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Proof School

Public charity
DBA: % ZACHARY SIFUENTES
Other · SAN FRANCISCO, CA · EIN 46-3770194

About

Proof school offers a transformative liberal arts education to young people with an active curiosity and a passion for mathematics, equipping them to reason, communicate, and positively impact their world.

In care of Zachary Sifuentes

Donations are tax-deductible
Category
Other
Employees
28
Volunteers
10

Financial Snapshot

FY ending 2023-06-30
Revenue
$6.5M
Expenses
$5.8M
Assets
$10.1M
Liabilities
$4.9M

Financial history

$6.5M$3.3M$0
1617181920212223
RevenueExpenses
Latest FY2023: $6.5M · Avg: $4.7M

Political & Grant Activity

Campaign Spending
—
Lobbying
—
Grants Given
$1.1M
PROOF SCHOOL
Your actions

Address

221 Main ST Suite 104
SAN Francisco, CA, 94105-190

Governance

Voting board members10
Independent members9
Conflict-of-interest policyYes
Whistleblower policyYes
Doc-retention policyYes
990 reviewed by boardYes

Compensation practices

Severance paymentsNo
Equity-based compNo
Supplemental retirement planNo
Used comp surveyYes
Board approved compYes
Initial contract exceptionNo
Public records
ProPublica Nonprofit Explorer ↗
Full 990 PDFs going back to 2001, plus parsed financial extracts. The easiest place to read actual filings.
IRS Tax Exempt Organization Search ↗
IRS-side authoritative source. Confirms current exempt status and pulls the latest determination letter.
These open in a new tab. AllCiv doesn't host filings directly — these are the authoritative public-record sources.