Data update history
May 22, 2024
Updated personnel
Identified 2 new personnel
May 1, 2024
Used new vendors
Identified 1 new vendor, including
January 25, 2024
Updated personnel
Identified 3 new personnel
November 25, 2023
Posted financials
Added Form 990 for fiscal year 2021
June 19, 2023
Posted financials
Added Form 990 for fiscal year 2022
Nonprofit Types
Trade associationsBusiness and community development organizationsHeadquarter / parent organizations
Issues
Business and industry
Characteristics
MembershipsCommunity engagement / volunteering
General information
- Address
- 1330 Braddock Pl Suite 501
- Alexandria, VA 22314
- Metro area
- Washington-Arlington-Alexandria, DC-VA-MD-WV
- County
- Alexandria city, VA
- Website URL
- sigma.org/
- Phone
- (703) 709-7000
IRS details
- EIN
- 72-0562589
- Fiscal year end
- September
- Taxreturn type
- Form 990
- Year formed
- 1958
- Eligible to receive tax-deductible contributions (Pub 78)
- No
Categorization
- NTEE code, primary
- S41: Promotion of Business
- NAICS code, primary
- 813910: Trade Associations
- Parent/child status
- Central organization
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