Nonprofit · EIN 31-0740753
INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT
Tax-exempt · INDIANAPOLIS, IN 46240
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| September 30, 2025 | 990 | $2,064,070 | $1,716,215 | $347,855 | $991,605 | $78,725 | $912,880 |
| September 30, 2024 | 990 | $1,015,359 | $1,107,263 | -$91,904 | $667,929 | $102,904 | $565,025 |
| September 30, 2023 | 990 | $887,875 | $1,182,672 | -$294,797 | $726,486 | $71,126 | $655,360 |
Financial details: 990 for the year ended September 30, 2025
Revenue
- Contributions, gifts and grants
- $0
- Program service revenue
- $2,051,718
- Investment income
- $11,268
- Other revenue
- $1,084
Expenses
- Grants and similar amounts paid
- $11,032
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Accounting fees
- $2,000
- Program services (functional)
- $1,348,956
- Management and general (functional)
- $367,259
Balance sheet and other
- Total assets, start of year
- $667,929
- Total assets, end of year
- $991,605
- Total liabilities, end of year
- $78,725
- Net assets, end of year
- $912,880
- Publicly traded securities
- $187,486
- Net assets without donor restrictions
- $884,981
- Net assets with donor restrictions
- $27,899
- Gross receipts
- $2,064,070
- Employees
- 0
- Volunteers
- 100
- Year formed
- 1958
- State of legal domicile
- OH
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 for the year ended September 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JAMES ANDRE | TREASURER Trustee or director, Officer | 5 | $0 |
| YANA FELDMAN | MEMBER AT LA Trustee or director | 1.5 | $0 |
| MAREK FLASKA | MEMBER AT LA Trustee or director | 1.5 | $0 |
| TINA HERNANDEZ | PRESIDENT Trustee or director, Officer | 6 | $0 |
| TERESSA MCKINNEY | SECRETARY Trustee or director, Officer | 3 | $0 |
| SUSAN PEPPER | IMMIDEIATE P Trustee or director | 1.5 | $0 |
| LAURA ROCKWOOD | VICE PRESIDE Trustee or director, Officer | 5 | $0 |
| AMANADA RYNES | MEMBER AT LA Trustee or director | 1.5 | $0 |
| MARK SCHANFEIN | IMMEDIATE PA Trustee or director | 1.5 | $0 |
| NA YOUNG | MEMBER AT LA Trustee or director | 1.5 | $0 |
| KENT LINDEMAN | EXECUTIVE DI Officer | 1.5 | $0 |
990 for the year ended September 30, 2024: 9 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MARK SCHANFEIN | PRESIDENT Trustee or director, Officer | 6 | $0 |
| TINA HERNANDEZ | VICE PRESIDENT Trustee or director, Officer | 5 | $0 |
| JAMES ANDRE | TREASURER Trustee or director, Officer | 5 | $0 |
| TERESSA MCKINNEY | SECRETARY Trustee or director, Officer | 3 | $0 |
| SUSAN PEPPER | IMMEDIATE PAST PRESIDENT Trustee or director | 1.5 | $0 |
| SUNIL CHIRAYATH | MEMBER AT LARGE Trustee or director | 1.5 | $0 |
| YANA FELDMAN | MEMBER AT LARGE Trustee or director | 1.5 | $0 |
| LAURA ROCKWOOD | MEMBER AT LARGE Trustee or director | 1.5 | $0 |
| AMANDA RYNES | MEMBER AT LARGE Trustee or director | 1.5 | $0 |
990 for the year ended September 30, 2023: 9 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MARK SCHANFEIN | PRESIDENT Trustee or director, Officer | 6 | $0 |
| TINA HERNANDEZ | VICE PRESIDENT Trustee or director, Officer | 5 | $0 |
| JAMES ANDRE | TREASURER Trustee or director, Officer | 5 | $0 |
| TERESSA MCKINNEY | SECRETARY Trustee or director, Officer | 3 | $0 |
| SUSAN PEPPER | IMMEDIATE PAST PRESIDENT Trustee or director | 1.5 | $0 |
| SUNIL CHIRAYATH | MEMBER AT LARGE Trustee or director | 1.5 | $0 |
| CLAUDIO GARIAZZO | MEMBER AT LARGE Trustee or director | 1.5 | $0 |
| LAURA ROCKWOOD | MEMBER AT LARGE Trustee or director | 1.5 | $0 |
| CHANTELL MURPHY | MEMBER AT LARGE Trustee or director | 1.5 | $0 |
Address and contacts
- Address (IRS master file)
- 8365 KEYSTONE XING STE 107, INDIANAPOLIS, IN 46240-2685
- In care of
- % SHERWOOD GROUP
- Principal officer (990 for 2024)
- KENT LINDEMAN, 8365 KEYSTONE CROSSING, INDIANAPOLIS, IN 46240
- Signed the 990
- JAMES ANDRE, TREASURER
- Phone
- (317) 907-0090
- Website
- HTTPS;//WWW.INMM.ORG
- Return prepared by
- BOGDANOFF DAGES AND CO PC
Mission
INMM IS DEDICATED TO THE SAFE, SECURE, AND EFFECTIVE MANAGEMENT AND STEWARDSHIP OF NUCLEAR AND OTHER RADIOACTIVE MATERIALS. WE PROMOTE THE ADVANCEMENT OF SCIENTIFIC KNOWLEDGE AND TECHNOLOGIES, PROFESSIONAL DEVELOPMENT, BEST PRACTICES, AND POLICY DIALOGUE.
