Oeiras International School

What Oeiras International School does

Oeiras International School (OIS) is a private, non-profit international school operating as a parent-governed association (Associação Sem Fins Lucrativos) on a five-hectare green campus in Barcarena, Oeiras, Portugal. Founded in 2009 by 30 parents and serving 463 students from 48+ nationalities with 104 staff, the school delivers the full International Baccalaureate Continuum through three core programmes: the Primary Years Programme (PYP, ages 6–10), the Middle Years Programme (MYP, ages 11–16), and the Diploma Programme (DP, ages 17–18). The offering is augmented by IB-mandated components (Theory of Knowledge, Extended Essay, Personal Project, CAS, Service as Action) and a layered extracurricular programme including the Duke of Edinburgh Award, Eco-Schools, After-School Activities, and participation in ISSA international sports tournaments.

The school operates a sales-led admissions motion through OpenApply-based school visits, open days, and structured enrollment, with revenue derived from annual tuition fees plus ancillary streams such as lunch, transportation, and after-school activities. OIS holds NEASC accreditation (2019), CIS membership (2022), and full IB authorization for PYP, MYP, and DP (2021), with a joint CIS/IB re-evaluation scheduled for November 2025. Academic outcomes are strong, evidenced by a 100% IB Diploma pass rate with an average of 35 points (Class of 2021) and MYP personal project scores substantially above global averages. The institution's differentiation rests on its non-selective admissions philosophy, parent-governance structure ensuring all revenue is reinvested, unique natural campus, and a sustainability-focused curriculum delivered through partnerships with the Câmara Municipal de Oeiras, Orca Nation, and other local stakeholders.

Name

Oeiras International School

Legal name

Oeiras International School, Associação Sem Fins Lucrativos

Website

https://ois.pt

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

101–250 employees

Short description

Oeiras International School is a private non-profit IB World School in Barcarena, Portugal, delivering the full IB Continuum (PYP, MYP, DP) to 463 students from 48+ nationalities on a five-hectare campus, with revenue generated from tuition and ancillary fees under a parent-governed association model.

Ownership category

akta.pro rank

Product category

Private International Education (IB Continuum)

NAICS

Elementary and Secondary Schools (6111)

SIC

Services-Educational Services (8200)

akta.pro primary industry

International/Global Curriculum Schools (IB, Cambridge, etc.) (EDAJABAG)

akta.pro secondary industry

Nonsectarian Independent Day Schools (EDAJABAA)

Keywords

• International baccalaureate education
• Primary years programme
• Middle years programme
• IB diploma programme
• Private K-12 schooling

Headquarters

HQ city

Oeiras

HQ country

Portugal

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Tuition Fees: Primary revenue stream from tuition fees covering academic programmes. Fee structure includes tuition, lunch, transportation, and other ancillary services.
2. After-school Activities: Revenue from optional after-school programmes including music, sports, and other extracurricular activities.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Oeiras International School is a private non-profit IB World School delivering the full International Baccalaureate Continuum for students aged 6-18 through three programmes: Primary Years Programme (PYP), Middle Years Programme (MYP), and Diploma Programme (DP). Core offering is supplemented by after-school activities, the Duke of Edinburgh Award, and an Eco-Schools sustainability programme, all delivered on a 5-hectare natural campus in Barcarena, Portugal.

Product overview

Oeiras International School is an IB World School offering a full International Baccalaureate Continuum. The core educational offering consists of three IB programmes: Primary Years Programme (PYP, ages 6-10), Middle Years Programme (MYP, ages 11-16), and Diploma Programme (DP, ages 17-18). These programmes are complemented by IB components including Service as Action, CAS (Creativity, Action, Service), Theory of Knowledge, Extended Essay, and Personal Project. The school also offers extracurricular activities including After-School Activities, The Duke of Edinburgh Award, and the Eco-Schools Programme. The institution operates on a 5-hectare green campus and is governed as a not-for-profit parent association.

