International Union of Operating Engineers Local 399
Chicago, IL 60616 · IRS data through FY2025
Revenue, expenses and net assets
Revenue Expenses Net assets
| Tax year | Revenue | Expenses | Net assets |
|---|---|---|---|
| FY2025 | $89,928,420 | $89,264,571 | $111,441,162 |
| FY2024 | $83,772,543 | $83,059,558 | $106,080,084 |
| FY2023 | $73,700,200 | $74,008,731 | $98,639,361 |
| FY2022 | $69,218,170 | $69,116,059 | $96,943,264 |
| FY2021 | $66,372,442 | $61,450,405 | $101,829,916 |
| FY2020 | $65,700,189 | $62,492,288 | $86,757,470 |
| FY2019 | $61,417,399 | $57,065,994 | $81,489,078 |
| FY2018 | $55,613,612 | $56,637,746 | $76,701,715 |
| FY2017 | $51,123,985 | $49,209,214 | $75,172,814 |
| FY2016 | $46,063,221 | $49,151,157 | $59,984,538 |
| FY2015 | $44,482,693 | $47,719,180 | $65,394,765 |
| FY2014 | $43,233,590 | $40,894,769 | $68,035,841 |
| FY2013 | $40,579,301 | $38,828,251 | $62,535,996 |
| FY2012 | $38,541,442 | $37,128,999 | $55,634,067 |
Form 990 filings
The returns filed by International Union of Operating Engineers Local 399 (EIN 36-6198426), including Form 990 PDFs and e-file data by year, are available in ProPublica's Nonprofit Explorer. The figures on this page come from IRS data files built from those returns.
Where the revenue came from
| Source | Amount | % of revenue |
|---|---|---|
| Contributions & grants | $0 | 0% |
| Program service revenue | $86,521,882 | 96% |
| Other revenue | $3,406,538 | 4% |
What the numbers show
- Program service revenue made up 96% of total revenue in FY2025.
- Net assets covered about 15 months of expenses at the end of the reporting year.
- Total revenue rose from $38,541,442 in FY2012 to $89,928,420 in FY2025. Revenue increased in 13 and decreased in 0 of 13 year-over-year comparisons.
- Expenses exceeded revenue in 4 of 14 reported years (FY2015, FY2016, FY2018, FY2023).
- Net assets grew from $55,634,067 to $111,441,162 between FY2012 and FY2025.
Figures compared against other organizations of the same NTEE program area in the same state. See the methodology page for how these are calculated and the guide to reading nonprofit financials for their limits.
About this organization
TO PROVIDE HEALTH BENEFITS
IRS status
| Ruling year | 1994 |
| Subsection | 501(c)(9) |
Source: Internal Revenue Service — Exempt Organizations Business Master File (downloaded November 4, 2026), Statistics of Income extracts, Form 990 e-file data, Publication 78 and the Automatic Revocation list. Figures are as reported by the organization; IRS processing may adjust them. This is not a charity rating and not tax advice. Confirm deductibility in IRS Tax Exempt Organization Search.
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