CIENA CORP (CIEN) - Dilution Analysis

Visualizing historical and potential share dilution over time

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Dilution Analysis

Low Risk

Limited dilution potential

Last updated: September 04, 2025

Risk Assessment Details

Potential Dilution: 0.0% of current shares

Recent Dilution: 0.22% (2 years)

Historical Dilution Factor: minimal recent dilution

Outstanding Shares

140M

Potential Supply

Additional shares possible

Splits

None

Past 2 years

Summary

CIEN currently has 142M outstanding shares. with minimal authorized share overhang for future dilution. The company has minimally diluted shareholders by 0.22% over the past 2 years.

Share Structure Timeline

Outstanding Shares

Total Supply

Historical Data Points

Date	Event	Outstanding
Sep 04, 2025	10-Q filing \| 141.8M shares outstanding	140M
Jun 05, 2025	10-Q filing \| 142.5M shares outstanding	140M
Mar 12, 2025	10-Q filing \| 142.9M shares outstanding	140M
Dec 20, 2024	10-K filing \| 144.7M shares outstanding	140M
Sep 04, 2024	10-Q filing \| 144.4M shares outstanding	140M
Jun 06, 2024	10-Q filing \| 144.9M shares outstanding	140M
Mar 07, 2024	10-Q filing \| 145.3M shares outstanding	150M
Dec 15, 2023	10-K filing \| 149.0M shares outstanding	150M
Sep 06, 2023	10-Q filing \| 149.7M shares outstanding	150M
Jun 07, 2023	10-Q filing \| 149.6M shares outstanding	150M
Mar 08, 2023	10-Q filing \| 149.1M shares outstanding	150M
Dec 16, 2022	10-K filing \| 151.2M shares outstanding	150M
Sep 07, 2022	10-Q filing \| 149.9M shares outstanding	150M
Jun 08, 2022	10-Q filing \| 152.2M shares outstanding	150M
Mar 09, 2022	10-Q filing \| 154.2M shares outstanding	150M
Dec 17, 2021	10-K filing \| 155.3M shares outstanding	160M
Sep 08, 2021	10-Q filing \| 155.3M shares outstanding	160M
Jun 09, 2021	10-Q filing \| 155.3M shares outstanding	160M
Mar 10, 2021	10-Q filing \| 155.2M shares outstanding	160M
Dec 18, 2020	10-K filing \| 154.3M shares outstanding	150M
Sep 09, 2020	10-Q filing \| 154.2M shares outstanding	150M
Jun 10, 2020	10-Q filing \| 153.9M shares outstanding	150M
Mar 11, 2020	10-Q filing \| 154.3M shares outstanding	150M

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