	$7.667B	▼ 8.65%
April 29, 2022	$8.393B	▼ 9.01%
March 31, 2022	$9.224B	▼ 11.89%
February 28, 2022	$10.469B	▲ 3.19%
January 31, 2022	$10.145B	▼ 14.90%
2021	$11.921B	▲ 45.95%
December 31, 2021	$11.921B	▲ 27.81%
November 30, 2021	$9.327B	▲ 10.89%
October 29, 2021	$8.411B	▲ 5.72%
September 30, 2021	$7.956B	▼ 10.21%
August 31, 2021	$8.861B	▼ 1.52%
July 30, 2021	$8.998B	▲ 2.19%
June 30, 2021	$8.805B	▲ 7.47%
May 28, 2021	$8.193B	▲ 4.73%
April 30, 2021	$7.823B	▼ 7.77%
March 31, 2021	$8.482B	▲ 4.78%
February 26, 2021	$8.095B	▼ 1.90%
January 29, 2021	$8.252B	▲ 1.03%
2020	$8.168B	▲ 24.21%
December 31, 2020	$8.168B	▲ 17.97%
November 30, 2020	$6.924B	▲ 13.90%
October 30, 2020	$6.079B	▼ 0.75%
September 30, 2020	$6.125B	▼ 30.09%
August 31, 2020	$8.761B	▼ 4.18%
July 31, 2020	$9.143B	▲ 9.88%
June 30, 2020	$8.321B	▼ 1.99%
May 29, 2020	$8.490B	▲ 19.59%
April 30, 2020	$7.099B	▲ 16.17%
March 31, 2020	$6.111B	▲ 3.26%
February 28, 2020	$5.918B	▼ 5.48%
January 31, 2020	$6.261B	▼ 4.79%
2019	$6.576B	▲ 23.94%
December 31, 2019	$6.576B	▲ 12.20%
November 29, 2019	$5.861B	▲ 2.27%
October 31, 2019	$5.731B	▼ 5.57%
September 30, 2019	$6.069B	▼ 4.41%
August 30, 2019	$6.349B	▼ 9.48%
July 31, 2019	$7.014B	▲ 9.95%
June 28, 2019	$6.379B	▲ 17.35%
May 31, 2019	$5.436B	▼ 8.91%
April 30, 2019	$5.968B	▲ 2.49%
March 29, 2019	$5.823B	▼ 12.69%
February 28, 2019	$6.669B	▲ 11.99%
January 31, 2019	$5.955B	▲ 12.23%
2018	$5.306B	▲ 76.45%
December 31, 2018	$5.306B	▲ 5.40%
November 30, 2018	$5.034B	▲ 4.35%
October 31, 2018	$4.824B	▲ 8.28%
September 28, 2018	$4.455B	▼ 1.07%
August 31, 2018	$4.503B	▲ 23.95%
July 31, 2018	$3.633B	▼ 4.04%
June 29, 2018	$3.786B	▲ 14.52%
May 31, 2018	$3.306B	▼ 10.48%
April 30, 2018	$3.693B	▼ 0.70%
March 29, 2018	$3.719B	▲ 11.51%
February 28, 2018	$3.335B	▲ 8.70%
January 31, 2018	$3.068B	▲ 2.03%
2017	$3.007B	▼ 12.26%
December 29, 2017	$3.007B	▼ 3.34%
November 30, 2017	$3.111B	▲ 2.27%
October 31, 2017	$3.042B	▼ 2.97%
September 29, 2017	$3.135B	▲ 1.69%
August 31, 2017	$3.083B	▼ 16.09%
July 31, 2017	$3.674B	▲ 2.91%
June 30, 2017	$3.570B	▲ 7.24%
May 31, 2017	$3.329B	▲ 2.81%
April 28, 2017	$3.238B	▼ 2.97%
March 31, 2017	$3.337B	▼ 10.32%
February 28, 2017	$3.721B	▲ 8.23%
January 31, 2017	$3.438B	▲ 0.32%
2016	$3.427B	▲ 22.00%
December 30, 2016	$3.427B	▲ 14.31%
November 30, 2016	$2.998B	▲ 10.67%
October 31, 2016	$2.709B	▼ 10.83%
September 30, 2016	$3.038B	▲ 1.71%
August 31, 2016	$2.987B	▲ 12.67%
