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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 26-0804449

INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH

Tax-exempt · STILLWATER, OK 74078

Financials

$12K$28K2023$58K$20K2024$18K$11K2025
Revenue Expenses · by fiscal year end
Financials of INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990-EZ$18,476$11,070$7,406$217,250–$217,250
December 31, 2024990-EZ$57,960$20,096$37,864$209,844–$209,844
December 31, 2023990-EZ$11,783$27,675-$15,892$171,980–$171,980
Financial details: 990-EZ for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$1,500
Membership dues
$13,860
Investment income
$3,116

Expenses

Grants and similar amounts paid
$6,314
Compensation of officers, directors and key employees
$0
Professional fees and payments to contractors
$2,000
Other expenses
$2,756
Program services (functional)
$8,690

Balance sheet and other

Total assets, start of year
$209,844
Total assets, end of year
$217,250
Total liabilities, end of year
–
Net assets, end of year
$217,250
Cash, savings and investments
$211,106
Gross receipts
$18,476

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, 2025, highest compensation first.

NameTitleHours / weekCompensation
ROBERT BURNAPTreasurer0$0
JULIAN EATON-RYESecretary0$0
NICHOLAS COXOCEANIA BOARD0$0
JIAN-REN SHENASIA BOARD0$0
DAVID M KRAMERAMERICAS BOARD0$0
THOMAS D SHARKEYAMERICAS BOARD0$0
MICHAEL HIPPLEREurope Board0$0
DIANA KIRILOVSKYEUROPE BOARD0$0
ROBERTA CROCEPresident0$0
PETER ADAMSEUROPE BOARD0$0
TRACY LAWSONEUROPE BOARD0$0
DOUG CAMPBELLAMERICAS BOARD0$0
CARA LUBNERAMERICAS BOARD0$0
SPENCER WHITNEYOCEANIA BOARD0$0
HIDEKI HASHIMOTOASIA BOARD0$0
990-EZ for the year ended December 31, 2024: 15 people
NameTitleHours / weekCompensation
ROBERT BURNAPTreasurer0$0
JULIAN EATON-RYESecretary0$0
NICHOLAS COXOCEANIA BOARD0$0
JIAN-REN SHENASIA BOARD0$0
DAVID M KRAMERAMERICAS BOARD0$0
THOMAS D SHARKEYAMERICAS BOARD0$0
MICHAEL HIPPLEREurope Board0$0
DIANA KIRILOVSKYEUROPE BOARD0$0
ROBERTA CROCEPresident0$0
PETER ADAMSEUROPE BOARD0$0
TRACY LAWSONEUROPE BOARD0$0
DOUG CAMPBELLAMERICAS BOARD0$0
CARA LUBNERAMERICAS BOARD0$0
SPENCER WHITNEYOCEANIA BOARD0$0
HIDEKI HASHIMOTOASIA BOARD0$0
990-EZ for the year ended December 31, 2023: 15 people
NameTitleHours / weekCompensation
ROBERT BURNAPTreasurer0$0
JULIAN EATON-RYESecretary0$0
NICHOLAS COXOCEANIA BOARD0$0
JIAN-REN SHENASIA BOARD0$0
DAVID M KRAMERAMERICAS BOARD0$0
THOMAS D SHARKEYAMERICAS BOARD0$0
MICHAEL HIPPLEREurope Board0$0
DIANA KIRILOVSKYEUROPE BOARD0$0
ROBERTA CROCEPresident0$0
PETER ADAMSEUROPE BOARD0$0
TRACY LAWSONEUROPE BOARD0$0
DOUG CAMPBELLAMERICAS BOARD0$0
CARA LUBNERAMERICAS BOARD0$0
SPENCER WHITNEYOCEANIA BOARD0$0
HIDEKI HASHIMOTOASIA BOARD0$0

Address and contacts

Address (IRS master file)
307 LIFE SCIENCES EAST, STILLWATER, OK 74078-0001
In care of
% JOHN H GOLBECK TREASURER
Signed the 990-EZ
ROBERT BURNAP, Treasurer
Phone
(405) 744-7445
Return prepared by
Aprio Advisory Group LLC

Mission

The tax-exempt purposes of the International Society of Photosynthesis Research are to; 1) encourage the growth and to promote the development of photosynthesis as a pure and applied science, 2) to facilitate publication of research in the science of photosynthesis, 3) to promote international cooperation in photosynthesis research and education, and 4) to sponsor a triennial International Congress on Photosynthesis.

990-EZ for the year ended December 31, 2025

Program accomplishments

  • CONGRESS AND MEETING EXPENSES WITH MEMBERS TO PROMOTE EXCHANGE OF SCIENTIFIC INFORMATION.
    Expenses $6,314 · grants $6,314
  • WEBSITE MAINTENANCE, PUBLICATION EXPENSES, AND EXPENSES RELATED TO MEMBERSHIPS.
    Expenses $2,376

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-EZ on file
2024December 31, 2024May 15, 2025990-EZ on file
2023December 31, 2023May 15, 2024990-EZ on file

File the 2026 990-N for INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH

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

IRS record

EIN
26-0804449
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2007
Accounting year ends
December
Files
Form 990-N (e-Postcard)
Assets (IRS master file)
$217,250
Income (IRS master file)
$18,476

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-EZDecember 2025$18,476$11,070$217,250XML
990-TDecember 2025–––IRS
990-EZDecember 2024$57,960$20,096$209,844IRS
990-TDecember 2024–––IRS
990-EZDecember 2023$11,783$27,675$171,980XML
990-TDecember 2023–––IRS
990-EZDecember 2022–––IRS
990-TDecember 2022–––IRS
990-EZDecember 2021–––IRS
990-TDecember 2021–––IRS
990-EZDecember 2020–––IRS
990-EZDecember 2019–––IRS
990-EZDecember 2018–––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 26-0804449).

Questions about INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH

What is the EIN of INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH?
The employer identification number (EIN) of INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH is 26-0804449.
Is INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2007.
Are donations to INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH 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 INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH last file with the IRS?
The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
Who are the officers and directors of INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH?
The 990-EZ for the year ended December 31, 2025 lists 15 people; 0 received compensation from the organization.
How much revenue does INTERNATIONAL SOCIETY OF PHOTOSYNTHESIS RESEARCH have?
On its 990-EZ for the year ended December 31, 2025 it reported revenue of $18,476, expenses of $11,070 and total assets of $217,250 at year end.

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