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IRS 990-PF profile

SIDENER FOUNDATION

Saint Louis, MO · EIN 510189216 · Data as of July 31, 2026

Can an organization apply?

Yes. Its 2024 filing describes how to apply.

Application timing as written in that filing: “November 1 to November 30” This is historical filing information.

How to apply, from its own filing

Contact
Jill Gray / 3149910730
Address
PO Box 28568, St Louis, MO, 63146
Form and process
Letter of inquiry. Include copy of IRS Determination Letter.
Restrictions
Preference is given to St. Louis area charities.

own 990-PF filing, 2024. Filed text, not a live application channel. Names, addresses and deadlines age quickly; confirm against current first-party guidance before sending anything.

Giving reported · 2025
$119,000
Assets reported
$2,402,070
Median grant
$3,000
Latest filing year
2024

Where its recorded grants went

Recipient location in the quality-gated IRS record.

MO74 award lines

Large examples from the latest covered year

A small sample of the largest organizational grants in the latest covered filing year.

Up to three largest organizational grant examples in the latest covered tax year, with one example per normalized recipient. Named people are omitted. Open the grant records to read each grant’s purpose as written on the filing.

Explore this foundation more deeply

Open a dedicated research view to search, filter, and move through the quality-gated records.

Grant records from covered filingsIncluded free74 grant recordsSearch every covered organizational grant record by recipient, state, tax year, and amount.Repeat grantees and giving patternsIncluded free9 repeat granteesFind recipients appearing across multiple covered filing years.Foundation grantees with federal award recordsProResearch registry-corroborated organizations that appear in both this foundation’s records and USAspending.Leadership listed in public filingsProPublic filing context for governance research

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What this data is, and what it is not
  • Source: IRS 990-PF filings, grant schedules, and Business Master File identity data.
  • Privacy: Grant recipients that read as named individuals are withheld unless the IRS Business Master File corroborates an organization of that name in that state. Withheld lines are absent from every count and total on this page..
  • Interpretation: Historical grants do not establish current mission, eligibility, application status, or likelihood of future funding.

An award-line count is the number of individual grant lines reported across covered IRS filings, before the grant search groups lines that share the same recipient, amount, and tax year into a single displayed record.