IRS Information: Tax-Exempt Status

As a non-profit organization, The Morton Arboretum provides full disclosure tax exemption and IRS information.

2008 IRS Form 990
2009 IRS Form 990
2010 IRS Form 990
IRS Determination Letter

• The date in the upper left corner is June 14, 1999.
• Internal Revenue Code section 509(a)(1) is a subcategory of 501(c)(3).

(Internal Revenue Code sections 509(a)(1) and 170(b)(1)(A)(vi) refer to an
organization that is operated exclusively for charitable purposes and that normally receives a substantial portion of its support from the public.)

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