July 29, 2016	$2.651B	▲ 2.36%
June 30, 2016	$2.590B	▲ 7.47%
May 31, 2016	$2.410B	▲ 4.10%
April 29, 2016	$2.315B	▼ 11.51%
March 31, 2016	$2.616B	▼ 7.17%
February 29, 2016	$2.818B	▲ 15.40%
January 29, 2016	$2.442B	▼ 13.07%
2015	$2.809B	▲ 35.24%
December 31, 2015	$2.809B	▼ 17.29%
November 30, 2015	$3.396B	▲ 4.40%
October 30, 2015	$3.253B	▲ 16.51%
September 30, 2015	$2.792B	▲ 5.16%
August 31, 2015	$2.655B	▼ 12.14%
July 31, 2015	$3.022B	▲ 8.39%
June 30, 2015	$2.788B	▲ 8.06%
May 29, 2015	$2.580B	▲ 11.88%
April 30, 2015	$2.306B	▲ 10.28%
March 31, 2015	$2.091B	▼ 7.68%
February 27, 2015	$2.265B	▲ 12.97%
January 30, 2015	$2.005B	▼ 3.47%
2014	$2.077B	▼ 16.32%
December 31, 2014	$2.077B	▲ 17.48%
November 28, 2014	$1.768B	▼ 1.39%
October 31, 2014	$1.793B	▲ 0.62%
September 30, 2014	$1.782B	▼ 19.18%
August 29, 2014	$2.205B	▲ 5.96%
July 31, 2014	$2.081B	▼ 9.01%
June 30, 2014	$2.287B	▲ 11.67%
May 30, 2014	$2.048B	▼ 1.87%
April 30, 2014	$2.087B	▼ 12.60%
March 31, 2014	$2.388B	▼ 7.48%
February 28, 2014	$2.581B	▲ 6.65%
January 31, 2014	$2.420B	▼ 2.50%
2013	$2.482B	▲ 57.09%
December 31, 2013	$2.482B	▲ 11.10%
November 29, 2013	$2.234B	▼ 4.57%
October 31, 2013	$2.341B	▼ 9.23%
September 30, 2013	$2.579B	▲ 25.56%
August 30, 2013	$2.054B	▼ 9.71%
July 31, 2013	$2.275B	▲ 14.73%
June 28, 2013	$1.983B	▲ 16.10%
May 31, 2013	$1.708B	▲ 11.85%
April 30, 2013	$1.527B	▼ 6.03%
March 28, 2013	$1.625B	▲ 5.04%
February 28, 2013	$1.547B	▼ 2.70%
January 31, 2013	$1.590B	▲ 0.63%
2012	$1.580B	▲ 34.01%
December 31, 2012	$1.580B	▲ 5.54%
November 30, 2012	$1.497B	▲ 19.86%
October 31, 2012	$1.249B	▼ 8.30%
September 28, 2012	$1.362B	▼ 0.58%
August 31, 2012	$1.370B	▼ 12.29%
July 31, 2012	$1.562B	▼ 3.76%
June 29, 2012	$1.623B	▲ 20.85%
May 31, 2012	$1.343B	▼ 8.58%
April 30, 2012	$1.469B	▼ 8.02%
March 30, 2012	$1.597B	▲ 8.71%
February 29, 2012	$1.469B	▲ 2.37%
January 31, 2012	$1.435B	▲ 21.71%
2011	$1.179B	▼ 40.51%
December 30, 2011	$1.179B	▲ 3.51%
November 30, 2011	$1.139B	▼ 8.15%
October 31, 2011	$1.240B	▲ 14.29%
September 30, 2011	$1.085B	▼ 8.52%
August 31, 2011	$1.186B	▼ 19.81%
July 29, 2011	$1.479B	▼ 15.92%
June 30, 2011	$1.759B	▼ 31.26%
May 31, 2011	$2.559B	▼ 4.62%
April 29, 2011	$2.683B	▲ 8.84%
March 31, 2011	$2.465B	▼ 5.81%
February 28, 2011	$2.617B	▲ 25.10%
January 31, 2011	$2.092B	▲ 5.55%
2010	$1.982B	▲ 98.60%
December 31, 2010	$1.982B	▲ 39.28%
November 30, 2010	$1.423B	▲ 10.14%
October 29, 2010	$1.292B	▼ 11.32%
