Stephen Siller Tunnel To Towers Foundation: $373.0M Revenue, $272.2M Expenses

Stephen Siller Tunnel To Towers Foundation grades a B on the NonprofitTruth efficiency rubric. 78/100 on the composite — above the national median, with strong performance on some factors balanced by middling performance on others.

Stephen Siller Tunnel To Towers Foundation is a large nonprofit by U.S. standards: $373.0M in 2023 revenue against $272.2M in expenses. Organizations in this revenue bracket usually run multiple programs with permanent staff and a meaningful endowment or reserve. Financial health is a strength: Stephen Siller Tunnel To Towers Foundation carries a healthy operating-reserve cushion against $272.2M in annual expenses, the kind of balance-sheet stability that helps an organization weather funding gaps without cutting programs.

Revenue has grown meaningfully across the five-year filing history — a sign of expanding donor base, new grants, or scaling programs. Stephen Siller Tunnel To Towers Foundation reported $373.0M in 2023, up notably from the start of the window. Current-officer compensation is not separately reported in the filing — typical for nonprofits where leadership is paid through a related entity (parent system, university, or foundation) rather than the filing organization itself, or for small organizations whose chief is a volunteer or board member. In the Education category, Stephen Siller Tunnel To Towers Foundation sits alongside universities, K-12 systems, scholarship funds, and education-research organizations. Education-sector nonprofits often hold large endowments, which affects how the reserves-and-revenue figures should be read.