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Bellingcat has published their 2023 Annual Report:
https://www.bellingcat.com/app/uploads/2024/06/Annual-Report-3.pdf
If you'd rather not follow a direct link to the pdf, you can go to their main page (https://www.bellingcat.com/), click on 'General Information' at the bottom of the page, and scroll down a bit to the 'Annual Reports' section.