Data update history
February 7, 2025
Posted financials
Added Form 990 for fiscal year 2023
January 18, 2025
Updated personnel
Identified 3 new personnel
October 14, 2024
Updated personnel
Identified 1 new personnel
January 3, 2024
Posted financials
Added Form 990 for fiscal year 2022
January 3, 2024
Updated personnel
Identified 11 new personnel
Nonprofit Types
Fraternal societiesMutual assistance organizationsBusiness and community development organizationsCommunity service nonprofitsChapter / child organizationsCharities
Issues
Community improvementBusiness and industry
Characteristics
MembershipsState / local levelCommunity engagement / volunteeringTax deductible donations
General information
- Address
- 275 Sunset Dr
- Dousman, WI 53118
- Metro area
- Milwaukee-Waukesha, WI
- County
- Waukesha County, WI
- Website URL
- wimasons.org/Â
- Phone
- (262) 965-2200
IRS details
- EIN
- 39-0129695
- Fiscal year end
- December
- Taxreturn type
- Form 990
- Year formed
- 1843
- Eligible to receive tax-deductible contributions (Pub 78)
- Yes
Categorization
- NTEE code, primary
- Y40: Fraternal Beneficiary Societies and Voluntary Employees Associations
- NAICS code, primary
- 813920: Professional Associations
- Parent/child status
- Parent of group exemption
- Subordinate organization
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