Ciena (CIEN) - Market capitalization

Market cap: C$38.88 Billion

As of December 2025 Ciena has a market cap of C$38.88 Billion. This makes Ciena the world's 823th 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	C$38.88 B	120.05%
2024	C$17.67 B	104.4%
2023	C$8.64 B	-15.79%
2022	C$10.26 B	-32.42%
2021	C$15.19 B	45.87%
2020	C$10.41 B	21.26%
2019	C$8.58 B	18.83%
2018	C$7.22 B	91.18%
2017	C$3.78 B	-17.9%
2016	C$4.60 B	18.16%
2015	C$3.89 B	61.73%
2014	C$2.40 B	-8.78%
2013	C$2.64 B	68.19%
2012	C$1.57 B	30.97%
2011	C$1.19 B	-39.46%
2010	C$1.98 B	88.71%
2009	C$1.04 B	42.34%
2008	C$0.73 B	-75.03%
2007	C$2.95 B	7.78%
2006	C$2.74 B	36.43%
2005	C$2.00 B	-12.43%
2004	C$2.29 B	-43.11%
2003	C$4.03 B	14.69%
2002	C$3.51 B	-52.99%
2001	C$7.47 B	-78.56%
2000	C$34.87 B	204.35%
1999	C$11.46 B	393.63%
1998	C$2.32 B	-73.23%
1997	C$8.67 B

End of Day market cap according to different sources

On Dec 4th, 2025 the market cap of Ciena was reported to be:

C$38.20 Billion

by Nasdaq

C$38.28 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Infinera INFN	C$2.18 B	-94.38%	🇺🇸 USA
ADTRAN ADTN	C$0.93 B	-97.58%	🇺🇸 USA
Juniper Networks JNPR	C$18.48 B	-52.47%	🇺🇸 USA
Calix CALX	C$4.94 B	-87.28%	🇺🇸 USA
Cisco CSCO	C$425.60 B	994.40%	🇺🇸 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: C$38.88 Billion