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Nonprofit · EIN 99-3700997

MARIN SENIOR LIFE FOUNDATION

Tax-exempt · WILMINGTON, DE 19809

Financials

$10M$10M2024$19.6M$129K2025
Revenue Expenses · by fiscal year end
Financials of MARIN SENIOR LIFE FOUNDATION by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990-PF$19,628,789$129,361$19,499,428$19,510,570$0$19,510,570
December 31, 2024990-PF$10,025,014$10,013,872$11,142$11,142$0$11,142
Financial details: 990-PF for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$19,010,000
Dividends
$26,473
Interest
$583,854
Net gain from sales of assets
$8,462

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$0
Disbursements for charitable purposes
$111,157
Excise tax on investment income
$8,464

Balance sheet and other

Total assets, start of year
$11,142
Total assets, end of year
$19,510,570
Total liabilities, end of year
$0
Net assets, end of year
$19,510,570
Fair market value of assets
$19,570,895
Qualifying distributions
$111,157
Net investment income
$618,789

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990-PF for the year ended December 31, 2025, highest compensation first.

NameTitleHours / weekCompensation
Luke Barnesmoore
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
Heather Bennett
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Sec1$0
Daniel Cooperman
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
Jennifer Harris-Marks
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
Donna Isralsky
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Pres1$0
Martin Konopken
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
Rebecca Lien
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
Ken Mercer
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, VP, Treas1$0
Joyce Rifkind
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
990-PF for the year ended December 31, 2024: 7 people
NameTitleHours / weekCompensation
Heather Bennett
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Sec1$0
Jennifer Harris-Marks
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
Donna Isralsky
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Pres1$0
Martin Konopken
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
Rebecca Lien
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0
Ken Mercer
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, VP, Treas1$0
Joyce Rifkind
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$0

Address and contacts

Address (IRS master file)
FOUNDATION SOURCE 501 SILVERSIDE RD, WILMINGTON, DE 19809-0000
In care of
% FOUNDATION SOURCE
Signed the 990-PF
Donna Isralsky, President
Phone
(800) 839-1754
Return prepared by
Foundation Source

What it must file and when

IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990-PF on file
2024December 31, 2024May 15, 2025990-PF on file
2023December 31, 2023May 15, 2024Check at the IRS

IRS record

EIN
99-3700997
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Private non-operating foundation
Donations deductible (Pub 78)
Private foundation, 30% limit
Exempt since
2025
Accounting year ends
December
Files
Form 990-PF
Assets (IRS master file)
$19,510,570
Income (IRS master file)
$19,721,375

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFDecember 2025$19,628,789$129,361$19,510,570IRS
990-PFDecember 2024$10,025,014$10,013,872$11,142XML

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 99-3700997).

Questions about MARIN SENIOR LIFE FOUNDATION

What is the EIN of MARIN SENIOR LIFE FOUNDATION?
The employer identification number (EIN) of MARIN SENIOR LIFE FOUNDATION is 99-3700997.
Is MARIN SENIOR LIFE FOUNDATION tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2025.
Are donations to MARIN SENIOR LIFE FOUNDATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does MARIN SENIOR LIFE FOUNDATION file?
Form 990-PF. Private foundations file every year.
When is the next return of MARIN SENIOR LIFE FOUNDATION due?
The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MARIN SENIOR LIFE FOUNDATION last file with the IRS?
The latest return in the IRS public files is the 990-PF for the year ended December 2025.
Who are the officers and directors of MARIN SENIOR LIFE FOUNDATION?
The 990-PF for the year ended December 31, 2025 lists 9 people; 0 received compensation from the organization.
How much revenue does MARIN SENIOR LIFE FOUNDATION have?
On its 990-PF for the year ended December 31, 2025 it reported revenue of $19,628,789, expenses of $129,361 and total assets of $19,510,570 at year end.

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