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Skyline Foundation
Angela Filo, a former Stanford trustee and ProPublica board member, and David Filo, Yahoo!'s co-founder, established Skyline Foundation in 2000 to return...
Skyline Foundation
Angela Filo, a former Stanford trustee and ProPublica board member, and David Filo, Yahoo!'s co-founder, established Skyline Foundation in 2000 to return internet-era wealth to society. The foundation operates with a 13-person staff, deploying capital exclusively through a private foundation and a separate donor-advised fund. It is headquartered in San Francisco. Skyline pursues a multi-strategy investment posture spanning early-stage venture, growth, buyouts, distressed debt, and fund-of-funds commitments, weighted toward direct alignment with its programmatic goals. The endowment screens out industries causing environmental or social harm, and a growing allocation goes to funds and companies advancing climate solutions, birth justice, equity in education, and just democracy. In 2025, the foundation funded 207 grantees, deploying $101M. Angela Filo serves on ProPublica's board of directors and on the Doerr School of Sustainability Advisory Council at Stanford University; both organizations are grantees and advisory affiliations, not co-investors. Since its founding, the foundation has made over 330 grants, totaling $502M as of 2025. The team operates from a single location in San Francisco, led by a board of the two founders. Skyline is a signatory to the Trust-Based Philanthropy Project and maintains active advisory relationships with Stanford and UC Berkeley's Graduate School of Journalism. The foundation rebranded in June 2023 from Yellow Chair Foundation. Unlike most private foundations that separate investment and program functions, Skyline's public commitment to screening its entire endowment for ESG alignment and directly investing in mission-aligned vehicles blurs the line between grantmaking and portfolio management. This structural integration means program officers and the board can direct capital across the full spectrum — from philanthropic grants to co-investments — without internal silos.
General information
Firm type
Endowment / Foundation
Year founded
2000
Location
Region
North America
Country
United States
City
San Francisco
Corporate office
1660 Bush St #300, San Francisco, CA 94109, United States
Principals
Angela Filo
Co-Founder & Board Member
David Filo
Co-Founder & Board Member
Sector focus
Frequently asked questions
Who runs investment decisions at Skyline Foundation?
The foundation operates under the board leadership of co-founders Angela and David Filo. A small internal staff of 13 manages grantmaking and mission-aligned investments, with Angela Filo's extensive board experience — including ProPublica and Stanford's sustainability council — informing strategy. The foundation does not publicly name a separate CIO.
How does Skyline Foundation balance its grantmaking with impact investing?
Skyline screens its entire endowment for ESG harm and directs a growing proportion into funds and companies that reinforce its program areas — climate, education, birth justice, and democracy. This creates a single capital continuum: the same team deploys both philanthropic grants and mission-related investments, blurring the traditional foundation division between program and investment staff.
Does Skyline Foundation participate in fund commitments or only direct deals?
Skyline employs a mixed approach. Its disclosed strategy includes direct early-stage and growth investments, buyouts, distressed debt, and fund-of-funds commitments. The foundation does not separate its direct investment and fund commitment activities, treating both as instruments for advancing its mission.
Which sectors does Skyline Foundation avoid?
The foundation's endowment is screened to exclude industries and companies that cause environmental or social harm. While specific exclusion lists are not published, the public commitment to values-aligned investing implies a prohibition on fossil fuel extraction, weapons manufacturing, and predatory financial services, consistent with its climate and justice mandates.
What is Skyline's relationship with ProPublica?
ProPublica is both a major grantee and a governance connection: Angela Filo serves on ProPublica's board of directors. Skyline Foundation has provided sustained funding to the nonprofit newsroom, reflecting the founders' commitment to journalism as a tool for systemic accountability — a focus rooted in Angela Filo's advisory role at UC Berkeley's Graduate School of Journalism.
How is Skyline Foundation related to the Yellow Chair Foundation?
Skyline Foundation operated as the Yellow Chair Foundation from its founding in 2000 until June 2023. The rebranding to Skyline Foundation occurred alongside a strategic refresh that emphasized growing direct, mission-aligned allocations within the endowment and a clearer public articulation of its program priorities.
Where does Skyline Foundation's wealth originate?
The foundation's assets derive entirely from the wealth created by David Filo as co-founder of Yahoo!, the early internet search and services company. Angela and David Filo established the foundation in 2000, shortly after Yahoo!'s peak valuation, with an explicit mission to return that wealth to society through systemic philanthropy.
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