Tax-exempt organization ยท Files a Form 5500
LAKESIDE SCHOOL
14050 1ST AVE NE, SEATTLE, WA 98125-3025
EIN
91-0564971
Tax-exempt status
501(c)(3) charitable, religious, educational
IRS · 2026-09
Deductibility
Contributions are deductible
IRS · 2026-09
Foundation classification
School
IRS · 2026-09
IRS ruling date
1952-01
IRS · 2026-09
NTEE code
B200
IRS · 2026-09
Latest tax period on file
2025-06
IRS · 2026-09
Revenue (latest 990)
$125,339,252
IRS · 2026-09
Assets (latest 990)
$590,461,413
IRS · 2026-09
Benefit plan 1, 2024 filing
LAKESIDE SCHOOL DEFINED CONTRIBUTION RETIREMENT PLAN
DOL · 2025-09-12
Participants (start of year)
598
DOL · 2025-09-12
Plan features
code 2G2L2M2T
DOL · 2025-09-12
Plan type
Single-employer plan
DOL · 2025-09-12
Business code (NAICS)
611000
DOL · 2025-09-12
Benefit plan 503, 2024 filing
LAKESIDE SCHOOL HEALTH AND WELFARE PLAN
DOL · 2025-07-22