Roderick MacArthur Foundation

Invitation Only

Niles, Illinois · EIN 51-0214450 · Private foundation

Grants paid (2024)$5.9M

Organizations funded2

Typical grant$18,611

Total assets$548K

Half of its grants to organizations were between $18,611 and $5,910,500.

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A free check of its grants against your cause and state, starting from Arts & Culture in New York - change them on the next page. You also see the foundations that fit you best, with the grants that show why.

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From the return

How to apply

On its return for tax year 2024 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.

What it funds

Share of grant lines on the latest return, classified from the purpose each grant states.

Arts & Culture1
Education1

Where it gives

100% of grants went outside Illinois.

New York2

Where it gives most, by cause

Its largest causes in a single state on the latest return. Each page shows the leading foundations that fund the same cause there, with their largest grants.

Grants paid in tax year 2024

Recipient	Location	Purpose	Amount
Harper's Magazine Foundation	New York, NY	To support the continuing operations of Harper's Magazine	$5,910,500
Columbia Teachers College	New York, NY	Symposium on Educational Neuroscience of Reading	$18,611

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Grants approved for future payment

Recipient	Location	Purpose	Amount
Harper's Magazine Foundation	new York, NY	To support the continuing operations of Harper's Magazine	$316,250

Giving by year

Tax year	Grants paid	Grant lines
2024	$5,929,111	3
2023	$6,062,700	1

Sources

IRS Form 990-PF, tax year 2024, filed Nov 13, 2025 - IRS e-file batch, object ID 202543179349102719
IRS Tax Exempt Organization Search for EIN 51-0214450
Profile updated Nov 11, 2026

Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.