September 30, 2010	$1.457B	▲ 24.64%
August 31, 2010	$1.169B	▼ 4.10%
July 30, 2010	$1.219B	▲ 3.31%
June 30, 2010	$1.180B	▼ 18.56%
May 28, 2010	$1.449B	▼ 16.00%
April 30, 2010	$1.725B	▲ 22.08%
March 31, 2010	$1.413B	▲ 6.48%
February 26, 2010	$1.327B	▲ 13.03%
January 29, 2010	$1.174B	▲ 17.64%
2009	$0.998B	▲ 64.42%
December 31, 2009	$0.998B	▼ 9.19%
November 30, 2009	$1.099B	▲ 2.33%
October 30, 2009	$1.074B	▼ 27.92%
September 30, 2009	$1.490B	▲ 21.43%
August 31, 2009	$1.227B	▲ 20.18%
July 31, 2009	$1.021B	▲ 8.27%
June 30, 2009	$0.943B	▼ 5.98%
May 29, 2009	$1.003B	▼ 7.47%
April 30, 2009	$1.084B	▲ 53.76%
March 31, 2009	$0.705B	▲ 45.06%
February 27, 2009	$0.486B	▼ 13.98%
January 30, 2009	$0.565B	▼ 6.92%
2008	$0.607B	▼ 79.50%
December 31, 2008	$0.607B	▼ 9.27%
November 28, 2008	$0.669B	▼ 23.01%
October 31, 2008	$0.869B	▼ 4.51%
September 30, 2008	$0.910B	▼ 42.04%
August 29, 2008	$1.570B	▼ 15.91%
July 31, 2008	$1.867B	▼ 10.63%
June 30, 2008	$2.089B	▼ 24.17%
May 30, 2008	$2.755B	▼ 9.61%
April 30, 2008	$3.048B	▲ 13.56%
March 31, 2008	$2.684B	▲ 19.34%
February 29, 2008	$2.249B	▼ 4.78%
January 31, 2008	$2.362B	▼ 20.23%
2007	$2.961B	▲ 25.79%
December 31, 2007	$2.961B	▼ 22.39%
November 30, 2007	$3.815B	▼ 8.12%
October 31, 2007	$4.152B	▲ 26.86%
September 28, 2007	$3.273B	▲ 0.52%
August 31, 2007	$3.256B	▲ 3.69%
July 31, 2007	$3.140B	▲ 1.78%
June 29, 2007	$3.085B	▲ 5.25%
May 31, 2007	$2.931B	▲ 17.71%
April 30, 2007	$2.490B	▲ 4.67%
March 30, 2007	$2.379B	▼ 11.20%
February 28, 2007	$2.679B	▲ 12.14%
January 31, 2007	$2.389B	▲ 1.49%
2006	$2.354B	▲ 38.63%
December 29, 2006	$2.354B	▲ 10.31%
November 30, 2006	$2.134B	▲ 6.91%
October 31, 2006	$1.996B	▼ 13.29%
September 29, 2006	$2.302B	▼ 1.41%
August 31, 2006	$2.335B	▲ 8.86%
July 31, 2006	$2.145B	▼ 24.15%
June 30, 2006	$2.828B	▲ 11.87%
May 31, 2006	$2.528B	▲ 6.08%
April 28, 2006	$2.383B	▼ 21.48%
March 31, 2006	$3.035B	▲ 29.59%
February 28, 2006	$2.342B	▲ 0.69%
January 31, 2006	$2.326B	▲ 36.98%
2005	$1.698B	▼ 11.10%
December 30, 2005	$1.698B	▼ 0.64%
November 30, 2005	$1.709B	▲ 26.13%
October 31, 2005	$1.355B	▼ 11.21%
September 30, 2005	$1.526B	▲ 17.29%
August 31, 2005	$1.301B	▲ 0.70%
July 29, 2005	$1.292B	▲ 7.22%
June 30, 2005	$1.205B	▼ 5.86%
May 31, 2005	$1.280B	▼ 2.74%
April 29, 2005	$1.316B	▲ 33.60%
March 31, 2005	$0.985B	▼ 13.06%
February 28, 2005	$1.133B	▼ 22.34%
January 31, 2005	$1.459B	▼ 23.61%
2004	$1.910B	▼ 38.57%
December 31, 2004	$1.910B	▲ 31.00%
