What is the current annual debt to equity of CIEN?

As of today, CIEN annual debt to equity is 0.58

What is 1-year change in CIEN annual debt to equity?

CIEN annual debt to equity has remained unchanged year-over-year

What is 3-year change in CIEN annual debt to equity?

CIEN annual debt to equity is up +31.82% over the past 3 years

How far is CIEN annual debt to equity from its all-time high?

CIEN annual debt to equity is currently -99.44% below its historical high of 103.97 set on October 31, 2011

How does CIEN annual debt to equity rank versus sector peers?

CIEN annual debt to equity is higher than 72.62% of companies in Technology sector

When is CIEN next annual earnings release?

The next annual earnings release for CIEN is on December 10, 2026

What is the current quarterly debt to equity of CIEN?

As of today, CIEN quarterly debt to equity is 1.08

What is CIEN quarterly debt to equity most recent change?

CIEN quarterly debt to equity was up +96.36% on July 1, 2026

What is 1-year change in CIEN quarterly debt to equity?

CIEN quarterly debt to equity is up +89.47% year-over-year

How far is CIEN quarterly debt to equity from its all-time high?

CIEN quarterly debt to equity is currently -98.96% below its historical high of 103.97 set on October 31, 2011

How does CIEN quarterly debt to equity rank versus sector peers?

CIEN quarterly debt to equity is higher than 81.30% of companies in Technology sector

When is CIEN next earnings release?

The next earnings release for CIEN is on December 10, 2026

CIEN Debt To Equity Ratio History & Chart Since 1996

Annual Debt To Equity

0.580.000.00%

October 1, 2025

Summary

Current Value: As of today, CIEN annual debt to equity is 0.58, unchanged on October 1, 2025
Historical Performance: CIEN annual debt to equity is up +31.82% over the past 3 years, up +75.76% over the past 5 years
All-Time High Comparison: CIEN annual debt to equity is currently -99.44% below its historical high of 103.97 set on October 31, 2011
3-Year Low Comparison: CIEN annual debt to equity is +31.82% above its 3-year low of 0.44 reached on an earlier date
Sector Comparison: CIEN annual debt to equity is higher than 72.62% of companies in Technology sector

Debt To Equity Chart

Performance

CIEN Performance
Metric	Date	Value	1Y	3Y	5Y	15Y
Annual Debt To Equity	Oct 1, 25	0.58	0.0%	+31.8%	+75.8%	-93.6%
Quarterly Debt To Equity	Jul 1, 26	1.08	+89.5%	+96.4%	+285.7%	-97.9%
Price	Sep 18, 26	$348.80	+152.7%	+613.9%	+556.4%	+2581.0%
Annual Total Debt	Oct 1, 25	$1.58B	-3.1%	+33.4%	+91.1%	+9.7%
	Oct 1, 25	$2.73B	-3.1%	+0.6%	+8.8%	+1613.4%
	Oct 1, 25	2.73	-22.4%	-15.2%	-20.2%	-10.5%
	Oct 1, 25	2.09	-22.6%	-9.5%	-29.4%	-16.4%
	Oct 1, 25	$25.54M	-16.4%	-13.8%	-11.3%	+100.0%
	Oct 1, 25	$1.56B	-2.8%	+34.6%	+94.8%	+7.9%
	Jul 1, 26	8	+14.3%	+33.3%	+14.3%	+100.0%
	Sep 18, 26	10.16	+116.6%	+345.6%	+207.9%	+506.4%

Debt To Equity Highs

CIEN Annual Debt To Equity Highs Comparison
Period	High	Date	Current
3Y	0.58	Oct 31, 23	at high
5Y	0.58	Oct 31, 23	at high
All	103.97	Oct 31, 11	-99.4%

Debt To Equity Lows

CIEN Annual Debt To Equity Lows Comparison
Period	Low	Date	Current
3Y	0.44	N/A	+31.8%
5Y	0.27	Oct 30, 21	+114.8%
All	-21.22	Oct 31, 14	+102.7%

Debt To Equity History

Year	Value	Change
2025	0.58	0.0%
2024	0.58	0.0%
2023	0.58	+31.8%
2022	0.44	+63.0%
2021	0.27	-18.2%
2020	0.33	-5.7%
2019	0.35	-12.5%
2018	0.40	-14.9%
2017	0.47	-71.9%
2016	1.67	-19.7%
2015	2.08	+109.8%
2014	-21.22	-44.7%
2013	-14.66	+9.6%
2012	-16.21	-115.6%
2011	103.97	+1,047.6%

Year	Value	Change
2010	9.06	+417.7%
2009	1.75	+118.8%
2008	0.80	-49.4%
2007	1.58	+41.1%
2006	1.12	+27.3%
2005	0.88	+46.7%
2004	0.60	+9.1%
2003	0.55	0.0%
2002	0.55	+34.1%
2001	0.41	>+9,900.0%
2000	0.00	0.0%
1999	0.00	0.0%
1998	0.00	0.0%
1997	0.00	0.0%
1996	0.00	-

