The Halvorsen Family Foundation ended fiscal 2025 with net assets of $365 million, up from $322 million a year earlier. The private foundation, established by Norwegian-born billionaire Ole Andreas Halvorsen and his wife Diane, distributed more than $34.5 million in charitable grants during the year. Based in Stamford, Connecticut, the organization supports education, healthcare, environmental conservation, arts and culture, economic opportunity, and community development, with much of its grantmaking concentrated in Connecticut and the broader northeastern United States.
Revenue for the year reached approximately $35 million. Total expenses hit $34 million. Net income came in at roughly $634,000. The prior year saw revenue and expenses each at $21 million, with net assets at $322 million.

Ole Halvorsen contributed $34 million
Contributions and gifts accounted for $34 million of the foundation’s revenue, all from Ole Halvorsen. Net gains from security trading added $652 thousand. Gross gains from sales of Viking Global Equities III contributed $469 thousand. Viking Global Opportunities Drawdown generated another $183 thousand.