Program accomplishments
- THE ANNUAL AND ADDITIONAL MEETINGS PROVIDE ATTENDEES WITH A PROFESSIONAL FORUM FOR THE EXCHANGE OF THE LATEST TECHNICAL INFORMATION IN NUCLEAR MATERIALS MANAGEMENT. THE MEETINGS ADDRESS ALL ASPECTS OF NUCLEAR MATERIAL MANAGEMENT WITH PAPERS AND POSTERS ORGANIZED BY THE INMM TECHNICAL PROGRAM COMMITTEE. ALL ATTENDEES MOSTLY MEMBERS, COMPROMISED BY THE ACADEMICS, CONSULTANTS, GOVERNMENT CONTRACTORS/EMPLOYEES. LICENSEES, NEWS MEDIA, NON- GOVERNMENTAL ORGANIZATIONS, NUCLEAR LABORATORIES, PRIVATE INDUSTRY PROFESSIONALS, PUBLIC OFFICIALS, PUBLICS UTILITIES AND GRADUATE STUDENTS ATTEND THE MULTI-DAY INMM ANNUAL MEETING. THERE ARE TYPICALLY 60 CONCURRENT EDUCATIONAL SESSIONS. PAPERS PRESENTED AT THE ANNUAL MEETING ARE PUBLISHED ONLINE FOR MEMBERS AND MEETING ATTENDEES AND WILL BE AVAILABLE FOR SUBSCRIPTION TO NONMEMBERS IN THE FUTURE.Expenses $1,321,665 · grants $11,032 · revenue $2,022,214
- THE JOURNAL IS PUBLISHED WITH THE PURPOSE OF ADVANCING AND PROMOTING EFFICIENT MANAGEMENT OF NUCLEAR MATERIALS. THE JOURNAL IS PUBLISHED FOUR TIMES A YEAR AND IS DISTRIBUTED TO OVER 1200 MEMBERS AND NON-MEMBERS.Expenses $6,731 · revenue $6,286
- WORKSHOPS PROVIDE PARTICIPANTS WITH UPDATED INFORMATION ON SPECIFIC TOPICAL AREAS OF NUCLEAR MATERIALS MANAGEMENT INCLUDING GOVERNMENT PROGRAMS AND POLICY DEVELOPMENT, THE STATUS OF TECHNOLOGIES AND PROJECTS, LICENSING OF MANAGEMENT FACILITIES AND EQUIPMENT AND THE SPECIAL CONSIDERATIONS RELATED TO THE TECHNICAL PROGRAM AREAS. ATTENDEES ACTIVELY PARTICIPATE IN THE DISCUSSIONS AND INTERFACE WITH EXPERTS AS WELL AS WITH PROGRAM MANAGERS AND POLICY MAKERS. OVER 100 ATTENDEES ATTENDED VARIOUS EDUCATIONAL WORKSHOPS THROUGHOUT THE YEAR. PAPERS PRESENTED AT THE WORKSHOPS ARE PUBLISHED AND AVAILABLE AFTER THE EVENT.Expenses $20,560 · revenue $23,218
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in September, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | September 30, 2026 | February 16, 2027 | Not due yet |
| 2024 | September 30, 2025 | February 17, 2026 | 990 on file |
| 2023 | September 30, 2024 | February 18, 2025 | 990 on file |
IRS record
- EIN
- 31-0740753
- Tax-exempt status
- 501(c)(6): Business league or chamber of commerce
- Donations deductible
- No
- Exempt since
- 1969
- Accounting year ends
- September
- Files
- Form 990 or 990-EZ
- Assets (IRS master file)
- $991,605
- Income (IRS master file)
- $2,064,070
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | September 2025 | $2,064,070 | $1,716,215 | $991,605 | XML |
| 990 | September 2024 | $1,015,359 | $1,107,263 | $667,929 | XML |
| 990 | September 2023 | $887,875 | $1,182,672 | $726,486 | XML |
| 990 | September 2022 | $421,515 | $518,944 | $1,032,567 | IRS |
| 990 | September 2021 | – | – | – | 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 31-0740753).
Questions about INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT
- What is the EIN of INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT?
- The employer identification number (EIN) of INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT is 31-0740753.
- Is INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 1969.
- Are donations to INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT due?
- The return for tax year 2025 (the year ending September 30, 2026) is due February 16, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended September 2025.
- Who is the principal officer of INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT?
- The 990 for the year ended September 30, 2025 names KENT LINDEMAN.
- Who are the officers and directors of INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT?
- The 990 for the year ended September 30, 2025 lists 11 people; 0 received compensation from the organization.
- How much revenue does INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT have?
- On its 990 for the year ended September 30, 2025 it reported revenue of $2,064,070, expenses of $1,716,215 and total assets of $991,605 at year end.
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