Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 13-6086299

GUSTAVUS & LOUISE PFEIFFER

Tax-exempt · WILMINGTON, DE 19809

Financials

$934K$188K2023$1.6M$849K2024
Revenue Expenses · by fiscal year end
Financials of GUSTAVUS & LOUISE PFEIFFER by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2024990-PF$1,647,953$849,467$798,486$19,610,601$121,148$19,489,453
December 31, 2023990-PF$933,643$188,163$745,480$17,863,505$96,868$17,766,637
Financial details: 990-PF for the year ended December 31, 2024

Revenue

Contributions, gifts and grants
$0
Dividends
$417,414
Interest
$21,974
Net gain from sales of assets
$1,208,565

Expenses

Grants and similar amounts paid
$651,000
Compensation of officers, directors and key employees
$34,000
Disbursements for charitable purposes
$801,537
Excise tax on investment income
$23,000

Balance sheet and other

Total assets, start of year
$17,863,505
Total assets, end of year
$19,610,601
Total liabilities, end of year
$121,148
Net assets, end of year
$19,489,453
Fair market value of assets
$19,610,601
Qualifying distributions
$801,537
Net investment income
$1,662,649

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, 2024, highest compensation first.

NameTitleHours / weekCompensation
Lise P Chapman
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Pres1$7,200
Patricia R Herold
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, AS Sec, AS TREAS1$7,200
Matthew Mayro Keeney
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, VP1$7,200
Sarah SP McCarthy
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Sec, Treas1$7,200
Kimberly Herold Alvarez
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$5,200
990-PF for the year ended December 31, 2023: 6 people
NameTitleHours / weekCompensation
Lise P Chapman
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Pres1$7,200
Patricia R Herold
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, AS Sec, As Trea1$7,200
Matthew Mayro Keeney
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, VP1$7,200
Sarah SP McCarthy
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Sec, Treas1$7,200
Kimberly Herold Alvarez
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir1$6,800
H Robert Herold II
Foundation Source 501 Silverside Rd, Wilmington, DE 198091377
Dir, Honorary Chair1$3,200

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
Sarah SP McCarthy, Secretary
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, 2026Not on file
2024December 31, 2024May 15, 2025990-PF on file
2023December 31, 2023May 15, 2024990-PF on file

IRS record

EIN
13-6086299
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
1952
Accounting year ends
December
Files
Form 990-PF
Assets (IRS master file)
$19,610,601
Income (IRS master file)
$1,679,117

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFDecember 2024$1,647,953$849,467$19,610,601XML
990-PFDecember 2023$933,643$188,163$17,863,505XML
990-PFDecember 2022–––IRS
990-PFDecember 2021–––IRS
990-PFDecember 2020–––IRS

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 13-6086299).

Questions about GUSTAVUS & LOUISE PFEIFFER

What is the EIN of GUSTAVUS & LOUISE PFEIFFER?
The employer identification number (EIN) of GUSTAVUS & LOUISE PFEIFFER is 13-6086299.
Is GUSTAVUS & LOUISE PFEIFFER tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1952.
Are donations to GUSTAVUS & LOUISE PFEIFFER tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does GUSTAVUS & LOUISE PFEIFFER file?
Form 990-PF. Private foundations file every year.
When is the next return of GUSTAVUS & LOUISE PFEIFFER due?
The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did GUSTAVUS & LOUISE PFEIFFER last file with the IRS?
The latest return in the IRS public files is the 990-PF for the year ended December 2024.
Who are the officers and directors of GUSTAVUS & LOUISE PFEIFFER?
The 990-PF for the year ended December 31, 2024 lists 5 people; 5 received compensation from the organization, the highest $7,200 (Lise P Chapman, Dir, Pres).
How much revenue does GUSTAVUS & LOUISE PFEIFFER have?
On its 990-PF for the year ended December 31, 2024 it reported revenue of $1,647,953, expenses of $849,467 and total assets of $19,610,601 at year end.

Other nonprofits in WILMINGTON

All nonprofits in WILMINGTON · Delaware