Nonprofit · EIN 52-1407343
SINGLE EVENT EFFECTS SYMPOSIUM
Tax-exempt · LOS ANGELES, CA 90009
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-EZ | $136,871 | $150,829 | -$13,958 | $156,798 | $0 | $156,798 |
| December 31, 2024 | 990-EZ | $163,720 | $165,420 | -$1,700 | $170,756 | $0 | $170,756 |
| December 31, 2023 | 990-EZ | $147,821 | $145,864 | $1,957 | $172,456 | $0 | $172,456 |
Financial details: 990-EZ for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $0
- Program service revenue
- $136,870
- Investment income
- $1
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fees and payments to contractors
- $14,338
- Occupancy
- $127,290
- Other expenses
- $9,201
Balance sheet and other
- Total assets, start of year
- $170,756
- Total assets, end of year
- $156,798
- Total liabilities, end of year
- $0
- Net assets, end of year
- $156,798
- Cash, savings and investments
- $156,798
- Gross receipts
- $136,871
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.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Jonathan Pellish | President | 1 | $0 |
| Kenneth LaBel | Coordinator | 2 | $0 |
| Scott Davis | co-Treasurer | 1 | $0 |
| Stephen LaLumondiere | Treasurer | 1 | $0 |
| Steven Moss | Coordinator | 1 | $0 |
990-EZ for the year ended December 31, 2024: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Jonathan Pellish | President | 1 | $0 |
| Kenneth LaBel | Coordinator | 2 | $0 |
| Scott Davis | co-Treasurer | 2 | $0 |
| Stephen LaLumondiere | Treasurer | 1 | $0 |
| Steven Moss | Coordinator | 1 | $0 |
990-EZ for the year ended December 31, 2023: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Jonathan Pellish | President | 1 | $0 |
| Kenneth LaBel | Coordinator | 2 | $0 |
| Scott Davis | co-Treasurer | 2 | $0 |
| Stephen LaLumondiere | Treasurer | 1 | $0 |
| Steven Moss | Coordinator | 1 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 92957 MSC M2, LOS ANGELES, CA 90009-2957
- In care of
- % STEPHEN LALUMONDIERE THE AEROSPAC
- Signed the 990-EZ
- Scott Davis, Treasurer
- Phone
- (310) 336-4404
- Website
- http://www.seemapld.org
California records
California keeps its own records of charities and corporations. Search them by EIN 52-1407343 or by the name SINGLE EVENT EFFECTS SYMPOSIUM.
- Attorney General, Registry of Charities and Fundraisers
- Registration status and filed reports (CT-TR-1, RRF-1)
- Secretary of State, bizfile Online
- Corporation status, entity number, agent for service
- Franchise Tax Board
- Entity status letter (state tax exemption, good standing)
Mission
Operate a scientific meeting.
Program accomplishments
- Organize and run 2023 Single Event Effects/MAPLD Workshop. The symposium is a scientific technical exchange meeting including presentations, panel discussions, poster sessions and a technical exhibit attended by approximately 150 scientists and engineers.
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 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-EZ on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-EZ on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 52-1407343
- 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
- 2000
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Science and technology (U20)
- Assets (IRS master file)
- $156,798
- Income (IRS master file)
- $136,871
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | December 2025 | $136,871 | $150,829 | $156,798 | IRS |
| 990-EZ | December 2024 | $163,720 | $165,420 | $170,756 | IRS |
| 990-EZ | December 2023 | $147,821 | $145,864 | $172,456 | XML |
| 990-EZ | December 2022 | – | – | – | IRS |
| 990-EZ | December 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 52-1407343).
Questions about SINGLE EVENT EFFECTS SYMPOSIUM
- What is the EIN of SINGLE EVENT EFFECTS SYMPOSIUM?
- The employer identification number (EIN) of SINGLE EVENT EFFECTS SYMPOSIUM is 52-1407343.
- Is SINGLE EVENT EFFECTS SYMPOSIUM tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2000.
- Are donations to SINGLE EVENT EFFECTS SYMPOSIUM tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SINGLE EVENT EFFECTS SYMPOSIUM 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 SINGLE EVENT EFFECTS SYMPOSIUM 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 SINGLE EVENT EFFECTS SYMPOSIUM 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 SINGLE EVENT EFFECTS SYMPOSIUM?
- The 990-EZ for the year ended December 31, 2025 lists 5 people; 0 received compensation from the organization.
- How much revenue does SINGLE EVENT EFFECTS SYMPOSIUM have?
- On its 990-EZ for the year ended December 31, 2025 it reported revenue of $136,871, expenses of $150,829 and total assets of $156,798 at year end.
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