Private Foundation

HALVORSEN FAMILY FOUNDATION C/O OLE ANDREAS HALVORSEN TRUSTEE

Based in STAMFORD, CT, HALVORSEN FAMILY FOUNDATION C/O OLE ANDREAS HALVORSEN TRUSTEE operates as a Private Foundation. The organization reported $35.2M in revenue, $34.5M in expenses, $365.4M in total assets for fiscal year 2025. Imperigo tracks 121 reported grants from this foundation totaling approximately $107.6M.

EIN: 061603158 STAMFORD, CT Latest filing: 2025

Total Revenue$35.2M

Total Expenses$34.5M

Total Assets$365.4M

Grants Given121

Grant Total$107.6M

Filing Years2021–2025

Sample Grants Given

STANFORD MEDICAL DEVELOPMENT

REDWOOD CITY, CA · 2024

EDUCATIONAL SUPPORT

$20,000,000

STERLING AND FRANCINE CLARK ART INSTITUTE

WILLIAMSTOWN, MA · 2024

ARTISTIC INITIATIVES

$5,125,000

MEMORIAL SLOAN KETTERING CANCER CENTER

WEST HARRISON, NY · 2024

MEDICAL SUPPORT

$5,000,000

GREEN MOUNTAIN VALLEY SCHOOL

WAITSFIELD, VT · 2024

EDUCATIONAL SUPPORT

$1,500,000

WEILL CORNELL MEDICINE

NEW YORK, NY · 2024

MEDICAL SUPPORT

$1,000,000

Showing up to 5 of 121 total records — full history available with membership.

Officers & Directors

TRUSTEE Diane K Halvorsen

TRUSTEE Ole Andreas Halvorsen

Officer compensation and complete director data available with membership.

Top Grant Purposes

EDUCATIONAL SUPPORT

$58,111,866 30 grants

MEDICAL SUPPORT

$17,814,260 20 grants

GENERAL SUPPORT

$14,889,750 14 grants

ARTISTIC INITIATIVES

$13,624,000 12 grants

ATHLETIC OPPORTUNITIES

$1,801,000 16 grants

Financial Trends

Year	Revenue	Expenses	Assets
2025	$35.2M	$34.5M	$365.4M
2024	$21.4M	$21.1M	$322.0M
2023	$15.5M	$14.6M	$265.6M
2022	$4.0M	$13.3M	$235.3M
2021	$4.3M	$9.3M	$301.4M

Between 2021 and 2025, reported annual revenue grew from $4.3M to $35.2M (+724%), with total assets most recently reported at $365.4M.

Interactive year-over-year charts and full filing details available with membership.

Grant Geography

Grants from this foundation were reported to recipients in CA, CT, MA, ME, MN, NY, and 3 other states.

CACTMAMEMNNYPAUTVT

Full geographic grant map with state-by-state breakdown available with membership.

See the full picture for HALVORSEN FAMILY FOUNDATION C/O OLE ANDREAS HALVORSEN TRUSTEE

Complete financials, all 121 grant records, officer compensation, year-over-year trend charts, a geographic grant map, and data exports — across 498,000+ organizations.

Full Financial History Complete Grant Activity Officer Compensation Year-over-Year Charts Geographic Grant Map Data Exports