Stoneleigh Foundation

What Stoneleigh Foundation does

Stoneleigh Foundation is a private nonprofit foundation founded in 2006 by John and Chara Haas, headquartered at 123 S. Broad Street in Center City Philadelphia. Its mission is to improve life outcomes for vulnerable and underserved youth by advancing systems change in four priority areas: Youth Justice, Child Welfare, Education, and Health. The foundation pursues this mission primarily through two fellowship programs — the Stoneleigh Fellowship for accomplished leaders and the Emerging Leader Fellowship for early-career professionals — which place Fellows inside host organizations across Greater Philadelphia to undertake multi-year, action-oriented projects.

The foundation's core 'products' are programmatic rather than technological. The Emerging Leader Fellowship is a two-year, full-time placement paying a $60,000 salary in Year 1 with a 3% increase in Year 2, plus up to $2,500 annually for professional development; the foundation typically awards six new placements per cohort. The Stoneleigh Fellowship serves more senior leaders across academic, nonprofit, healthcare, government, and journalism host institutions including Children's Hospital of Philadelphia, Temple University, Drexel University, Rutgers, the Philadelphia Police Department, and Phillips Black. Complementary programs include Youth Partnership Project grants and public convenings on topics such as gun violence prevention and restorative justice.

Stoneleigh's go-to-market is community-led: it recruits exceptional leaders via rolling applications, curates cohorts through staff and Board approval, and sustains a network of current and former Fellows through monthly programming and annual convenings. Revenue derives from an endowment funded by the Haas family; specific revenue figures are not publicly disclosed. The organization operates with a small office team (1-10 employees) and is led, as of May 2026, by Executive Director Joanna Visser Adjoian.

Name

Stoneleigh Foundation

Legal name

Stoneleigh Foundation

Website

https://stoneleighfoundation.org

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

1–10 employees

Short description

Stoneleigh Foundation is a Philadelphia-based nonprofit founded in 2006 that awards multi-year fellowships to leaders advancing systems change for youth in juvenile justice, child welfare, education, and health across Greater Philadelphia.

Ownership category

akta.pro rank

Product category

Youth-Focused Philanthropic Fellowships

NAICS

Grantmaking Foundations (813211), Grantmaking and Giving Services (8132), Religious, Grantmaking, Civic, Professional, and Similar Organizations (813)

SIC

Services-Social Services (8300)

akta.pro primary industry

Education Grantmaking Foundations (BPAGAKAK)

akta.pro secondary industries

Social Justice & Human Rights Grantmaking Foundations (BPAGAKAN), Scholarship & Fellowship Foundations and Trusts (EDADAHAC), Community Foundations (BPAGAKAB)

Keywords

• Youth philanthropy
• Fellowship programs
• Systems change
• Nonprofit grantmaking
• Youth justice

Headquarters

HQ city

Philadelphia

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Others, Personnel, Operations, Marketing or Sales

Revenue model

1. Foundation Grant Making: Stoneleigh Foundation operates as a grant-making organization, awarding fellowships to exceptional leaders who advance change in systems serving youth. The foundation provides multi-year funding that includes salary, benefits, professional development stipends, and project support for Fellows.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Stoneleigh Foundation awards two multi-year fellowship programs—the Stoneleigh Fellowship for accomplished leaders and the Emerging Leader Fellowship for early-career professionals—to exceptional individuals working within and alongside youth-serving systems. The foundation also funds Youth Partnership Projects and hosts public convenings to advance systems change in Youth Justice, Child Welfare, Education, and Health.

Product overview

Stoneleigh Foundation operates two primary fellowship programs (Stoneleigh Fellowship for accomplished leaders and Emerging Leader Fellowship for early-career professionals) that support exceptional individuals working to advance change in youth-serving systems. Additionally, the Foundation funds Youth Partnership Projects and hosts public convenings. All programs focus on four priority areas: Youth Justice, Child Welfare, Education, and Health, with emphasis on systems change in Greater Philadelphia.

Differentiator

Problem solved

Functional benefit

Products and services

• Stoneleigh Fellowship Multi-year funding and support for accomplished leaders to transform systems serving youth. Fellows undertake projects that enhance how systems work together, improve practice, shift narratives, and generate new knowledge through action-oriented research. Awarded on a rolling basis.
• Emerging Leader Fellowship Two-year, full-time, hands-on position for early-career professionals. Fellows work collaboratively with a host organization to execute a project that advances organizational missions while enhancing professional skills and leadership development. Includes a $60,000 salary in Year 1 with a 3% increase in Year 2, plus up to $2,500 annually for professional development expenses.
• Youth Partnership Projects Supports youth-centric organizations that build the leadership and advocacy skills of young people through field-building initiatives.
• Gun Violence Prevention Convenings Public events that convene stakeholders across sectors to deepen and broaden conversation about gun violence, featuring fellows and grantees addressing facets of the crisis.