November 30, 2004	$1.458B	▲ 3.70%
October 29, 2004	$1.406B	▲ 24.76%
September 30, 2004	$1.127B	▲ 8.78%
August 31, 2004	$1.036B	▼ 35.29%
July 30, 2004	$1.601B	▼ 23.80%
June 30, 2004	$2.101B	▲ 3.04%
May 28, 2004	$2.039B	▲ 3.50%
April 30, 2004	$1.970B	▼ 16.56%
March 31, 2004	$2.361B	▼ 13.26%
February 27, 2004	$2.722B	▼ 20.78%
January 30, 2004	$3.436B	▲ 10.52%
2003	$3.109B	▲ 39.67%
December 31, 2003	$3.109B	▼ 7.19%
November 28, 2003	$3.350B	▲ 10.45%
October 31, 2003	$3.033B	▲ 10.37%
September 30, 2003	$2.748B	▼ 9.84%
August 29, 2003	$3.048B	▲ 12.89%
July 31, 2003	$2.700B	▲ 20.00%
June 30, 2003	$2.250B	▼ 10.07%
May 30, 2003	$2.502B	▲ 17.85%
April 30, 2003	$2.123B	▲ 12.03%
March 31, 2003	$1.895B	▼ 19.36%
February 28, 2003	$2.350B	▼ 6.52%
January 31, 2003	$2.514B	▲ 12.94%
2002	$2.226B	▼ 52.59%
December 31, 2002	$2.226B	▼ 22.65%
November 29, 2002	$2.878B	▲ 80.67%
October 31, 2002	$1.593B	▲ 24.26%
September 30, 2002	$1.282B	▼ 26.87%
August 30, 2002	$1.753B	▲ 0.81%
July 31, 2002	$1.739B	▲ 25.74%
June 28, 2002	$1.383B	▼ 25.96%
May 31, 2002	$1.868B	▼ 24.40%
April 30, 2002	$2.471B	▼ 16.52%
March 28, 2002	$2.960B	▲ 15.99%
February 28, 2002	$2.552B	▼ 38.84%
January 31, 2002	$4.173B	▼ 11.12%
2001	$4.695B	▼ 79.84%
December 31, 2001	$4.695B	▼ 19.39%
November 30, 2001	$5.824B	▲ 9.17%
October 31, 2001	$5.335B	▲ 58.45%
September 28, 2001	$3.367B	▼ 39.91%
August 31, 2001	$5.603B	▼ 48.36%
July 31, 2001	$10.850B	▼ 12.58%
June 29, 2001	$12.412B	▼ 29.82%
May 31, 2001	$17.686B	▲ 7.34%
April 30, 2001	$16.477B	▲ 31.88%
March 30, 2001	$12.494B	▼ 37.86%
February 28, 2001	$20.106B	▼ 22.52%
January 31, 2001	$25.949B	▲ 11.42%
2000	$23.290B	▲ 193.07%
December 29, 2000	$23.290B	▲ 7.00%
November 30, 2000	$21.767B	▼ 27.77%
October 31, 2000	$30.134B	▼ 13.64%
September 29, 2000	$34.895B	▲ 10.80%
August 31, 2000	$31.494B	▲ 56.14%
July 31, 2000	$20.171B	▼ 14.33%
June 30, 2000	$23.546B	▲ 39.27%
May 31, 2000	$16.907B	▼ 2.32%
April 28, 2000	$17.308B	▼ 1.98%
March 31, 2000	$17.658B	▼ 21.08%
February 29, 2000	$22.374B	▲ 143.83%
January 31, 2000	$9.176B	▲ 15.46%
1999	$7.947B	▲ 425.94%
December 31, 1999	$7.947B	▲ 30.86%
November 30, 1999	$6.073B	▲ 27.99%
October 29, 1999	$4.745B	▼ 3.42%
September 30, 1999	$4.913B	▲ 3.91%
August 31, 1999	$4.728B	▲ 15.46%
July 30, 1999	$4.095B	▲ 11.79%
June 30, 1999	$3.663B	▲ 4.99%
May 28, 1999	$3.489B	▲ 22.34%
April 30, 1999	$2.852B	▲ 22.67%
March 31, 1999	$2.325B	▼ 19.30%
