Euronext announces the September 2025 review of its CAC 40 ESG® index, adding Teleperformance and tightening company inclusion criteria amid ongoing adjustments to enhance transparency and market relevance.
Euronext has just announced the results of its quarterly review for the CAC 40 ESG® index for September 2025. These changes are set to take effect starting Monday, the 22nd of September, 2025. Now, one notable update is that Teleperformance will be included this time around, while Euronext itself will be removed from the index. It’s worth noting that the Independent Supervisor still holds the power to tweak the official selection—say, in cases like mergers or takeovers—right up until the final data gets published after the market closes on Wednesday, the 17th of September, 2025. Any events that happen after that date won’t lead to replacements of companies that have already been taken out of the list.
The CAC 40 ESG® index isn’t reviewed randomly; it follows a strict quarterly schedule—March, June, September, and December. The upcoming review by the CAC Steering Committee is scheduled for December 11, 2025. Interestingly enough, the methodology used to compile the index was updated starting with the June 2025 review. The key change was the addition of an “investable universe,” which now is limited to the companies already included in the CAC 40 index itself. This tweak basically means that the index now adopts a somewhat stricter focus—only on companies that are considered suitable for sustainable investments within the French market benchmark.
To put this update in context, back in June 2025, the review brought about more substantial shifts. Five companies made it into the index, including Bouygues and Dassault Systèmes. On the flip side, seven companies were excluded—like ADP and Alstom. Before that, the March 2025 review didn’t change anything after a consultation phase, though it did hint at possible future modifications to the methodology. If you look further back into 2024 and 2023, some reviews also resulted in no changes to the index’s makeup. That period seemed to be about stabilising and refining the approach before the more active changes that started to happen mid-2025.
Overall, these quarterly reviews are meant to strike a balance—keeping the index stable enough for investors but also responsive enough to reflect ESG performance and market shifts. They’re designed to stay aligned with evolving sustainability standards and investor expectations. The role of the Independent Supervisor is pretty important here—they oversee these adjustments, ensuring good governance and that the index remains accurate. Plus, they have the authority to respond to corporate events, like takeovers, which could influence the composition even after an initial decision has been announced. It’s like an extra layer of oversight to keep everything transparent.
In the end, these periodic updates highlight Euronext’s ongoing commitment to fine-tuning the CAC 40 ESG® index. Their goal is to make it a more reliable tool for sustainable investing—one that reflects market realities and evolving ESG criteria, all while maintaining transparency and proper regulation. Honestly, I find it pretty interesting how these mechanisms work to keep the index relevant and trustworthy over time.
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Source: Noah Wire Services
Verification / Sources
- https://mondovisione.com/media-and-resources/news/euronext-announces-september-2025-quarterly-review-results-of-the-cac-40-esg-2025911/ - Please view link - unable to able to access data
- https://www.euronext.com/en/about/media/euronext-press-releases/euronext-announces-june-2025-quarterly-review-results-cac-40 - Euronext announced the results of the June 2025 quarterly review for the CAC 40 ESG® index, effective from 23 June 2025. The review led to the inclusion of Bouygues, Dassault Systèmes, EssilorLuxottica, Eurofins Scientific, and Stellantis, while ADP, Alstom, Arkema, Gecina, Klépierre, Rexel, and Sodexo were excluded. The index methodology incorporated rule changes effective from the June 2025 review, including the introduction of the index investable universe, now consisting of companies included in the CAC 40 index. The Independent Supervisor retains the right to change the published selection until the publication of the final data after close of Wednesday 18 June 2025. All events taking place after that date will not result in the replacement of any company that may need to be removed from the final index selection. The CAC 40 ESG® is reviewed quarterly (March, June, September, December). The next CAC Steering Committee Review is scheduled for Thursday 11 December 2025.
- https://www.euronext.com/en/about/media/euronext-press-releases/euronext-announces-march-2025-quarterly-review-results-cac-40 - Euronext announced the results of the March 2025 quarterly review for the CAC 40 ESG® index, effective from 24 March 2025. The review resulted in no changes to the composition of the index. Following the index consultation held from 27 November 2024 to 31 December 2024 and ongoing assessments regarding the index methodology, the Independent Supervisor decided to keep the composition of the CAC 40 ESG® index unchanged, pending further potential rule changes which will be consulted upon with the market. The Independent Supervisor retains the right to change the published selection until the publication of the final data after close of Wednesday 19 March 2025. All events taking place after that date will not result in the replacement of any company that may need to be removed from the final index selection. The CAC 40 ESG® is reviewed quarterly (March, June, September, December). The next CAC Steering Committee Review is scheduled for 12 June 2025.
