Sumatran Orangutan Society
Also known as: Sos
SOS works to protect orangutans, their forests and their future. We fund partners and projects that support the long-term conservation of Sumatran orangutans and their habitat, scale up the reach and impact of conservation programmes, and advocate for Sumatran orangutans and their rainforest home.
Activities & Mission
SOS works to protect orangutans, their forests and their future. We fund partners and projects that support the long-term conservation of Sumatran orangutans and their habitat, scale up the reach and impact of conservation programmes, and advocate for Sumatran orangutans and their rainforest home.
Areas of Operation
Where this charity is registered to operate, as self-declared to the Charity Commission. These are regulatory classifications, not a list of active programmes, and don't necessarily indicate fundraising activity in each location.
Country
Financial Information
Financial Efficiency
Higher than 34% of UK Environment charities with income £1M to £10M (sample: 234). How is this calculated?
Higher than 29% of UK Environment charities with income £1M to £10M. How is this calculated?
Lower overhead than 24% of UK Environment charities with income £1M to £10M. (Lower overhead is generally read as more efficient.) How is this calculated?
Latest Financial Breakdown
Income Sources
Expenditure Categories
Financial Trend
Annual Returns
As filed with the Charity Commission for England and Wales. Most recent filing covers the financial year ending 2025.
| Financial Year | Income | Expenditure | Charitable Spending | Net Assets | Reserves | Staff |
|---|---|---|---|---|---|---|
| 2025 | £1,057,822 | £940,883 | £760,686 | £384,626 | £332,479 | 7 / 0 |
| 2024 | £840,226 | £832,466 | £680,013 | £267,687 | £267,687 | 7 / 3 |
| 2023 | £997,242 | £915,573 | £774,191 | £259,927 | £220,787 | 5 / 0 |
| 2022 | £579,436 | £575,637 | £459,796 | £178,258 | £178,258 | 3 / 2 |
| 2021 | £449,298 | £369,619 | 0 / 0 |
Staff column shows: Employees / Volunteers
Frequently asked questions about Sumatran Orangutan Society
What does Sumatran Orangutan Society do?
SOS works to protect orangutans, their forests and their future. We fund partners and projects that support the long-term conservation of Sumatran orangutans and their habitat, scale up the reach and impact of conservation programmes, and advocate for Sumatran orangutans and their rainforest home.
How much income did Sumatran Orangutan Society report in 2025?
Sumatran Orangutan Society reported total income of £1.06m and reported expenditure of £941k for the financial year ending 2025, based on the most recent annual return filed with the Charity Commission.
How efficient is Sumatran Orangutan Society?
Sumatran Orangutan Society has a program ratio of 71.9%, meaning that share of its income goes directly to charitable activities. This is higher than 34% of UK Environment charities with income £1M to £10M (sample of 234 charities). See our methodology for how this is calculated.
When was Sumatran Orangutan Society registered as a charity?
Sumatran Orangutan Society was registered with the Charity Commission for England and Wales on 29 September 2014 as charity number 1158711. It has been registered for 12 years.
Who runs Sumatran Orangutan Society?
Sumatran Orangutan Society is governed by a board of 10 trustees. The chair of trustees is Lauren Curtis. Trustees are legally responsible for the charity's governance and are listed in full on its profile.
Where does Sumatran Orangutan Society operate?
Sumatran Orangutan Society operates in Indonesia, as recorded in its Charity Commission filing.
Is Sumatran Orangutan Society a registered charity?
Yes — Sumatran Orangutan Society is a registered charity in England and Wales, charity number 1158711.
Details
ABINGDON
OXFORDSHIRE
OX14 5BJ
Registry Information
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Trustees
Also governs 1 other charity
Sectors & Classifications
Also Known As
- Sos
Data & trust
- Register data refreshed
- 14 May 2026
- Methodology
- How metrics are calculated