Nonprofit · EIN 27-0578778
INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES
Tax-exempt · LA CANADA, CA 91011
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $131,333 | $51,440 | $79,893 | $1,064,570 | $0 | $1,064,570 |
| December 31, 2024 | 990 | $286,453 | $85,560 | $200,893 | $984,677 | $0 | $984,677 |
| December 31, 2023 | 990 | $24,990 | $114,397 | -$89,407 | $783,784 | $0 | $783,784 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $0
- Program service revenue
- $53,758
- Investment income
- $77,575
- Net gain from sales of assets
- $47,215
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Accounting fees
- $5,255
- Program services (functional)
- $48,713
- Management and general (functional)
- $2,727
Balance sheet and other
- Total assets, start of year
- $984,677
- Total assets, end of year
- $1,064,570
- Total liabilities, end of year
- $0
- Net assets, end of year
- $1,064,570
- Publicly traded securities
- $1,025,196
- Net assets without donor restrictions
- $1,064,570
- Gross receipts
- $168,149
- Employees
- 0
- Volunteers
- 0
- Year formed
- 2009
- State of legal domicile
- CA
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 December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ENRIQUE CASTRO-CAMUS | DIRECTOR Trustee or director | 1 | $0 |
| MARTINA HAVENITH | DIRECTOR Trustee or director | 1 | $0 |
| FRANK HEGMANN | DIRECTOR Trustee or director | 1 | $0 |
| PETER UHD JEPSEN | DIRECTOR Trustee or director | 1 | $0 |
| DAVID COOKE | DIRECTOR Trustee or director | 1 | $0 |
| JEAN-FRANCOIS LAMPIN | DIRECTOR Trustee or director | 1 | $0 |
| JOHN JELONNEK | DIRECTOR Trustee or director | 1 | $0 |
| NURIA LLOMBART-JUAN | DIRECTOR Trustee or director | 1 | $0 |
| WEI LU | DIRECTOR Trustee or director | 1 | $0 |
| EMMA MACPHERSON | DIRECTOR Trustee or director | 1 | $0 |
| DANIEL MITTLEMAN | DIRECTOR Trustee or director | 1 | $0 |
| GREGORY DENISOV | DIRECTOR Trustee or director | 1 | $0 |
| TAIICHI OTSUJI | DIRECTOR Trustee or director | 1 | $0 |
| GUN-SIK PARK | DIRECTOR Trustee or director | 1 | $0 |
| ALEXANDER SHKURINOV | DIRECTOR Trustee or director | 1 | $0 |
25 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JAN STAKE | DIRECTOR Trustee or director | 1 | $0 |
| MASAHIKO TANI | DIRECTOR Trustee or director | 1 | $0 |
| MIRIAM SERENA VITIELLO | DIRECTOR Trustee or director | 1 | $0 |
| JEROME TIGNON | DIRECTOR Trustee or director | 1 | $0 |
| XI-CHENG ZHANG | DIRECTOR Trustee or director | 1 | $0 |
| AXEL ZEITLER | DIRECTOR Trustee or director | 1 | $0 |
| GIAN PIERO GALLERANO | DIRECTOR Trustee or director | 1 | $0 |
| YIMING ZHU | DIRECTOR Trustee or director | 1 | $0 |
| VINCENT WALLACE | DIRECTOR Trustee or director | 1 | $0 |
| ZACHARY TAYLOR | DIRECTOR Trustee or director | 1 | $0 |
| MIN HU | DIRECTOR Trustee or director | 1 | $0 |
| TADAO NAGATSUMA | DIRECTOR Trustee or director | 1 | $0 |
