The Morton Arboretum: Single Audit Reports and Findings
The Morton Arboretum filed 9 single audits between 2017 and 2025; the most recently observed auditor is CROWE LLP (2025), and the 2025 report lists 0 findings. Data as of 2026-11-06.
Data as of Nov 6, 2026 · Source: Federal Audit Clearinghouse (public data)
Single audits by year
One row per audit year as the Federal Audit Clearinghouse accepted it. The auditor named is the one observed on that filing; The Morton Arboretum is recorded in LISLE, Illinois under EIN 361505770, and the Clearinghouse records it as a nonprofit. Each report opens on the Clearinghouse itself; how to search the Federal Audit Clearinghouse explains the rest of the reporting package.
| Audit year | Fiscal year end | Federal expended | Threshold applied | Auditor observed | Findings | MW / SD | FAC report |
|---|---|---|---|---|---|---|---|
| 2025 | 2025-12-31 | $6,878,375 | $1,000,000 | CROWE LLP | 0 | — | 2025-12-GSAFAC-0000416948 |
| 2024 | 2024-12-31 | $4,013,944 | $750,000 | PLANTE & MORAN, PLLC | 0 | — | 2024-12-GSAFAC-0000360813 |
| 2023 | 2023-12-31 | $2,402,084 | $750,000 | PLANTE & MORAN, PLLC | 0 | — | 2023-12-GSAFAC-0000040685 |
| 2022 | 2022-12-31 | $2,796,669 | $750,000 | PLANTE & MORAN, PLLC | 0 | — | 2022-12-CENSUS-0000213318 |
| 2021 | 2021-12-31 | $1,452,532 | $750,000 | PLANTE & MORAN, PLLC | 0 | — | 2021-12-CENSUS-0000213318 |
| 2020 | 2020-12-31 | $1,474,271 | $750,000 | PLANTE & MORAN, PLLC | 0 | — | 2020-12-CENSUS-0000213318 |
| 2019 | 2019-12-31 | $1,166,133 | $750,000 | PLANTE & MORAN, PLLC | 0 | — | 2019-12-CENSUS-0000213318 |
| 2018 | 2018-12-31 | $1,354,032 | $750,000 | PLANTE & MORAN, PLLC | 0 | — | 2018-12-CENSUS-0000213318 |
| 2017 | 2017-12-31 | $1,101,469 | $750,000 | PLANTE & MORAN, PLLC | 1 | SD | 2017-12-CENSUS-0000213318 |
When is the next single audit due?
If The Morton Arboretum is again required to have a single audit for the fiscal year ending Dec 31, 2026, the reporting package is due to the Federal Audit Clearinghouse by Sep 30, 2027 at the latest.
Whether an audit is required depends on federal awards expended in that year (the single audit threshold). The rule, 2 CFR 200.512(a): the reporting package is due within 30 calendar days after the auditee receives the auditor's report or nine months after the end of the audit period, whichever is earlier; the date above is the nine-month date, moved to Monday when it falls on a weekend. Last verified: 2026-11-15.
Which federal programs did this organization report?
From the most recent accepted report, as listed on its schedule of expenditures of federal awards (SEFA). "Major" is the designation the auditor made under 2 CFR 200.518, not ours.
| ALN | Program | Expended | Major |
|---|---|---|---|
| 10.727 | INFLATION REDUCTION ACT URBAN & COMMUNITY FORESTRY PROGRAM | $2,138,966 | Yes |
| 10.727 | INFLATION REDUCTION ACT URBAN & COMMUNITY FORESTRY PROGRAM | $1,221,532 | Yes |
| 10.723 | COMMUNITY PROJECT FUNDS - CONGRESSIONALLY DIRECTED SPENDING | $438,935 | No |
| 10.675 | URBAN AND COMMUNITY FORESTRY PROGRAM | $285,184 | No |
| 10.675 | URBAN AND COMMUNITY FORESTRY PROGRAM | $249,513 | No |
| 45.312 | NATIONAL LEADERSHIP GRANTS | $232,553 | No |
| 47.074 | BIOLOGICAL SCIENCES | $224,347 | No |
| 11.431 | CLIMATE AND ATMOSPHERIC RESEARCH | $206,127 | No |
| 10.675 | URBAN AND COMMUNITY FORESTRY PROGRAM | $181,089 | No |
| 81.049 | OFFICE OF SCIENCE FINANCIAL ASSISTANCE PROGRAM | $167,642 | No |
| 47.074 | BIOLOGICAL SCIENCES | $163,745 | No |
| 45.301 | MUSEUMS FOR AMERICA | $134,040 | No |
| 10.675 | URBAN AND COMMUNITY FORESTRY PROGRAM | $123,127 | No |
| 10.664 | COOPERATIVE FORESTRY ASSISTANCE | $114,015 | No |
| 47.074 | BIOLOGICAL SCIENCES | $110,197 | No |
| 45.301 | MUSEUMS FOR AMERICA | $99,065 | No |
| 10.652 | FORESTRY RESEARCH | $84,795 | No |
| 10.664 | COOPERATIVE FORESTRY ASSISTANCE | $81,584 | No |
| 10.680 | FOREST HEALTH PROTECTION | $77,491 | No |
| 10.680 | FOREST HEALTH PROTECTION | $75,853 | No |
| 10.025 | Plant and Animal Disease, Pest Control, and Animal Care | $64,638 | No |
| 45.312 | NATIONAL LEADERSHIP GRANTS | $60,106 | No |
| 47.074 | BIOLOGICAL SCIENCES | $55,755 | No |
| 10.664 | COOPERATIVE FORESTRY ASSISTANCE | $47,024 | No |
| 10.680 | FOREST HEALTH PROTECTION | $44,083 | No |
What findings did the auditor report?
The reference is the auditor’s; the requirement is the Compliance Supplement category the auditor selected. The finding text itself is not reproduced here; the FAC report linked above carries it in full. What the two severity levels mean: material weakness vs significant deficiency.
The most recent report lists no finding.
Form 990 and IRS registration
Form 990 "accounting fees" (Part IX line 11c) cover all accounting services reported by the organization and are not the price of an audit engagement.
Where to find the return itself, and what our Form 990 data covers: Form 990 lookup.
- Most recent return
- 990 for 2024-12
- Total revenue
- $57,793,716
- Total assets
- $367,601,821
- Accounting fees (Part IX line 11c)
- $923,779
- Paid preparer
- PLANTE & MORAN PLLC
- IRS object id
- 202523089349302557
- NTEE code
- C410
- Exempt under
- 501(c)(3)
- Ruling year
- 1925
- BMF release
- 2026-10-20
Read next
- CPA firms that audit Illinois nonprofits
- Illinois single audit statistics
- Illinois nonprofit audit requirements
How we computed this
Every row comes from the Federal Audit Clearinghouse record named beside it, one report per audit year, with a resubmission superseding the filing it replaces. The auditor is the one named on that filing — it is not a statement about who audits The Morton Arboretum now. Form 990 figures come from the IRS e-filed return named by its object id. This page exists because the organization filed at least two single audits, or one with a finding.
Cite this page
AuditRadar. “The Morton Arboretum, Illinois Single Audits 2017–2025.” https://getauditradar.com/single-audits/il/the-morton-arboretum-361505770/. Data as of 2026-11-06.