Tax-exempt organization ยท Files a Form 5500
WIKIMEDIA FOUNDATION ORG
Also filed as WIKIMEDIA FOUNDATION
1 SANSOME ST STE 1895, SAN FRANCISCO, CA 94104-4432
EIN
20-0049703
Tax-exempt status
501(c)(3) charitable, religious, educational
IRS · 2026-09
Deductibility
Contributions are deductible
IRS · 2026-09
Foundation classification
Publicly supported charity (170(b)(1)(A)(vi))
IRS · 2026-09
IRS ruling date
2005-03
IRS · 2026-09
NTEE code
B60
IRS · 2026-09
Latest tax period on file
2025-06
IRS · 2026-09
Revenue (latest 990)
$205,389,744
IRS · 2026-09
Assets (latest 990)
$310,794,417
IRS · 2026-09
Benefit plan 1, 2024 filing
WIKIMEDIA FOUNDATION, INC. 401(K) PLAN
DOL · 2025-10-10
Participants (start of year)
474
DOL · 2025-10-10
Plan features
code 2E2F2G2J2K2T3F3D
DOL · 2025-10-10
Plan type
Single-employer plan
DOL · 2025-10-10
Business code (NAICS)
519100
DOL · 2025-10-10
Benefit plan 502, 2024 filing
WIKIMEDIA FOUNDATION WELFARE BENEFITS PLAN
DOL · 2025-07-15