February 26, 1999	$2.881B	▲ 38.18%
January 29, 1999	$2.085B	▲ 37.99%
1998	$1.511B	▼ 75.12%
December 31, 1998	$1.511B	▼ 13.95%
November 30, 1998	$1.756B	▼ 0.40%
October 30, 1998	$1.763B	▲ 20.10%
September 30, 1998	$1.468B	▼ 49.10%
August 31, 1998	$2.884B	▼ 62.03%
July 31, 1998	$7.595B	▲ 7.40%
June 30, 1998	$7.072B	▲ 33.89%
May 29, 1998	$5.282B	▼ 6.73%
April 30, 1998	$5.663B	▲ 32.72%
March 31, 1998	$4.267B	▲ 1.64%
February 27, 1998	$4.198B	▼ 23.24%
January 30, 1998	$5.469B	▼ 9.93%
1997	$6.072B	▲ 101.86%
December 31, 1997	$6.072B	▲ 13.20%
November 28, 1997	$5.364B	▼ 1.81%
October 31, 1997	$5.463B	▲ 12.34%
September 30, 1997	$4.863B	▲ 3.67%
August 29, 1997	$4.691B	▼ 14.93%
July 31, 1997	$5.514B	▲ 21.56%
June 30, 1997	$4.536B	▲ 0.80%
May 30, 1997	$4.500B	▲ 49.60%
April 30, 1997	$3.008B	N/A

All market cap values reflect closing prices for the period shown.

📊 Ciena Market Cap and Other Industry Peers

Below are selected companies from the Technology sector / subsector:

Data reflect the most recent market capitalization values available.

💡 What Is Market Capitalization and How Do We Calculate It?

For Ciena Corp. (CIEN), market capitalization represents the total market value of the company’s publicly traded shares. It helps investors understand Ciena’s size within the technology sector and compare it with other companies in the same industry.

In most cases, market capitalization is calculated by multiplying the current share price by the number of basic shares outstanding. Basic shares represent the actual number of common shares that currently exist, without including potential future shares from employee stock options, RSUs, warrants, or convertible securities. For example, if Ciena had one million basic shares and each traded at $50, its market capitalization would be $50 million.

Formula:
Market Cap = Share Price × Shares Outstanding

The value of Ciena’s market capitalization changes throughout the trading day because it mainly depends on the current share price. The number of shares outstanding typically remains stable unless the company issues new shares, buys back its own stock, or grants stock options to employees.

Based on the latest data, Ciena had a market capitalization of $30.820 billion, placing it in the large-cap category within the technology industry.

Disclaimer: Despite all efforts, there may still be minor inaccuracies present in the data.