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Morton Arboretum

Public charityFed auditsIRS 990
DBA: % MORT
Environment · LISLE, IL · EIN 36-1505770

About

To collect, study, display, and conserve trees and other plants from around the world to inspire learning, foster enjoyment, benefit communities, encourage action, and enhance the environment.

In care of MORT

Donations are tax-deductible
Category
Environment
Employees
561
Volunteers
1,157

Financial Snapshot

FY ending 2024-12-31
Revenue
$57.8M
Expenses
$58.3M
Assets
$367.6M
Liabilities
$57.4M

Financial history

$58.3M$29.1M$0
161718192021222324
RevenueExpenses
Latest FY2024: $57.8M · Avg: $43.2M

Foreign activity (Schedule F)

Total spent abroad$62.2M
Foreign employees0
Foreign offices0
Foreign partnership interestYes
Foreign trust interestNo
RegionActivitySpent
CENTRAL AMERICA AND THE CARIBBEAN
NORTH AMERICA
EUROPE
CENTAL AMERICA AND THE CARIBBEAN
EAST ASIA AND THE PACIFIC
NORTH AMERICA
RUSSIA AND NEIGHBORING STATES
SUB-SAHARAN AFRICA
EUROPE
CENTRAL AMERICA AND THE CARIBBEAN
NORTH AMERICA

501(h) election

This 501(c)(3) has NOT elected 501(h) — lobbying is permitted but limited under the vaguer "no substantial part of activities" test.

Political & Grant Activity

Campaign Spending
Lobbying
$181K
Grants Given
$324K
MORTON ARBORETUM
Your actions

Address

4100 Illinois Route 53
Lisle, IL, 60532-128

Governance

Voting board members22
Independent members22
Conflict-of-interest policyYes
Whistleblower policyYes
Doc-retention policyYes
Audit committeeYes
990 reviewed by boardYes

Compensation practices

Severance paymentsYes
Equity-based compNo
Supplemental retirement planNo
Compensation committeeYes
Used comp surveyYes
Board approved compYes
Initial contract exceptionNo

Financial detail (Schedule D)

Board-designated %68.0%
Permanent endowment %22.0%
Endowment held by related orgNo

Fundraising activity (Schedule G)

Uses professional fundraisersYes
Gross fundraising receipts$279K
Net to org$121K
Retained by contractors$158K
ChannelsMail · Phone · Email · In-person · Grant solicitation
Public records
ProPublica Nonprofit Explorer
Full 990 PDFs going back to 2001, plus parsed financial extracts. The easiest place to read actual filings.
IRS Tax Exempt Organization Search
IRS-side authoritative source. Confirms current exempt status and pulls the latest determination letter.
These open in a new tab. AllCiv doesn't host filings directly — these are the authoritative public-record sources.