Private foundation · EIN 82-2289585 · Wilmington, Delaware · Philanthropy & grantmaking

Mainwaring 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: 10 grants paid, $197K total, median $12K.

Accepts applications
No
per 990-PF Part XV
Grants paid, 2025
10
$197K
Median grant
$12K
Stays in DE
—
of grants
Deadline
—
Assets
$19M

Grants paid in 2025

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

RecipientPurposeAmount
Helena SymphonyHelena, MTUnrestricted gift$65K
Holter Museum of ArtHelena, MTGeneral purpose$45K
American Prairie FoundationBozeman, MTGeneral purpose$15K
Prickly Pear Land TrustHelena, MTGeneral purpose$15K
Helena Food ShareHelena, MTGeneral purpose$12K
Montana Food Bank NetworkMissoula, MTGeneral purpose$12K
Glacier Two Medicine AllianceEast Glacier Park, MTGeneral purpose$10K
Planned Parenthood of MontanaBillings, MTGeneral purpose$10K
Omerta Arts SyndicateHelena, MTGeneral$7,538
H-Town Eagles Boxing ClubHelena, MTGeneral$5,000

About this foundation

Mainwaring Family Foundation is a private grantmaking foundation in Wilmington, Delaware, administered in care of Scott a Mainwaring, tax-exempt since 2017. 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 Mainwaring 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 Mainwaring Family Foundation give each year?

In tax year 2025 it paid $197K across 10 grants, a median of $12K.

Where does Mainwaring Family Foundation give?

Montana (10 grants), per its latest filing.

More foundations near Wilmington that accept applications

All in Delaware
FoundationBased inGrants paidMedian grantAccepts applicationsAssets
Shelby Cullom Davis Charitable Fund Incsince 2006 Wilmington, DE $120M118 grants · 2024 $200KPreselected only $3.5B
Aurora Foundationsince 2015 Wilmington, DE $54M1 grants · 2024 $54MPreselected only $663M
Longwood Foundation Incsince 1940 Wilmington, DE $41M94 grants · 2024 $202KYes $807M
La Vida Feliz Foundationsince 2009 Wilmington, DE $25M2024 —Preselected only $507M
Essex Avenue Foundationsince 2021 Wilmington, DE $28M77 grants · 2024 $300KPreselected only $698M
The Champlin Foundationsince 1976 Wilmington, DE $18M2023 —Not stated $422M
Erik E and Edith H Bergstrom Foundation a Charitable Trustsince 2002 Wilmington, DE $11M50 grants · 2024 $141KPreselected only $203M
Head & Heart Foundation Trsince 2020 Wilmington, DE $13M86 grants · 2025 $100KPreselected only $272M
Email me matching grants