In 2025, Ciena completed a corporate carbon footprint assessment and publicly disclosed its greenhouse gas (GHG) emissions according to the GHG Protocol, covering Scope 1 (direct emissions from owned or controlled sources), Scope 2 (indirect emissions from purchased energy) and Scope 3 (indirect emissions across the value chain).
However, Ciena has not published a category-level breakdown of its Scope 3 emissions, limiting visibility into specific value chain sources.
| Metric (tCO2e) | 2025 | 2024 | 2023 | 2022-2019 |
|---|---|---|---|---|
Total Scope 1 | 1,566a | 1,709a | 2,136a | |
Total Scope 2 | ||||
Market-Based | 1b | 0c | N/A | |
Location-Based | 15,665b | 14,275c | N/A | |
Unspecified Calculation Method | N/A | N/A | 32a | |
Total Scope 3 | 1,980,971a | 1,687,464a | 2,426,871a | |
Total Scope 1 Revenue Intensity (tCO2e/$M) | 0.3283a | 0.4257a | 0.4869a |
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In 2025, the total operational greenhouse gas (GHG) emissions of Ciena amounted to 17,231 metric tons of CO2 equivalent. This figure includes both direct emissions from owned or controlled sources (Scope 1) and indirect emissions from purchased energy (Scope 2).ab
Compared to 2024, the total operational greenhouse gas (GHG) emissions of Ciena increased by 7.8%, suggesting that the company faced challenges in reducing its emissions from its core operations.abc
In 2025, the total Scope 1 emissions of Ciena were 1,566 metric tons of CO₂ equivalent (tCO₂e).a
Since 2019, Ciena's Scope 1 emissions have decreased by 69.05%, reflecting a declining long-term trend in Scope 1 emissions over time.a
Compared to the previous year (2024), Ciena's Scope 1 emissions decreased by 8.37%, highlighting the company's efforts to lower direct emissions from assets it owns or controls.a
In 2025, Ciena reported Scope 2 greenhouse gas (GHG) emissions of 1 tCO₂e using the market-based method and 15,665 tCO₂e using the location-based method.b
Compared to the previous year (2024), Ciena's Scope 2 emissions (Location-Based) have remained relatively stable, indicating that Ciena's emissions have plateaued with no significant change in its energy consumption footprint.bc
In 2025, Ciena reported its Scope 2 emissions using the market-based method and using the location-based method.b
In 2025, Ciena reported 1,980,971 metric tons of CO₂ equivalent (tCO₂e) of Scope 3 greenhouse gas (GHG) emissions, representing indirect emissions across its upstream and downstream value chain.a
The 2025 disclosure of Ciena includes a breakdown across 0 of the 15 Scope 3 categories defined by the GHG Protocol, matching the level of disclosure in 2024, demonstrating consistent Scope 3 emissions reporting coverage year over year.a
In 2025, Ciena reported total Scope 3 emissions of 1,980,971 metric tons of CO₂ equivalent (tCO₂e).a
Since 2019, Ciena's Scope 3 emissions have decreased by 12.69%, reflecting a declining long-term trend in Scope 3 emissions over time.a
Compared to the previous year (2024), Ciena's Scope 3 emissions increased by 17.39%, suggesting that the company faced challenges in reducing emissions across its value chain.a
In 2025, Ciena reported Scope 1 greenhouse gas (GHG) emissions of 1,566 tCO₂e and total revenues of USD 4,770 millions. This translates into an emissions intensity of 0.33 tCO₂e per millions USD.a
In 2025, Ciena reported a Scope 1 emissions intensity of 0.33 tCO₂e per millions USD. Compared to the peer group median of 1.29, this places the company below its industry benchmark, indicating it is more carbon-efficient than most competitors.a
In 2025, Ciena ranked 2 out of 24 companies in its industry peer group, based on Scope 1 emissions intensity (measured in tCO₂e per millions USD).a
This places Ciena among the top performers, with one of the lowest emissions intensities relative to peers.a
In 2025, Ciena reported a total carbon footprint of 1,998,202 metric tons of CO₂ equivalent (tCO₂e) across Scope 1, Scope 2, and Scope 3 emissions. This represents a 17.3% increase compared to 2024, suggesting a rise in emissions across its operations or value chain.abc
The largest contributor to Ciena's total carbon footprint was Scope 3 emissions, accounting for 99.14% of the company's total carbon footprint, followed by Scope 2 emissions at 0.78%.ab