Private foundation · EIN 84-3901549 · Locust Valley, New York · Philanthropy & grantmaking

Harry F Mariani Family Foundation

Should you approach them?

Don't send a cold proposal. The foundation reports that it only gives to preselected organizations; an introduction through a current grantee or board member is the realistic route.

From the 2025 Form 990-PF: 14 grants paid, $272K total, median $10K. 21% of grants stayed in New York.

Accepts applications
No
per 990-PF Part XV
Grants paid, 2025
14
$272K
Median grant
$10K
Stays in NY
21%
of grants
Deadline
—
Assets
$5.8M

Grants paid in 2025

14 grants, all shown · from Form 990-PF Part XV

RecipientPurposeAmount
Tisch Multiple Sclerosis Research Center New York IncNew York, NYGeneral support$68K
Northwell Health FoundationHuntington, NYGeneral support$56K
The Beaufort County Open Land Trust IncBeaufort, SCGeneral support$50K
Pingree SchoolSouth Hamilton, MAGeneral support$27K
University of Notre DameNotre Dame, INGeneral support$25K
The Don Monti Memorial Research FoundationCold Spring Harbor, NYGeneral support$12K
Coastal Conservation Association South CarolinaColumbia, SCGeneral support$10K
Tulane UniversityDallas, TXGeneral support$10K
St Joseph's Children's Hospital TampaTampa, FLGeneral support$4,000
Community Dispute Settlement CenterCambridge, MAGeneral support$3,000
Minuteman Senior ServicesBedford, MAGeneral support$3,000
North Charleston Animal SocietyNorth Charleston, SCGeneral support$1,500
Lowcountry Food BankCharleston, SCGeneral support$1,500
One80 PlaceCharleston, SCGeneral support$1,000

By state: New York 3 · South Carolina 5 · Massachusetts 3 · Indiana 1 · Texas 1 · Florida 1

About this foundation

Harry F Mariani Family Foundation is a private grantmaking foundation in Locust Valley, New York, administered in care of James W Mariani, tax-exempt since 2020. Private foundations must pay out roughly 5% of their assets each year, mostly as grants to 501(c)(3) public charities.

All filings on ProPublica

Does Harry F Mariani Family Foundation accept grant applications?

No. On its 2025 Form 990-PF the foundation checked that it only makes contributions to preselected organizations. Look for an introduction through a current grantee.

How much does Harry F Mariani Family Foundation give each year?

In tax year 2025 it paid $272K across 14 grants, a median of $10K.

Where does Harry F Mariani Family Foundation give?

New York (3 grants), South Carolina (5 grants), Massachusetts (3 grants) and elsewhere, per its latest filing.

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