- https://www.euronext.com/en/about/media/euronext-press-releases/euronext-announces-september-2024-quarterly-review-results-cac - Euronext announced the results of the September 2024 quarterly review for the CAC 40 ESG® index, effective from 23 September 2024. The review led to the inclusion of ADP and Thales, while Air France-KLM and Valeo were excluded. The Independent Supervisor retains the right to change the published selection until the publication of the final data after close of Wednesday 18 September 2024. All events happening after that date will not lead to a replacement of the selected company that possibly needs to be removed from the final selection. The CAC 40 ESG® is reviewed quarterly (March, June, September, December). The next CAC Steering Committee meeting is scheduled for Thursday 12 December 2024.
- https://www.euronext.com/en/about/media/euronext-press-releases/euronext-announces-june-2024-quarterly-review-results-cac-40 - Euronext announced the results of the June 2024 quarterly review for the CAC 40 ESG® index, effective from 24 June 2024. The review resulted in no changes to the composition of the index. The Independent Supervisor retains the right to change the published selection until the publication of the final data after close of Wednesday 19 June 2024. All events happening after that date will not lead to a replacement of the selected company that possibly needs to be removed from the final selection. The CAC 40 ESG® is reviewed quarterly (March, June, September, December). The next CAC Steering Committee meeting is scheduled for 12 September 2024.
- https://www.euronext.com/en/about/media/euronext-press-releases/euronext-announces-march-2024-quarterly-review-results-cac-40 - Euronext announced the results of the March 2024 quarterly review for the CAC 40 ESG® index, effective from 24 March 2024. The review resulted in no changes to the composition of the index. The Independent Supervisor retains the right to change the published selection until the publication of the final data after close of Wednesday 19 March 2024. All events taking place after that date will not result in the replacement of any company that may need to be removed from the final index selection. The CAC 40 ESG® is reviewed quarterly (March, June, September, December). The next CAC Steering Committee Review is scheduled for 12 June 2024.
- https://www.euronext.com/en/about/media/euronext-press-releases/euronext-announces-september-2023-quarterly-review-results-cac-40 - Euronext announced the results of the September 2023 quarterly review for the CAC 40 ESG® index, effective from 23 September 2023. The review led to the inclusion of Renault, while Biomerieux was excluded. The Independent Supervisor retains the right to change the published selection until the publication of the final data after close of Wednesday 14 June 2023. All events happening after that date will not lead to a replacement of the selected company that possibly needs to be removed from the final selection. The CAC 40 ESG® is reviewed quarterly (March, June, September, December). The next CAC Steering Committee meeting is scheduled for 7 September 2023.
Noah Fact Check Pro
The draft above was created using the information available at the time the story first emerged. We've since applied our fact-checking process to the final narrative, based on the criteria listed below. The results are intended to help you assess the credibility of the piece and highlight any areas that may warrant further investigation.
Freshness check
Score: 10
Notes: The narrative is based on a press release from Euronext, dated 11 September 2025, announcing the results of the quarterly review for the CAC 40 ESG® index, effective from 22 September 2025. This is the earliest known publication date for this information, indicating high freshness. (euronext.com)
Quotes check
Score: 10
Notes: The narrative does not contain any direct quotes, suggesting it is original or exclusive content.
Source reliability
Score: 10
Notes: The narrative originates from Euronext, a reputable organisation, enhancing its reliability.
Plausability check
Score: 10
Notes: The claims about the quarterly review process and the inclusion of Teleperformance in the CAC 40 ESG® index are consistent with Euronext's established practices and recent announcements. (euronext.com)
Overall assessment
Veredict (FAIL, OPEN, PASS): PASS
Confidence (LOW, MEDIUM, HIGH): HIGH
Summary: The narrative is based on a recent press release from Euronext, dated 11 September 2025, announcing the results of the quarterly review for the CAC 40 ESG® index, effective from 22 September 2025. The content is original, sourced from a reputable organisation, and the claims are plausible and consistent with Euronext's established practices. (euronext.com)