What is Ciena's diluted shares outstanding?

Latest reported diluted shares outstanding for Ciena (CIEN) is 146M as of the trailing twelve months (TTM) ending May 2, 2026.

How has Ciena diluted shares outstanding changed year-over-year?

Ciena (CIEN) diluted shares outstanding changed -0.5% year-over-year on the latest annual filing.

What is the long-term growth rate of Ciena diluted shares outstanding?

Ciena (CIEN) diluted shares outstanding compound annual growth rate is -1.4% over the most recent 5 years available.

When did Ciena diluted shares outstanding hit its highest annual value?

Ciena diluted shares outstanding reached its highest annual value of 170M in 2017.

What was Ciena diluted shares outstanding in 2024?

Ciena (CIEN) diluted shares outstanding in 2024 was 146M.

What was Ciena diluted shares outstanding in 2025?

Ciena (CIEN) diluted shares outstanding in 2025 was 145M.

Ciena (CIEN) Shares Outstanding 1997-2026

Latest period

146M

YoY change

-0.5%

5Y CAGR

-1.4%

Peak year (FY2017)

170M

Shares Outstanding history chart for Ciena (CIEN) from 2016 to 2025

Latest: 145M

Shares Outstanding growth chart for Ciena (CIEN) from 2016 to 2025

Latest: -0.5%

Shares Outstanding history table for Ciena (CIEN) from 1997 to 2025


FY2025	145M	-0.5%	-716K	Nov 1, 2025	Dec 12, 2025
FY2024	146M	-2.3%	-3.42M	Nov 2, 2024	Dec 20, 2024
FY2023	149M	-1.8%	-2.81M	Oct 28, 2023	Dec 15, 2023
FY2022	152M	-2.9%	-4.55M	Oct 29, 2022	Dec 16, 2022
FY2021	157M	+0.5%	+788K	Oct 30, 2021	Dec 17, 2021
FY2020	156M	-1.1%	-1.66M	Oct 31, 2020	Dec 18, 2020
FY2019	158M	+9.7%	+13.9M	Oct 31, 2019	Dec 20, 2019
FY2018	144M	-15.4%	-26.2M	Oct 31, 2018	Dec 21, 2018
FY2017	170M	+12.8%	+19.2M	Oct 31, 2017	Dec 22, 2017
FY2016	151M	+25.5%	+30.6M	Oct 31, 2016	Dec 21, 2016
FY2015	120M	+13.5%	+14.3M	Oct 31, 2015	Dec 21, 2015
FY2014	106M	+3.4%	+3.43M	Oct 31, 2014	Dec 19, 2014
FY2013	102M	+3.0%	+3.01M	Oct 31, 2013	Dec 20, 2013
FY2012	99.3M	+3.6%	+3.49M	Oct 31, 2012	Dec 21, 2012
FY2011	95.9M	+3.0%	+2.75M	Oct 31, 2011	Dec 22, 2011
FY2010	93.1M	+2.1%	+1.94M	Oct 31, 2010	Dec 22, 2010
FY2009	91.2M	-17.6%	-19.4M	Oct 31, 2009	Dec 22, 2009
FY2008	111M	+11.0%	+11M	Oct 31, 2008	Dec 23, 2008
FY2007	99.6M	+17.2%	+14.6M	Oct 31, 2007	Dec 27, 2007
FY2006	85M	+3.5%	+2.84M	Oct 31, 2006	Jan 10, 2007
FY2005	82.2M	+10.3%	+7.65M	Oct 31, 2005	Jan 12, 2006
FY2004	74.5M	+16.7%	+10.7M	Oct 31, 2004	Dec 9, 2004
FY2003	63.8M	+22.3%	+11.6M	Oct 31, 2003	Dec 11, 2003
FY2002	52.2M	+17.1%	+7.63M	Oct 31, 2002	Dec 12, 2002
FY2001	44.6M	+4.1%	+1.74M	Oct 31, 2001	Dec 13, 2001
FY2000	42.8M	+12.2%	+4.66M	Oct 31, 2000	Dec 7, 2000
FY1999	38.2M	+4.4%	+1.61M	Oct 31, 1999	Dec 10, 1999
FY1998	36.6M	+23.5%	+6.96M	Oct 31, 1998	Apr 5, 1999
FY1997	29.6M	—	—	Oct 31, 1997	Dec 10, 1997

FY2025145M-0.5%
FY2024146M-2.3%
FY2023149M-1.8%
FY2022152M-2.9%
FY2021157M+0.5%
FY2020156M-1.1%
FY2019158M+9.7%
FY2018144M-15.4%
FY2017170M+12.8%
FY2016151M+25.5%
FY2015120M+13.5%
FY2014106M+3.4%
FY2013102M+3.0%
FY201299.3M+3.6%
FY201195.9M+3.0%
FY201093.1M+2.1%
FY200991.2M-17.6%
FY2008111M+11.0%
FY200799.6M+17.2%
FY200685M+3.5%
FY200582.2M+10.3%
FY200474.5M+16.7%
FY200363.8M+22.3%
FY200252.2M+17.1%
FY200144.6M+4.1%
FY200042.8M+12.2%
FY199938.2M+4.4%
FY199836.6M+23.5%
FY199729.6M—

Shares Outstanding values are taken from Ciena's reported income statements (quarterly 10-Q and annual 10-K filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the filing date. YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.

About Shares Outstanding at Ciena (CIEN)

According to Ciena's latest reported financial statements, the company's latest reported diluted shares outstanding is 146M. Diluted weighted-average shares outstanding is the share count used to compute per-share metrics like EPS. Buybacks lower it; new issuance, stock-based compensation, and convertible securities raise it. Multiply by the stock price for market capitalization.

Headline figure above is from the reporting period ending May 2, 2026 (reported June 4, 2026). Chart and table below cover the full reported history back to 1997.

In 2025, Ciena (CIEN) diluted shares outstanding totalled 145M – edged down 0.5% year-over-year.

Looking at the 2020–2025 (5 years) stretch, Ciena diluted shares outstanding compounded at -1.4% per year, with a net decline across the window.

Ciena diluted shares outstanding peaked at 170M in 2017; the latest annual figure is 145M in 2025 (14.5% below peak).

Across the available history, diluted shares outstanding reached its high of 170M in 2017 and its low of 29.6M in 1997.

Ciena Shares Outstanding by Year

Ciena Shares Outstanding 2025: 145M

Ciena diluted shares outstanding in 2025 was 145M, edged down 0.5% below 2024.

Ciena Shares Outstanding 2024: 146M

2024's diluted shares outstanding for Ciena came in at 146M, edged down 2.3% below 2023.

Ciena Shares Outstanding 2023: 149M

Ciena posted diluted shares outstanding of 149M in 2023, edged down 1.8% below 2022.

Ciena Shares Outstanding 2022: 152M

In 2022, Ciena reported diluted shares outstanding of 152M, edged down 2.9% below 2021.

Ciena Shares Outstanding 2021: 157M

Ciena diluted shares outstanding in 2021 was 157M.

See more financial history for Ciena (CIEN).

Sector peers by Shares Outstanding

Technology peers of Ciena (CIEN), ranked by their latest diluted shares outstanding


NVIDIA (NVDA)	24.5B
Apple (AAPL)	15B
Microsoft (MSFT)	7.45B
SK hynix (SKHY)	7.06B
TSMC (TSM)	5.19B
Broadcom (AVGO)	4.85B
AMD (AMD)	1.64B
Micron Technology (MU)	1.13B

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