Is this your organization? Claim it free
Form 990 for the fiscal year ending December 2025 (IRS tax year 2025).
Midwest Open Source Alliance is an employment nonprofit based in Chicago, IL. For fiscal year 2025 it reported $233K in revenue, $210K in expenses, and $31K in net assets.Pt I
- Type
- Public charity (501(c)(3)) · Employment
- Location
- Chicago, IL
- Filings
- 4 on file (2021–2025)
This section is blank until Midwest Open Source Alliance claims this page.
Know this organization? Claim it to add your story
What Funders Ask
Will my donation be tax-deductible?
GOODYes — A charitable, religious, educational, scientific, or literary organization. Contributions are generally tax-deductible for donors.
IRS Business Master File records this organization as tax-exempt with deductible contributions. See detail →
Can I donate to this org right now?
GOODNo revocation on IRS record
This EIN does not appear on the IRS auto-revocation list. See detail →
Is this organization up to date?
GOODYes — filed FY2025
Most recent Form 990 on file is for fiscal year 2025 (1 year ago). See detail →
Is it receiving grants from reputable foundations?
NEUTRALNo foundation grants on file
No Schedule I/Schedule R grants from other foundations are on file for this EIN. See detail →
How is the money spent?
GOOD84% to programs
84% of total functional expenses went to program services in the most recent filing (Form 990 Part IX); the rest is overhead and fundraising. See detail →
What's its financial size and trend?
NEUTRAL<$100K · ↑ +737% vs prior year
Revenue band <$100K, +737% versus the prior filing year (up). See detail →
Similar organizations you could support
Run this organization? Claim this page
Summary of the Filing
Identity & Classification
Governance & Policies
Officers, Directors & Key Employees
Are you one of these people? Claim this org to confirm your role
Where the work happens
The Midwest Open Source Alliance (MOSA) promotes the education, support, and development of various open source software.
Run this program? Claim this org to tell your story
Statement of Revenue
Statement of Functional Expenses
Balance Sheet
Financial Metrics
Same NTEE category, revenue band, and state where available. Descriptive — not a grade.
| Metric | This org | Peer median | Percentile |
|---|---|---|---|
| Program ratio | 84% | — | — |
| Overhead ratio | 16% | — | — |
| Revenue growth | 737% | — | — |
Straight from the Form 990 — descriptive, not an evaluation. A ratio is hidden when its base is zero or too small to be meaningful; the dollars are always shown.
Compare
Filings & Schedule Manifest
Want to add your own materials alongside these filings? Claim this org
Sources
Names, privacy, and removal requests More
The names, titles, and compensation shown on this page are reproduced from IRS Form 990 filings, which are public records.
Philanthropy.org does not alter the content of those filings. All information appears exactly as reported by the filing organization for the tax year shown.
We publish only information contained in the public IRS filing — and less than the filing contains. Our profile pages do not display street addresses, telephone numbers, personal email addresses, or other personal contact information, even where the filing includes them.
Many people share the same name. A name shown on this page reflects only what one organization reported in one IRS filing for one tax year. It should not be interpreted as identifying any other individual with the same or a similar name.
If you are no longer affiliated with the organization, your name will generally stop appearing in future IRS filings once the organization no longer reports you. Pages for tax years in which you were reported remain published because those filings remain part of the public record.
Philanthropy.org does not alter or remove IRS filing records. Removing a page from this website would not remove the underlying IRS filing, which remains publicly available from the IRS and other publishers of the same information.
If you believe the IRS filing itself is inaccurate, corrections must be made by the filing organization or the IRS directly.
If you ARE the filing organization, claim this org and add context
Made it to the end? Claim this organization