Katherine Mabis McKenna Foundation

Katherine Mabis McKenna Foundation

The Katherine Mabis McKenna Foundation was established in 1969 by Katherine Mabis McKenna in Latrobe, Pennsylvania, memorializing her son Mennel McKenna. The foundation channels its endowment toward education, arts, health, community development, environmental causes, and human services, with a nearly exclusive geographic focus on Westmoreland County. Governance remains under family control, led by Chairman Linda McKenna Boxx, the founder's daughter, alongside Vice Chairman Zan McKenna Rich, Treasurer Nathan M. Boxx, and Director Peter M. Boxx. The foundation functions as a classic private grantmaking entity rather than an investment organization seeking outsized returns. Its roughly $99 million endowment (Altss estimate) is deployed primarily through grants to 501(c)(3) organizations in western Pennsylvania, with no public record of direct investments, co-investments, or alternative asset commitments. The grantmaking portfolio supports institutional anchors like the Valley School of Ligonier — where Treasurer Nathan Boxx serves on the Board of Trustees — alongside health and environmental groups tied to board members' affiliations, including the Western Pennsylvania Conservancy. No venture capital, private equity, or real asset investment activity has been publicly disclosed. The foundation operates with a lean governance structure, listing four family directors and no external investment staff or consultants in public filings. The foundation maintains membership in Grantmakers of Western Pennsylvania, linking it to the regional philanthropic network. No subsequent fundraising rounds, external capital pools, or adjacent investment vehicles appear in public record. The foundation's structural differentiator is its pure grantmaking architecture — it holds endowment assets exclusively to fund charitable distributions, not to generate returns for family wealth. This distinguishes it from hybrid family offices that blend philanthropy with market-rate investing.