What is the EIN of OCEAN MAMMAL INSTITUTE?

The employer identification number (EIN) of OCEAN MAMMAL INSTITUTE is 23-2777757.

Is OCEAN MAMMAL INSTITUTE tax-exempt?

Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1995.

Are donations to OCEAN MAMMAL INSTITUTE tax-deductible?

Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).

When is the next return of OCEAN MAMMAL INSTITUTE 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 OCEAN MAMMAL INSTITUTE 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 OCEAN MAMMAL INSTITUTE?

The 990-N for 2025 names Marsha L Green.

Who are the officers and directors of OCEAN MAMMAL INSTITUTE?

The 990-EZ for the year ended December 31, 2023 lists 5 people; 0 received compensation from the organization.

How much revenue does OCEAN MAMMAL INSTITUTE have?

On its 990-EZ for the year ended December 31, 2023 it reported revenue of $43,364, expenses of $67,053 and total assets of $109,347 at year end.

Nonprofit · EIN 23-2777757

OCEAN MAMMAL INSTITUTE

Tax-exempt · READING, PA 19608

Financials

Revenue Expenses · by fiscal year end

Financials of OCEAN MAMMAL INSTITUTE by year, from its e-filed returns
Year ended	Form	Revenue	Expenses	Net income	Total assets	Liabilities	Net assets
December 31, 2023	990-EZ	$43,364	$67,053	-$23,689	$109,347	$43,328	$66,019

Financial details: 990-EZ for the year ended December 31, 2023

Revenue

Contributions, gifts and grants: $7,000
Program service revenue: $35,209
Net gain from sales of assets: $1,155

Expenses

Compensation of officers, directors and key employees: $0
Professional fees and payments to contractors: $6,605
Printing, publications and postage: $525
Other expenses: $59,923
Program services (functional): $67,053

Balance sheet and other

Total assets, start of year: $94,736
Total assets, end of year: $109,347
Total liabilities, end of year: $43,328
Net assets, end of year: $66,019
Cash, savings and investments: $109,347
Gross receipts: $47,907

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-EZ for the year ended December 31, 2023, highest compensation first.

Name	Title	Hours / week	Compensation
MARSHA GREEN PHD	PRESIDENT	20	$0
CHRISTOPHER ANCONA	SECRETARY/TR	1	$0
ROXANNE GUPTA PHD	BOARD MEMBER	1	$0
JANICE LAPKIEWICZ	BOARD MEMBER	1	$0
SICILY MASCIOTTI	BOARD MEMBER	1	$0

Address and contacts

Address (IRS master file): 714 MOHNS HILL RD, READING, PA 19608-9032
Mailing address (990-N for 2025): 714 Mohns Hill Road, Reading PA 19608
Principal officer (990-N for 2025): Marsha L Green, 714 Mohns Hill Road, Reading PA 19608
Signed the 990-EZ: MARSHA GREEN PHD, PRESIDENT
Phone: (610) 670-7386
Website: WWW.OCEANMAMMALINST.ORG
Return prepared by: ALAN ROSS & COMPANY PC

Mission

RESEARCH ON ACTIVITIES OF WHALES AND HUMAN INTERACTION; EDUCATIONAL SEMINARS ON WHALES AND THEIR HABITAT AND RESEARCH FINDINGS.
990-EZ for the year ended December 31, 2023

Program accomplishments

RESEARCH EXPEDITION/TRIP TO HAWAII WITH COLLEGE STUDENTS PARTICIPATING IN AN INTERNSHIP PROGRAM WITH THE PURPOSE OF INCREASING PUBLIC AWARENESS OF WHALE AND HUMAN INTERACTION.
Expenses $67,053
EDUCATIONAL PROGRAMS, LECTURES, RESEARCH RELATED TO THE PROTECTION OF WHALES INCLUDING THE EFFECTS OF RED TIDE, ENGINE NOISE, SONAR, AND 5G ON HUMPBACK WHALES, AND WHALE VOCALIZATIONS AND SOCIAL COMMUNICATIONS.

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 year	Year ended	Due	IRS public records
2025	December 31, 2025	May 15, 2026	990-N on file
2024	December 31, 2024	May 15, 2025	990-N on file
2023	December 31, 2023	May 15, 2024	990-EZ on file

File the 2026 990-N for OCEAN MAMMAL INSTITUTE

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

IRS record

EIN: 23-2777757
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: 1995
Accounting year ends: December
Files: Form 990-N (e-Postcard)
Category (NTEE): Animal-related (D012)

Filing history

Form	Year ended	Revenue	Expenses	Assets	Return
990-N for 2025 Officer: Marsha L Green	December 31, 2025	≤ $50,000 receipts	–	–	e-Postcard
990-N for 2024 Officer: Marsha Green	December 31, 2024	≤ $50,000 receipts	–	–	e-Postcard
990-EZ	December 2023	$43,364	$67,053	$109,347	XML
990-EZ	December 2022	–	–	–	IRS
990-EZ	December 2021	–	–	–	IRS
990-EZ	December 2020	–	–	–	IRS
990-EZ	December 2018	–	–	–	IRS
990-EZ	December 2017	–	–	–	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 23-2777757).

Questions about OCEAN MAMMAL INSTITUTE

What is the EIN of OCEAN MAMMAL INSTITUTE?: The employer identification number (EIN) of OCEAN MAMMAL INSTITUTE is 23-2777757.
Is OCEAN MAMMAL INSTITUTE tax-exempt?: Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1995.
Are donations to OCEAN MAMMAL INSTITUTE tax-deductible?: Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does OCEAN MAMMAL INSTITUTE file?: Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of OCEAN MAMMAL INSTITUTE 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 OCEAN MAMMAL INSTITUTE 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 OCEAN MAMMAL INSTITUTE?: The 990-N for 2025 names Marsha L Green.
Who are the officers and directors of OCEAN MAMMAL INSTITUTE?: The 990-EZ for the year ended December 31, 2023 lists 5 people; 0 received compensation from the organization.
How much revenue does OCEAN MAMMAL INSTITUTE have?: On its 990-EZ for the year ended December 31, 2023 it reported revenue of $43,364, expenses of $67,053 and total assets of $109,347 at year end.