Colegio Internacional SEK-El Castillo

What Colegio Internacional SEK-El Castillo does

Colegio Internacional SEK-El Castillo is a private bilingual (Spanish/English) international school located on a 40,000+ m² campus in Villanueva de la Cañada, northwest Madrid. Founded in 1973, it serves students from 4 months through 18 years of age, delivering the full International Baccalaureate (IB) continuum (PYP, MYP, and Diploma Programme) integrated from age 3 to 18. The school is a pioneer among institutions offering all three IB programmes in a unified curriculum and holds NEASC, CIS, and IB World School accreditations. Its student body represents over 40 nationalities, with boarding facilities accommodating students from 15+ nationalities.

The school's core product portfolio includes the main IB academic programme, the SEK International Sports Academy for high-performance athletics, an international boarding residence, summer courses, the Duke of Edinburgh's International Award, EAL/SAL language support, arts programming, and a vocational equestrian training track (Ciclo Formativo de Grado Medio en Equitación). Supporting technology infrastructure includes the MySEK parent/student portal, virtual tour capabilities, online enrollment systems, and facial recognition-based online proctoring for assessments. Methodological differentiators include the Future Learning Model (Intelligent Classroom design), the RULER emotional intelligence framework, and the Hive (La Colmena) challenge-based learning methodology shared with affiliated Camilo José Cela University.

The business model is tuition-driven through direct-to-consumer admissions: families contact the school via website, phone (+34 900 878 798), or campus visits to receive personalized quotes, with multi-year contracts covering the educational continuum. Pricing is not publicly disclosed. Supplementary revenue streams include boarding fees, summer programmes, and international academic stays in Ireland, France, and Spain. SEK-El Castillo operates as a wholly-owned subsidiary of SEK Education Group (Institución Educativa SEK, S.L.), a diversified educational conglomerate with 130+ years of heritage operating 10+ international schools across Spain, Ireland, France, Qatar, Saudi Arabia, Oman, and Bahrain. Distribution is campus-based with international student recruitment supported by the SEK Group network.

Name

Colegio Internacional SEK-El Castillo

Legal name

SEK EL CASTILLO, S.L

Website

https://elcastillo.sek.es

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

11–50 employees

Short description

Colegio Internacional SEK-El Castillo is a private bilingual Spanish/English international school in northwest Madrid, serving students from 4 months to 18 years through the full IB continuum (PYP, MYP, DP), boarding, and sports programs, as part of SEK Education Group.

Ownership category

akta.pro rank

Product category

Private International K-12 Education

NAICS

Educational Services (611), Educational Services (61)

SIC

Services-Educational Services (8200)

akta.pro primary industry

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

akta.pro secondary industries

English Learner (EL/ESL/ELL) & Bilingual Education Programs (EDAJAGAB), Hybrid, Multi-Location & Multi-Country Study Abroad Programs (EDAIAAAE)

Keywords

• International school education
• Bilingual K-12 programs
• International Baccalaureate continuum
• Boarding residence services
• High-performance sports academy

Headquarters

HQ city

Villafranca del Castillo

HQ country

Spain

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales, Others

Revenue model

1. Tuition Fees: Private education tuition covering all educational stages from 4 months (Early Childhood) through 18 years (Baccalaureate), including IB Diploma Programme. Tuition is the primary revenue stream for this private international school.
2. Boarding/Residence Fees: International boarding facilities for male and female students, accommodating students from 15 nationalities. Boarding fees supplement tuition revenue for residential students.
3. Summer Programs: Summer courses and experiences offered during school breaks, providing additional revenue streams for the institution.
4. International Academic Stays: Academic exchange programs in Ireland, France, and Spain that generate program fees for international educational experiences.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Colegio Internacional SEK-El Castillo delivers bilingual Spanish/English international education from 4 months through 18 years on a 40,000+ m² campus in the northwest of Madrid, anchored on the full International Baccalaureate continuum (PYP, MYP, DP). It supplements core academics with an international boarding residence, the SEK International Sports Academy for high-performance athletes, summer courses, the Duke of Edinburgh's International Award, EAL/SAL language support, arts programs, and equestrian vocational training.

Product overview

Colegio Internacional SEK-El Castillo is a private international school providing comprehensive educational services from early childhood (4 months) through baccalaureate (18 years). The core offering is bilingual Spanish/English international education featuring the complete International Baccalaureate (IB) program continuum (PYP, MYP, DP). The school operates on a 40,000+ m² campus and offers integrated supplementary programs including SEK International Sports Academy for high-performance athletics, international boarding residence accommodating students from 15+ nationalities, summer courses, Duke of Edinburgh's International Award, EAL/SAL language support classes, arts education, equestrian vocational training, and the MySEK parent/student portal. All programs are delivered under SEK Education Group's quality framework with over 130 years of educational heritage.

