Data update history
June 17, 2023
Updated personnel
Identified 3 new personnel
June 13, 2023
Used new vendors
Identified 2 new vendors, including , and
May 14, 2023
Updated personnel
Identified 3 new personnel
May 10, 2023
Used new vendors
Identified 1 new vendor, including
October 8, 2022
Updated personnel
Identified 2 new personnel
Nonprofit Types
Trade associationsBusiness and community development organizationsHeadquarter / parent organizations
Issues
Business and industry
Characteristics
MembershipsPolitical advocacyCommunity 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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