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Nonprofit · EIN 51-0223079

SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC

Tax-exempt · RAPID CITY, SD 57702

Financials

$121K$80K2023$6$4K2024$582$1K2025
Revenue Expenses · by fiscal year end
Financials of SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990-PF$582$1,488-$906$54,501$0$54,501
December 31, 2024990-PF$6$4,286-$4,280$55,407$0$55,407
December 31, 2023990-PF$120,650$79,821$40,829$59,687$0$59,687
Financial details: 990-PF for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$576
Interest
$6

Expenses

Grants and similar amounts paid
$682
Compensation of officers, directors and key employees
$0
Salaries, compensation and benefits (total)
$0
Disbursements for charitable purposes
$838

Balance sheet and other

Total assets, start of year
$55,407
Total assets, end of year
$54,501
Total liabilities, end of year
$0
Net assets, end of year
$54,501
Fair market value of assets
$54,501
Qualifying distributions
$838

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
Sarah Keenan
7911 Okpealuk Street, Rapid City, SD 57702
Treasurer5$0
Chris Omelon
Mackintosh Corry Hall, Room E109, Kingston, Ontario K7L 3N6, CA
President5$0
990-PF for the year ended December 31, 2024: 2 people
NameTitleHours / weekCompensation
Sarah Keenan
7911 Okpealuk Street, Rapid City, SD 57702
Treasurer5$0
Chris Omelon
Mackintosh Corry Hall, Room E109, Kingston, Ontario K7L 3N6, CA
President5$0
990-PF for the year ended December 31, 2023: 2 people
NameTitleHours / weekCompensation
Sarah Keenan
7911 Okpealuk Street, Rapid City, SD 57702
Treasurer5$0
Annette Engel
713 Strong Hall, 1612 Cumberland Avenue, Knoxville, TN 37996
President5$0

Address and contacts

Address (IRS master file)
7911 OKPEALUK ST, RAPID CITY, SD 57702-8943
In care of
% SARAH KEENAN
Signed the 990-PF
Sarah Keenan, Treasurer
Phone
(605) 394-5163

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, 2024990-PF on file

IRS record

EIN
51-0223079
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
1978
Accounting year ends
December
Files
Form 990-PF
Assets (IRS master file)
$54,501
Income (IRS master file)
$582

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFDecember 2025$582$1,488$54,501IRS
990-PFDecember 2024$6$4,286$55,407IRS
990-PFDecember 2023$120,650$79,821$59,687XML
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 51-0223079).

Questions about SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC

What is the EIN of SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC?
The employer identification number (EIN) of SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC is 51-0223079.
Is SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1978.
Are donations to SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
Which annual return does SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC file?
Form 990-PF. Private foundations file every year.
When is the next return of SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC 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 SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC 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 SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC?
The 990-PF for the year ended December 31, 2025 lists 2 people; 0 received compensation from the organization.
How much revenue does SYMPOSIA ON ENVIRONMENTAL BIOGEOCHEMISTRY INC have?
On its 990-PF for the year ended December 31, 2025 it reported revenue of $582, expenses of $1,488 and total assets of $54,501 at year end.

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