Differentiator

Problem solved

Functional benefit

Products and services

• SEK International School El Castillo Main Educational Program Bilingual Spanish/English private international education from nursery (4 months) through baccalaureate (18 years), integrating the IB continuum and the SEK educational model on a 40,000+ m² campus for international and Spanish families.
• International Baccalaureate (IB) Programs Full IB program continuum (Primary Years, Middle Years, and Diploma Programmes) integrated from ages 3 to 18, leading to internationally recognized IB credentials.
• SEK International Sports Academy High-performance athletic development program combining elite sports training with academic instruction, supporting student athletes within SEK Education Group.
• International Boarding Residence Residential boarding facilities for male and female students from 15+ nationalities offering supervised study, cultural exchange, and high-performance athlete support on the school campus.
• Summer Courses Summer courses and experiences offered during school breaks, complementing the regular academic year with thematic and language-immersion content.
• Duke of Edinburgh's International Award International personal development award delivered through voluntary service, skills, physical recreation, and adventurous journey components for enrolled students.
• EAL/SAL Language Classes Dedicated language support classes for students learning English as an Additional Language (EAL) or Spanish as an Additional Language (SAL) to support bilingual instruction.
• The Arts Program Comprehensive arts education covering visual arts, music, and performing arts integrated across the school's educational stages.
• Ciclo Formativo de Grado Medio en Equitación (Equestrian Vocational Training) Intermediate-level vocational training program focused on equestrian skills and horse management for students seeking specialized sports-vocational pathways.
• Learning Adventures / International Academic Stays International academic exchange programs with stays in Ireland, France, and Spain, providing students with global learning experiences through SEK Education Group's network.

Quantifiable outcome

• 100% pass rate in PAU 2026 University Entrance Exams
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• HM HospitalescoreStrategic or Co-development Partner · 1 January 2000Camilo José Cela University, part of SEK Education Group, partners with HM Hospitales to lead a pioneering university project in Health Sciences. This partnership provides UCJC students with internship opportunities at prestigious national and international companies and establishes the UCJC HM School of Health Sciences.
• New England Association of Schools and Colleges (NEASC)coreOthersSEK-El Castillo is accredited by NEASC, demonstrating compliance with rigorous educational standards required by one of the most demanding international educational accrediting bodies. This accreditation is recognized globally for university admissions.
• Council of International Schools (CIS)coreOthersSEK-El Castillo is a certified member of CIS, meeting high standards for international education and contributing to the global network of international schools.
• Fundación Felipe SegoviacoreStrategic or Co-development PartnerThe Felipe Segovia Foundation promotes the educational thinking and beliefs that inspired the founder of SEK Education Group to improve educational quality. It projects the ideals of SEK's educational mission.
• Camilo José Cela University (UCJC)coreStrategic or Co-development PartnerUCJC is part of SEK Education Group, founded in 2000. It serves society by educating professionals of the future, with strategic axes in entrepreneurship, technology and digitization, social commitment, and well-being. UCJC operates on SEK campuses including Villafranca del Castillo.
• International Baccalaureate Organization (IBO)coreOthersSEK-El Castillo is an IB World School, authorized to offer the full continuum of IB programmes (PYP, MYP, DP) from age 3 to 18. School participates in IB examinations and achieves above-global-average results.
• IRSST (Instituto Regional de Seguridad y Salud en el Trabajo)minorStrategic or Co-development PartnerIRSST collaborates with SEK-El Castillo on Prevention Week programs, providing expertise on safety, health, and wellbeing for primary school students, in partnership with the Regional Ministry of Education, Science and Universities.
• Fundación AMÁSminorStrategic or Co-development PartnerFoundation focused on improving quality of life for people with intellectual disabilities and their families. SEK-El Castillo collaborates through House System solidarity activities and workshops with MYP students on Autism Spectrum Disorder awareness.
• B Corp CertificationcoreOthersSEK Education Group is certified as a B Corp, demonstrating commitment to sustainability, innovation, and positive impact on society. UCJC is the first university in Spain with this certification.

Scale indicators9 records

Recent moves7 records

Expansion highlights5 records

Market position

Competitive moat6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/colegio-internacional-sek-el-castillo

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Colegio Internacional SEK-El Castillo