The Morton Arboretum has received $20 million across 381 grants from 133 funders over IRS Form 990 filings (2019–2025). Its largest funder is Hamill Family Foundation.
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Hamill Family Foundation has given $3.4M across 9 grants to The Morton Arboretum.
G Carl Ball Family Foundation has given $3.0M across 11 grants to The Morton Arboretum.
Fidelity Investments Charitable Gift Fund has given $2.5M across 7 grants to The Morton Arboretum.
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