Ciena (CIEN) - Market capitalization

Market cap: £22.75 Billion

As of December 2025 Ciena has a market cap of £22.75 Billion. This makes Ciena the world's 767th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Ciena from 1997 to 2025

End of year Market Cap

Year	Marketcap	Change
2025	£22.75 B	131.89%
2024	£9.81 B	91.8%
2023	£5.11 B	-18.18%
2022	£6.25 B	-29.19%
2021	£8.83 B	47.37%
2020	£5.99 B	19.49%
2019	£5.01 B	19.97%
2018	£4.18 B	87.87%
2017	£2.22 B	-19.88%
2016	£2.77 B	46.48%
2015	£1.89 B	42.14%
2014	£1.33 B	-11.35%
2013	£1.50 B	53.95%
2012	£0.97 B	28.83%
2011	£0.75 B	-40.91%
2010	£1.28 B	108.22%
2009	£0.61 B	48.97%
2008	£0.41 B	-72.23%
2007	£1.49 B	24.03%
2006	£1.20 B	20.11%
2005	£1.00 B	0.57%
2004	£0.99 B	-42.75%
2003	£1.73 B	25.17%
2002	£1.38 B	-57.12%
2001	£3.23 B	-79.24%
2000	£15.59 B	217.2%
1999	£4.91 B	441.52%
1998	£0.90 B	-75.42%
1997	£3.69 B

End of Day market cap according to different sources

On Dec 9th, 2025 the market cap of Ciena was reported to be:

£22.69 Billion

by Nasdaq

£22.75 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Infinera INFN	£1.18 B	-94.78%	🇺🇸 USA
ADTRAN ADTN	£0.52 B	-97.68%	🇺🇸 USA
Juniper Networks JNPR	£10.03 B	-55.92%	🇺🇸 USA
Calix CALX	£2.77 B	-87.82%	🇺🇸 USA
Cisco CSCO	£235.93 B	936.73%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of Ciena (CIEN)

Market cap: £22.75 Billion