In 2025, Idorsia 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).
Idorsia has also provided a category-level breakdown for 11 out of 15 Scope 3 emissions categories, offering greater transparency into its value chain emissions.
| Metric (tCO2e) | 2025 | 2024 | 2023 | 2022-2019 |
|---|---|---|---|---|
Total Scope 1 | 632a | 733.4a | 475a | |
Total Scope 2 | ||||
Unspecified Calculation Method | 14.5a | 29.2a | 507.8a | |
Total Scope 3 | 28,387.3a | 40,487a | N/A | |
Total Scope 1 Revenue Intensity (tCO2e/$M) | 2.2699a | 5.9029a | 2.6224a |
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In 2025, the total operational greenhouse gas (GHG) emissions of Idorsia amounted to 646.5 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).a
Compared to 2024, the total operational greenhouse gas (GHG) emissions of Idorsia decreased by 15.22%, showing that the company has made progress in taking action to reduce the climate impact of its operations.a
In 2025, the total Scope 1 emissions of Idorsia were 632 metric tons of CO₂ equivalent (tCO₂e).a
Since 2022, Idorsia's Scope 1 emissions have increased by 52.95%, reflecting a rising long-term trend in Scope 1 emissions over time.ab
Compared to the previous year (2024), Idorsia's Scope 1 emissions decreased by 13.83%, highlighting the company's efforts to lower direct emissions from assets it owns or controls.a
In 2025, Idorsia reported Scope 2 greenhouse gas (GHG) emissions of 14.5 tCO₂e without specifying the calculation method.a
Since 2022, Idorsia's Scope 2 greenhouse gas (GHG) emissions (Unspecified Calculation Method) have decreased by 96.38%, reflecting a declining long-term trend in Scope 2 emissions over time.ab
Compared to the previous year (2024), Idorsia's Scope 2 emissions (Unspecified Calculation Method) fell by 50.34% in 2025, showing that the company has made progress in taking action to reduce the climate impact of its energy consumption.a
In 2025, Idorsia reported its Scope 2 emissions using an unspecified methodology.a
In 2025, Idorsia reported 28,387.3 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 Idorsia includes a breakdown across 11 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, Idorsia reported total Scope 3 emissions of 28,387.3 metric tons of CO₂ equivalent (tCO₂e).a
Approximately 94.38% of these emissions originated from upstream activities such as purchased goods and capital goods, while 5.62% came from downstream activities like product use, distribution, and end-of-life treatment.a
Compared to the previous year (2024), Idorsia's Scope 3 emissions decreased by 29.89%, highlighting the company's efforts to lower indirect emissions from its value chain.a
In 2025, Idorsia reported emissions for 11 out of the 15 Scope 3 categories defined by the GHG Protocol.a
This reflects a high level of granularity and transparency in the company's emissions reporting.
In 2025, the largest contributors to Idorsia's Scope 3 emissions were:a
In 2025, Idorsia reported Scope 1 greenhouse gas (GHG) emissions of 632 tCO₂e and total revenues of USD 278 millions. This translates into an emissions intensity of 2.27 tCO₂e per millions USD.a
In 2025, Idorsia reported a Scope 1 emissions intensity of 2.27 tCO₂e per millions USD. Compared to the peer group median of 4.54, this places the company below its industry benchmark, indicating it is more carbon-efficient than most competitors.a
In 2025, Idorsia ranked 9 out of 22 companies in its industry peer group, based on Scope 1 emissions intensity (measured in tCO₂e per millions USD).a
Idorsia is therefore positioned in the mid-range of its industry, neither a clear leader nor a laggard in carbon efficiency.a
In 2025, Idorsia reported a total carbon footprint of 29,033.8 metric tons of CO₂ equivalent (tCO₂e) across Scope 1, Scope 2, and Scope 3 emissions. This represents a 29.61% decrease compared to 2024, indicating progress in reducing its overall greenhouse gas output.a
The largest contributor to Idorsia's total carbon footprint was Scope 3 emissions, accounting for 97.77% of the company's total carbon footprint, followed by Scope 1 emissions at 2.18%.a