Ciena (CIEN) Market Cap 1997–2026

As of October 29, 2026, Ciena had a market cap of $49.59 billion, which decreased by 3.78% 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: Oct 29, 2026, 4:00 PM ET

Ciena Corp. (CIEN)

🌍 United States 📈 NYSE 🏭 Technology 🏢 Communications Equipment

Latest Market Cap

$49.59B ▼ 3.78%

Start of 2026

$32.94B ▲ 50.55%

1 Year Ago

$26.65B ▲ 86.08%

All-Time High

$88.66B ▼ 44.07%

Loading data...

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
2026	$49.59B	▲ 50.55%
October 29, 2026	$49.59B	▼ 0.66%
September 30, 2026	$49.92B	▼ 7.90%
August 31, 2026	$54.2B	▲ 1.52%
July 31, 2026	$53.39B	▼ 23.14%
June 30, 2026	$69.46B	▼ 15.33%
May 29, 2026	$82.04B	▲ 9.97%
April 30, 2026	$74.6B	▲ 35.88%
March 31, 2026	$54.9B	▲ 11.77%
February 27, 2026	$49.12B	▲ 38.48%
January 30, 2026	$35.47B	▲ 7.68%
2025	$32.94B	▲ 173.29%
December 31, 2025	$32.94B	▲ 14.34%
November 28, 2025	$28.81B	▲ 7.54%
October 31, 2025	$26.79B	▲ 30.36%
September 30, 2025	$20.55B	▲ 54.74%
August 29, 2025	$13.28B	▲ 1.22%
July 31, 2025	$13.12B	▲ 14.09%
June 30, 2025	$11.5B	▲ 1.59%
May 30, 2025	$11.32B	▲ 18.57%
April 30, 2025	$9.547B	▲ 11.14%
March 31, 2025	$8.59B	▼ 24.25%
February 28, 2025	$11.34B	▼ 8.77%
January 31, 2025	$12.43B	▲ 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	$7.15B	▼ 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	$6.64B	▲ 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	$8.49B	▲ 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	$3.57B	▲ 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	$2.59B	▲ 7.47%
May 31, 2016	$2.41B	▲ 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	$2.58B	▲ 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	$2.42B	▼ 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	$1.59B	▲ 0.63%
2012	$1.58B	▲ 34.01%
December 31, 2012	$1.58B	▲ 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	$1.37B	▼ 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	$1.24B	▲ 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	$1.18B	▼ 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	$1.49B	▲ 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	$0.91B	▼ 42.04%
August 29, 2008	$1.57B	▼ 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	$3.14B	▲ 1.78%
June 29, 2007	$3.085B	▲ 5.25%
May 31, 2007	$2.931B	▲ 17.71%
April 30, 2007	$2.49B	▲ 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	$1.28B	▼ 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	$1.91B	▼ 38.57%
December 31, 2004	$1.91B	▲ 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	$1.97B	▼ 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	$3.35B	▲ 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	$2.7B	▲ 20.00%
June 30, 2003	$2.25B	▼ 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	$2.35B	▼ 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	$2.96B	▲ 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	$10.85B	▼ 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	$23.29B	▲ 193.07%
December 29, 2000	$23.29B	▲ 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	$4.5B	▲ 49.60%
April 30, 1997	$3.008B	— 0.00%

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:

Note: Market capitalization figures are based on available sources and may differ slightly from actual values, particularly for historical data.