Private Foundation

GIGI & AVERELL H MORTIMER FOUNDATION

GIGI & AVERELL H MORTIMER FOUNDATION, of Harriman, NY, is a Private Foundation tracked in Imperigo's IRS 990 database. The 2025 filing shows $599K in revenue, $63K in expenses, $2.0M in total assets. IRS filings disclose 21 grants awarded by this foundation, totaling roughly $388K.

EIN: 464323935 Harriman, NY Latest filing: 2025

Total Revenue$599K

Total Expenses$63K

Total Assets$2.0M

Grants Given21

Grant Total$388K

Filing Years2021–2025

Sample Grants Given

Brandywire Conservancy & Museum of Art

CHADDS FORD, PA · 2025

GENERAL SUPPORT

$15,000

COX SCIENCE CENTRE & AQUARIUM

WEST PALM BEACH, FL · 2025

GENERAL SUPPORT

$10,000

TORY BURCH FOUNDATION

NEW YORK, NY · 2025

GENERAL SUPPPORT

$10,000

PALM BEACH ZOO & CONSERVATION SOCIETY

WEST PALM BEACH, FL · 2025

GENERAL SUPPORT

$10,000

THE CENTRE FOR DISCOVERY

HARRIS, NY · 2025

GENERAL SUPPORT

$5,000

Showing up to 5 of 21 total records — full history available with membership.

Officers & Directors

PRESIDENT/TREASURER Averell H Mortimer

ASSISTANT SECRETARY Hume R Steyer

CHAIRMAN Jean M Mortimer

SECRETARY Maxwell H Mortimer

Officer compensation and complete director data available with membership.

Top Grant Purposes

General Support

$325,350 10 grants

GENERAL SUPPORT

$53,000 10 grants

GENERAL SUPPPORT

$10,000 1 grant

Financial Trends

Year	Revenue	Expenses	Assets
2025	$599K	$63K	$2.0M
2024	$516K	$5K	$1.4M
2023	$359K	$4K	$920K
2022	$103K	$3K	$566K
2021	$163K	$2K	$465K

Between 2021 and 2025, reported annual revenue grew from $163K to $599K (+266%), with total assets most recently reported at $2.0M.

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, FL, NY, PA, TN.

CACTFLNYPATN

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

See the full picture for GIGI & AVERELL H MORTIMER FOUNDATION

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