FAQ

What is the current annual debt to equity of CIEN?: As of today, CIEN annual debt to equity is 0.58
What is 1-year change in CIEN annual debt to equity?: CIEN annual debt to equity has remained unchanged year-over-year
What is 3-year change in CIEN annual debt to equity?: CIEN annual debt to equity is up +31.82% over the past 3 years
How far is CIEN annual debt to equity from its all-time high?: CIEN annual debt to equity is currently -99.44% below its historical high of 103.97 set on October 31, 2011
How does CIEN annual debt to equity rank versus sector peers?: CIEN annual debt to equity is higher than 72.62% of companies in Technology sector
When is CIEN next annual earnings release?: The next annual earnings release for CIEN is on December 10, 2026

Debt To Equity Formula

Debt To Equity =

Total Debt

Quarterly Debt To Equity

1.080.53+96.36%

July 1, 2026

Summary

Current Value: As of today, CIEN quarterly debt to equity is 1.08, up +96.36% on July 1, 2026
Historical Performance: CIEN quarterly debt to equity is up +89.47% year-over-year, up +96.36% over the past 3 years
All-Time High Comparison: CIEN quarterly debt to equity is currently -98.96% below its historical high of 103.97 set on October 31, 2011
3-Year Low Comparison: CIEN quarterly debt to equity is +96.36% above its 3-year low of 0.55 reached on January 27, 2024
Sector Comparison: CIEN quarterly debt to equity is higher than 81.30% of companies in Technology sector

Performance

CIEN Performance
Metric	Date	Value	3M	1Y	3Y	5Y
Quarterly Debt To Equity	Jul 1, 26	1.08	+96.4%	+89.5%	+96.4%	+285.7%
Annual Debt To Equity	Oct 1, 25	0.58	–	0.0%	+31.8%	+75.8%
Price	Sep 18, 26	$348.80	-18.6%	+152.7%	+613.9%	+556.4%
Quarterly Total Debt	Jul 1, 26	$3.29B	+107.9%	+107.0%	+103.5%	+302.9%
	Jul 1, 26	$3.06B	+5.7%	+9.7%	+3.7%	+4.5%
	Jul 1, 26	3.80	+39.2%	+15.8%	-3.1%	+5.3%
	Jul 1, 26	3.17	+50.2%	+25.8%	+17.8%	+0.3%
	Jul 1, 26	$17.40M	-40.1%	-33.8%	-47.2%	-40.8%
	Jul 1, 26	$3.27B	+110.7%	+109.4%	+106.6%	+315.7%
	Jul 1, 26	8	0.0%	+14.3%	+33.3%	+14.3%
	Sep 18, 26	10.16	-17.3%	+116.6%	+345.6%	+207.9%

Quarterly Debt To Equity Highs

CIEN Quarterly Debt To Equity Highs Comparison
Period	High	Date	Current
1Y	1.08	Jul 1, 26	at high
3Y	1.08	Jul 1, 26	at high
5Y	1.08	Jul 1, 26	at high
All	103.97	Oct 31, 11	-99.0%

Quarterly Debt To Equity Lows

CIEN Quarterly Debt To Equity Lows Comparison
Period	Low	Date	Current
1Y	0.55	Apr 1, 26	+96.4%
3Y	0.55	Jan 27, 24	+96.4%
5Y	0.27	Oct 30, 21	+300.0%
All	-68.34	Jan 31, 12	+101.6%

