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Nonprofit · EIN 20-5872138

DIAMOND RESEARCH FOUNDATION

Tax-exempt (reinstated) · SUPERIOR, CO 80027

Address and contacts

Address (IRS master file)
300 CENTER DR STE G PMB 248, SUPERIOR, CO 80027-8633
In care of
% BETH ROSENSHEIN
Mailing address (990-N for 2025)
300 Center Drive Suite G-248, Superior CO 80027
Principal officer (990-N for 2025)
Leon Rosenshein, 434 Orchard Way, Louisville CO 80027

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 DIAMOND RESEARCH FOUNDATION

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

IRS record

EIN
20-5872138
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
2018
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Category (NTEE)
Medical research (H99)

Revocation and reinstatement

Exemption revoked
May 15, 2017
Posted by the IRS
August 16, 2017
Reinstated
Effective May 15, 2017

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: Leon Rosenshein
December 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Leon Rosenshein
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Leon Rosenshein
December 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2021
Officer: Leon Rosenshein
December 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Leon Rosenshein
December 31, 2020≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Leon Rosenshein
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 20-5872138).

Questions about DIAMOND RESEARCH FOUNDATION

What is the EIN of DIAMOND RESEARCH FOUNDATION?
The employer identification number (EIN) of DIAMOND RESEARCH FOUNDATION is 20-5872138.
Is DIAMOND RESEARCH FOUNDATION tax-exempt?
Yes. The IRS revoked its exemption on May 15, 2017 and reinstated it effective May 15, 2017.
Are donations to DIAMOND RESEARCH FOUNDATION tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does DIAMOND RESEARCH FOUNDATION file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of DIAMOND RESEARCH 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 DIAMOND RESEARCH FOUNDATION 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 DIAMOND RESEARCH FOUNDATION?
The 990-N for 2025 names Leon Rosenshein.

Other nonprofits in SUPERIOR

All nonprofits in SUPERIOR · Colorado · Medical research