{"name":"SIENNA ENERGY LIMITED","company_number":"13654138","status":"Active","type":"Private Limited Company","incorporated":"2021-09-30","dissolved":null,"registered_office":"124 City Road, London, England, EC1V 2NX","postcode":"EC1V 2NX","sic_codes":[{"code":64303,"description":"Activities of venture and development capital companies"}],"principal_activity":null,"previous_names":[],"warnings":[],"accounts":{"category":"Total Exemption Full","year_end":"31 August","last_made_up_to":"2025-08-31","next_due":"2027-05-31"},"employees":{"count":0,"accounts_date":"2025-08-31"},"financials":[{"financial_date":"2025-08-31","net_assets":-27934,"cash":34793,"average_employees":0},{"financial_date":"2024-08-31","net_assets":-46064,"cash":15974,"average_employees":0},{"financial_date":"2023-08-31","net_assets":-37112,"cash":6617},{"financial_date":"2022-08-31","net_assets":-15173,"cash":10743}],"officers":{"current":2,"resigned":0,"complete":true,"note":"Names and details of individual officers are on the People page (subscriber-only on this site) and free at Companies House."},"charges":{"total":null,"outstanding":null},"gazette_notices":[],"insolvency_outcome":null,"ai_summary":null,"website":"https://sienna.energy/","links":{"page":"https://www.companiesintheuk.co.uk/ltd/sienna-energy","people":"https://www.companiesintheuk.co.uk/company/sienna-energy/people","filing_history":"https://www.companiesintheuk.co.uk/company/sienna-energy/filing-history","companies_house":"https://find-and-update.company-information.service.gov.uk/company/13654138","financials":"https://www.companiesintheuk.co.uk/company/sienna-energy/financial","control":"https://www.companiesintheuk.co.uk/company/sienna-energy/control"},"source":"CompaniesInTheUK, from Companies House, The Gazette and other public registers (see /support/about). Cite as: CompaniesInTheUK, https://www.companiesintheuk.co.uk/ltd/sienna-energy"}