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Nonprofit · EIN 46-3323147

MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA

Tax-exempt (reinstated) · NAPA, CA 94558

Address and contacts

Address (IRS master file)
1003 PALOMINO WAY, NAPA, CA 94558-4007
Mailing address (990-N for 2024)
1003 Palomino Way, Napa CA 94558
Principal officer (990-N for 2024)
Malcolm De Sieyes, 1003 Palomino Way, Napa CA 94558

California records

California keeps its own records of charities and corporations. Search them by EIN 46-3323147 or by the name MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA.

Attorney General, Registry of Charities and Fundraisers
Registration status and filed reports (CT-TR-1, RRF-1)

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, 2026Not on file
2024December 31, 2024May 15, 2025990-N on file
2023December 31, 2023May 15, 2024Check at the IRS

File the 2025 990-N for MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA

Due May 15, 2026 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
46-3323147
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
2023
Accounting year ends
December
Files
Form 990-N (e-Postcard)

Revocation and reinstatement

Exemption revoked
May 15, 2022
Posted by the IRS
August 8, 2022
Reinstated
Effective May 15, 2022

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 2024
Officer: Malcolm De Sieyes
December 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: MALCOLM DE SIEYES
December 31, 2018≤ $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 46-3323147).

Questions about MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA

What is the EIN of MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA?
The employer identification number (EIN) of MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA is 46-3323147.
Is MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA tax-exempt?
Yes. The IRS revoked its exemption on May 15, 2022 and reinstated it effective May 15, 2022.
Are donations to MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA 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 MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA last file with the IRS?
The latest return in the IRS public files is the 990-N for 2024 for the year ended December 31, 2024.
Who is the principal officer of MARINE MAMMAL RESEARCH INSTITUTE OF CALIFORNIA?
The 990-N for 2024 names Malcolm De Sieyes.

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