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US nonprofit · EIN 873420125 · Burlingame, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 873420125) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe time served.Latest return IRS Form 990 series e-file data - 990 for the year to 30 September 2025: assets, liabilities, staff, website, telephone, pay, grants paid (Schedule I).Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue. Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Tideline Foundation

Donations deductible
Revenue
$79k
year to 30 September 2025
Expenses
$428k
year to 30 September 2025
Total assets
$5m
$6k liabilities
Net assets
$5m
assets less liabilities
Directors and trustees
3
4.4 years on average
Staff
2
employees, year to 30 September 2025
Left since last filing
0
no seats appear to have opened
Voting members
3
reported in Part VI
How am I connected?

Tideline Foundation's network

3 peoplei3 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (3). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

3 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 3 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Cindy HoangTreasurer2022
4 yrs
Ronald EpsteinPresident2022
4 yrs
Theresa EpsteinCompany secretary2022
4 yrs
Under 5 years5 to 6 years6 years or more

Pay and hours

year to 30 September 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Ronald EpsteinPresident15$0
Theresa EpsteinSecretary15$0
Cindy HoangTreasurer15$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Tideline Foundation
EIN
873420125
Address
1350 Bayshore Hwy Ste 520, Burlingame, CA, 94010-1814
State
California
Mission
Tideline foundation promotes societal welfare and works to lessen tensions and eliminate prejudice and discrimination by promoting cohesion through building a recognition of the commonality of interest among all citizens through education and communication. (as filed on the Form 990)
Activity (NTEE)
W99 Public and societal benefit
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Public & Societal Benefit
Size band
6 (IRS master file code)
Formed
2021
Principal officer
Ronald Epstein (as named on the Form 990)
IRS ruling date
1 April 2022
Status
Code 01 (unconditional exemption)
Form 990 filings on record
3, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥4years on the filingsCindy Hoang
≥4years on the filingsRonald Epstein
≥4years on the filingsTheresa Epstein

Latest return

year to 30 September 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 30 September 2025. US dollars, as filed.
Total assets
$5m
Total liabilities
$6k
Net assets or fund balances
$5m
Contributions and grants received
$0
Program service revenue
$0
Grants and similar paid out
$262k
Employees
2

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2023$422k$160k$262k

As filed on the IRS Form 990. US dollars.

Grants paid

1 listediFrom Schedule I of the Form 990: grants and assistance to organisations in the United States, largest first (up to 25). Schedule I is filed only by organisations that gave more than $5,000 to any one recipient.
RecipientPurposeAmount
Berkeley Center for American DemocracyResearch projects$262k