Quantifiable outcome

• The Girls Health Screen is now standard practice in Los Angeles County juvenile justice system, serving approximately 1,600 girls annually
• +1 more outcomes

Named customers15 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Twelve partnerships are on record, tiered core and minor.

• Erie County GovernmentcoreStrategic or Co-development Partner · 1 January 2021Stoneleigh Fellows led the Multi System Integration Pilot Program in Erie County, demonstrating how to better serve youth involved in multiple systems of care (child welfare, juvenile justice, behavioral health, and education).
• Brady UnitedcoreStrategic or Co-development PartnerHost organization for Emerging Leader Fellow working to increase public understanding of gun violence supply-side issues and hold problematic gun dealers accountable in Philadelphia.
• Healing Hurt People, Drexel University Center for Nonviolence and Social JusticecoreStrategic or Co-development PartnerHost organization for Fellow enhancing understanding of survivors of violence needs and access to Hospital-Based Violence Intervention Program services.
• Health Promotion CouncilcoreStrategic or Co-development PartnerHost organization for Fellow conducting community mapping assessment and audit of youth violence prevention programs.
• Kingsessing Heals Community Resilience CentercoreStrategic or Co-development PartnerHost organization for Fellow developing culturally responsive evaluation framework for Community Resilience Model programming.
• The Nonprofit Center at LaSalle UniversitycoreStrategic or Co-development PartnerHost organization for Fellow developing youth-led gun violence prevention program design model.
• The Village of Arts and HumanitiescoreStrategic or Co-development PartnerHost organization for Fellow developing community organizing and power-building strategy to increase safety in Fairhill-Hartranft neighborhood.
• Campaign for the Fair Sentencing of YouthminorStrategic or Co-development PartnerCo-hosted virtual fireside chat with Common Justice on restorative justice for serious harm.
• Common JusticeminorStrategic or Co-development PartnerCo-hosted virtual fireside chat with Campaign for the Fair Sentencing of Youth on restorative justice.
• Human Rights for KidsminorStrategic or Co-development PartnerCo-hosted virtual convening on trauma-informed approaches and moral injury in nonprofit, philanthropic, and government settings.
• Love Now MediaminorStrategic or Co-development PartnerProduced Breaking Concrete documentary on nature's role in healing from gun violence for young people.
• DayOneNotDayTwominorStrategic or Co-development PartnerProduced documentary 'Safe or Sorry' exploring perspectives on driving forces of gun violence.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Annie E. Casey Foundation: Large national foundation focused on improving outcomes for children and families, particularly those in poverty or involved in child welfare and juvenile justice systems. Operates a fellowship-like program and is a leading funder in the same priority areas as Stoneleigh.
• The Pew Charitable Trusts: Philadelphia-based national foundation that funds policy research and public-interest projects across multiple areas including children and families. Comparable in scale and Philadelphia footprint; broader programmatic mandate.
• Robert Wood Johnson Foundation: Large national health-focused foundation funding health systems research, policy, and community health initiatives. Overlaps with Stoneleigh's health systems priority area, particularly around violence prevention and child health.
• W.K. Kellogg Foundation: National foundation focused on children's wellbeing, racial equity, and community engagement. Direct overlap with Stoneleigh's mission in child welfare, education, and systems change for vulnerable youth.
• Open Society Foundations: Large global foundation that funds criminal justice reform, youth justice, and human rights initiatives, including fellowship programs for emerging leaders. Significant thematic overlap on gun violence prevention and youth justice reform.

Regional players

• William Penn Foundation: Major Philadelphia-based foundation funding education, human services, and the environment in Greater Philadelphia. Directly comparable in geography, scope, and grantmaking model to Stoneleigh.
• The Heinz Endowments: Pittsburgh-based regional foundation funding children, youth, and families, arts, education, and the environment. Comparable family-foundation grantmaking model with a similar systems-change orientation for vulnerable populations.
• The Barra Foundation: Philadelphia-based family foundation supporting innovation in education, health, and human services. Directly comparable in geography, scale, and grantmaking focus on regional systems change.

Direct peers

• Philadelphia Foundation: Greater Philadelphia's community foundation, awarding grants across youth, education, health, and human services. Direct geographic and programmatic peer; both are Philadelphia-based grantmakers serving overlapping priority areas.
• Claneil Foundation: Philadelphia-area family foundation funding health, education, and human services with a focus on systemic change. Comparable mission, geography, and grantmaking approach.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/StoneleighFdn

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Stoneleigh Foundation