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Nonprofit · EIN 84-6044919

CLARKSON CORPORATION

Tax-exempt (reinstated) · DENVER, CO 80203

Address and contacts

Address (IRS master file)
1350 N WASHINGTON ST, DENVER, CO 80203-2008
Mailing address (990-N for 2025)
1350 N WASHINGTON ST, DENVER CO 802032008
Principal officer (990-N for 2025)
Illana Poley, 1350 N Washington, Denver CO 80203

What it must file and when

IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. 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-N on file
2024December 31, 2024May 15, 2025990-N on file
2023December 31, 2023May 15, 2024990-N on file

File the 2026 990-N for CLARKSON CORPORATION

Due May 17, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
84-6044919
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2013
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Human services (P20)

Revocation and reinstatement

Exemption revoked
May 15, 2010
Posted by the IRS
June 9, 2011
Reinstated
Effective May 15, 2010

From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Illana Poley
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Helen Richards
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: HELEN RICHARDS
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Helen Richards
December 31, 2022≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Leigh Grinstead
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Leigh Grinstead
December 31, 2019≤ $50,000 receipts––e-Postcard

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 84-6044919).

Questions about CLARKSON CORPORATION

What is the EIN of CLARKSON CORPORATION?
The employer identification number (EIN) of CLARKSON CORPORATION is 84-6044919.
Is CLARKSON CORPORATION tax-exempt?
Yes. The IRS revoked its exemption on May 15, 2010 and reinstated it effective May 15, 2010.
Are donations to CLARKSON CORPORATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does CLARKSON CORPORATION file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of CLARKSON CORPORATION 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 CLARKSON CORPORATION last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended December 31, 2025.
Who is the principal officer of CLARKSON CORPORATION?
The 990-N for 2025 names Illana Poley.

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