Quarterly Debt To Equity History

Month	Value	Change
Jul 2026	1.08	+96.4%
Apr 2026	0.55	-3.5%
Jan 2026	0.57	-5.0%
Oct 2025	0.60	+5.3%
Jul 2025	0.57	0.0%
Apr 2025	0.57	0.0%
Jan 2025	0.57	-1.7%
Oct 2024	0.58	+5.5%
Jul 2024	0.55	-1.8%
Apr 2024	0.56	+1.8%
Jan 2024	0.55	-5.2%
Oct 2023	0.58	+5.5%
Jul 2023	0.55	-1.8%
Apr 2023	0.56	-1.8%
Jan 2023	0.57	+29.5%
Oct 2022	0.44	+2.3%
Jul 2022	0.43	+4.9%
Apr 2022	0.41	+2.5%
Jan 2022	0.40	+48.1%
Oct 2021	0.27	-3.6%
Jul 2021	0.28	-9.7%
Apr 2021	0.31	-3.1%
Jan 2021	0.32	-3.0%
Oct 2020	0.33	-2.9%
Jul 2020	0.34	-5.6%
Apr 2020	0.36	-5.3%
Jan 2020	0.38	+8.6%
Oct 2019	0.35	+6.1%
Jul 2019	0.33	-2.9%
Apr 2019	0.34	0.0%
Jan 2019	0.34	-15.0%
Oct 2018	0.40	-24.5%
Jul 2018	0.53	-1.9%
Apr 2018	0.54	0.0%
Jan 2018	0.54	+14.9%
Oct 2017	0.47	-56.5%
Jul 2017	1.08	-21.2%
Apr 2017	1.37	-11.6%
Jan 2017	1.55	-7.7%
Oct 2016	1.68	-19.6%
Jul 2016	2.09	-9.1%
Apr 2016	2.30	+12.7%
Jan 2016	2.04	-1.9%
Oct 2015	2.08	-71.5%
Jul 2015	7.31	-21.8%
Apr 2015	9.35	+156.2%
Jan 2015	-16.65	+21.5%
Oct 2014	-21.22	+34.6%
Jul 2014	-32.43	-115.9%
Apr 2014	-15.02	-7.5%
Jan 2014	-13.97	+4.7%
Oct 2013	-14.66	-0.7%
Jul 2013	-14.56	-17.9%
Apr 2013	-12.35	+31.8%
Jan 2013	-18.12	-11.8%
Oct 2012	-16.21	+32.3%
Jul 2012	-23.93	+31.9%
Apr 2012	-35.12	+48.6%
Jan 2012	-68.34	-165.7%
Oct 2011	103.97	+105.9%

Month	Value	Change
Jul 2011	50.49	+74.0%
Apr 2011	29.02	+91.3%
Jan 2011	15.17	+67.4%
Oct 2010	9.06	+75.9%
Jul 2010	5.15	+44.3%
Apr 2010	3.57	+83.1%
Jan 2010	1.95	+11.4%
Oct 2009	1.75	+4.2%
Jul 2009	1.68	+3.1%
Apr 2009	1.63	+101.2%
Jan 2009	0.81	+1.3%
Oct 2008	0.80	+1.3%
Jul 2008	0.79	-1.3%
Apr 2008	0.80	-11.1%
Jan 2008	0.90	-43.0%
Oct 2007	1.58	-6.5%
Jul 2007	1.69	+59.4%
Apr 2007	1.06	-2.8%
Jan 2007	1.09	-2.7%
Oct 2006	1.12	-2.6%
Jul 2006	1.15	-0.9%
Apr 2006	1.16	+56.8%
Jan 2006	0.74	-15.9%
Oct 2005	0.88	+33.3%
Jul 2005	0.66	-1.5%
Apr 2005	0.67	+6.3%
Jan 2005	0.63	+5.0%
Oct 2004	0.60	+42.9%
Jul 2004	0.42	-27.6%
Apr 2004	0.58	+5.5%
Jan 2004	0.55	0.0%
Oct 2003	0.55	+7.8%
Jul 2003	0.51	-5.6%
Apr 2003	0.54	+5.9%
Jan 2003	0.51	-7.3%
Oct 2002	0.55	+37.5%
Jul 2002	0.40	-14.9%
Apr 2002	0.47	+11.9%
Jan 2002	0.42	+2.4%
Oct 2001	0.41	+86.4%
Jul 2001	0.22	0.0%
Apr 2001	0.22	>+9,900.0%
Jan 2001	0.00	0.0%
Oct 2000	0.00	0.0%
Jul 2000	0.00	0.0%
Apr 2000	0.00	0.0%
Jan 2000	0.00	0.0%
Oct 1999	0.00	0.0%
Jul 1999	0.00	0.0%
Apr 1999	0.00	0.0%
Jan 1999	0.00	0.0%
Oct 1998	0.00	0.0%
Jul 1998	0.00	0.0%
Apr 1998	0.00	0.0%
Jan 1998	0.00	0.0%
Oct 1997	0.00	-100.0%
Jul 1997	0.01	0.0%
Apr 1997	0.01	-83.3%
Jan 1997	0.06	-

FAQ

What is the current quarterly debt to equity of CIEN?: As of today, CIEN quarterly debt to equity is 1.08
What is CIEN quarterly debt to equity most recent change?: CIEN quarterly debt to equity was up +96.36% on July 1, 2026
What is 1-year change in CIEN quarterly debt to equity?: CIEN quarterly debt to equity is up +89.47% year-over-year
How far is CIEN quarterly debt to equity from its all-time high?: CIEN quarterly debt to equity is currently -98.96% below its historical high of 103.97 set on October 31, 2011
How does CIEN quarterly debt to equity rank versus sector peers?: CIEN quarterly debt to equity is higher than 81.30% of companies in Technology sector
When is CIEN next earnings release?: The next earnings release for CIEN is on December 10, 2026

Debt To Equity Formula

Debt To Equity =

Total Debt

Data Sources & References

CIEN Official Website www.ciena.com
CIEN Profile on Yahoo Finance finance.yahoo.com/quote/CIEN
CIEN Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/cien