Differentiator

Problem solved

Functional benefit

Products and services

• Primary Years Programme (PYP)
• Middle Years Programme (MYP)
• Diploma Programme (DP)
• After-School Activities (ASA)

Quantifiable outcome

• 100% IB Diploma pass rate with average 35 points (Class of 2021)
• +2 more outcomes

Named customers1 record

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Nine partnerships are on record, tiered major, core and minor.

• Câmara Municipal de OeirasmajorStrategic or Co-development Partner · 1 September 2025Partnership with Municipality of Oeiras for COP Oeiras Valley project - a Model UN simulation of UN Conference of Parties focused on climate and energy themes. Students engage in diplomacy, international relations, and environmental advocacy.
• United Nations Association – PortugalmajorStrategic or Co-development Partner · 1 September 2025Co-organiser of COP Oeiras Valley initiative with Câmara Municipal de Oeiras, providing Model UN format simulation for secondary school students across Oeiras.
• OIS Associates (Founding Parents)coreOthers · 1 January 2009Non-profit association founded in 2009 by 30 parents and associates. The school is governed by parent associates who elect the Board every four years. This parent-governance model ensures all revenue is reinvested into the school for student benefit.
• Laço Instituto Medicina Molecular (IMM)minorStrategic or Co-development PartnerPink Day breast cancer awareness partnership. OIS community raises funds through bake sales and donations to support Laço's research efforts toward finding a cure.
• Junta de Freguesia de Barcarena (Parish Council)minorStrategic or Co-development PartnerSocial Grocery project partnership providing essential basics for families in need in Barcarena. School produces vegetables through gardening club for donation to local families.
• Orca NationminorStrategic or Co-development PartnerEnvironmental education organisation that led student session on freshwater ecosystems during Action Week, supporting river conservation education.
• Divisão de Gestão Ambiental da Câmara Municipal de OeirasminorStrategic or Co-development PartnerCollaboration for river clean-up activities and native vegetation planting as part of school's environmental conservation efforts on campus.
• Student BreakthroughminorOthersEducational organisation founded by Sam Moinet providing coaching training for MYP and DP mentors to support student well-being and emotional development.
• ISSA (International Schools Sports Association)minorStrategic or Co-development PartnerOIS joined ISSA in 2022, participating in international sports tournaments including basketball, football, and volleyball against other international schools across Europe.

Scale indicators10 records

Recent moves9 records

Expansion highlights5 records

Direct peers

• United Lisbon International School: Full-IB international school in central Lisbon offering a similar IB Continuum to international families. Direct competitor for the same expat family segment in Greater Lisbon.
• St. Dominic's International School: Private international school serving the Lisbon area with a comparable K-12 offering. St. Dominic's is named in OIS's own staff CVs as a feeder employer, underlining the direct competition for both students and faculty.
• Carlucci American International School of Lisbon: Long-established American international school in Lisbon offering K-12 education to expatriate families. Targets the same international family demographic in the Lisbon metro area with a similar premium independent-school model.
• PaRK International School: Private international school in the Lisbon area serving K-12 students from international families. Comparable size, mission, and target audience to OIS, making it a direct competitor for expatriate enrollments.
• The International School of Lisbon: Independent international school in central Lisbon providing inquiry-based K-12 education to multinational families. Directly comparable model, curriculum philosophy, and catchment to OIS.
• King's College School Lisbon: British-track independent international school in Greater Lisbon serving the same expatriate family segment. Competes on premium K-12 international education in the same geographic market as OIS.

Regional players

• IPS Cascais International Preparatory School: International school located in Cascais, immediately west of Oeiras along the Lisbon coast. While it focuses on lower-year international schooling in a neighbouring municipality, it draws from the same expatriate family pool considering OIS.
• Deutsche Schule Lissabon: German international school in Lisbon offering a German curriculum to expatriate and bilingual families. Broadly comparable in serving Lisbon's international families, though differentiated by national curriculum rather than IB.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/OeirasIntSchool
• Instagraminstagram.com/ois.pt_

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles27 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Oeiras International School