| EUN-MI CHOI | DIRECTOR Trustee or director | 1 | $0 |
| JAMES LLOYD-HUGHES | DIRECTOR Trustee or director | 1 | $0 |
| MICHELLE ORTOLANI | DIRECTOR Trustee or director | 1 | $0 |
| CHIKO OTANI | DIRECTOR Trustee or director | 1 | $0 |
| HELENA RODILLA | DIRECTOR Trustee or director | 1 | $0 |
| CLARA SARACENO | DIRECTOR Trustee or director | 1 | $0 |
| BERARDI SENSALE | DIRECTOR Trustee or director | 1 | $0 |
| LYUBOV TITOVA | DIRECTOR Trustee or director | 1 | $0 |
| DIETMAR WAGNER | DIRECTOR Trustee or director | 1 | $0 |
| QIANCHUN WENG | DIRECTOR Trustee or director | 1 | $0 |
| ROGER LEWIS | CHAIR Officer | 1 | $0 |
| ANDREA MARKELZ | VICE-CHAIR Officer | 1 | $0 |
| PETER H SIEGEL | GENERAL SECRETARY, TREASURER Officer | 2.5 | $0 |
990 for the year ended December 31, 2024: 33 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ENRIQUE CASTRO-CAMUS | DIRECTOR Trustee or director | 0.25 | $0 |
| MARTINA HAVENITH | DIRECTOR Trustee or director | 0.25 | $0 |
| FRANK HEGMANN | DIRECTOR Trustee or director | 0.25 | $0 |
| PETER UHD JEPSEN | DIRECTOR Trustee or director | 0.25 | $0 |
| DAVID COOKE | DIRECTOR Trustee or director | 0.25 | $0 |
| JEAN-FRANCOIS LAMPIN | DIRECTOR Trustee or director | 0.25 | $0 |
| JOHN JELONNEK | DIRECTOR Trustee or director | 0.25 | $0 |
| NURIA LLOMBART-JUAN | DIRECTOR Trustee or director | 0.25 | $0 |
| WEI LU | DIRECTOR Trustee or director | 0.25 | $0 |
| EMMA MACPHERSON | DIRECTOR Trustee or director | 0.25 | $0 |
| DANIEL MITTLEMAN | DIRECTOR Trustee or director | 0.25 | $0 |
| GREGORY DENISOV | DIRECTOR Trustee or director | 0.25 | $0 |
| TAIICHI OTSUJI | DIRECTOR Trustee or director | 0.25 | $0 |
| GUN-SIK PARK | DIRECTOR Trustee or director | 0.25 | $0 |
| ALEXANDER SHKURINOV | DIRECTOR Trustee or director | 0.25 | $0 |
| JAN STAKE | DIRECTOR Trustee or director | 0.25 | $0 |
| MASAHIKO TANI | DIRECTOR Trustee or director | 0.25 | $0 |
| MASAYOSHI TONOUCHI | DIRECTOR Trustee or director | 0.25 | $0 |
| MIRIAM SERENA VITIELLO | DIRECTOR Trustee or director | 0.25 | $0 |
| JEROME TIGNON | DIRECTOR Trustee or director | 0.25 | $0 |
| XI-CHENG ZHANG | DIRECTOR Trustee or director | 0.25 | $0 |
| AXEL ZEITLER | DIRECTOR Trustee or director | 0.25 | $0 |
| QING HU | DIRECTOR Trustee or director | 0.25 | $0 |
| GIAN PIERO GALLERANO | DIRECTOR Trustee or director | 0.25 | $0 |
| RICHARD J TEMKIN | DIRECTOR Trustee or director | 0.25 | $0 |
| YIMING ZHU | DIRECTOR Trustee or director | 0.25 | $0 |
| VINCE WALLACE | DIRECTOR Trustee or director | 2 | $0 |
| ZACHARY TAYLOR | DIRECTOR Trustee or director | 0.25 | $0 |
| MIN HU | DIRECTOR Trustee or director | 0.25 | $0 |
| TADAO NAGATSUMA | DIRECTOR Trustee or director | 0.25 | $0 |
| ROGER LEWIS | CHAIR Officer | 0.5 | $0 |
| ANDREA MARKELZ | VICE-CHAIR Officer | 0.25 | $0 |
| PETER H SIEGEL | GENERAL SECRETARY, TREASUR Officer | 2.5 | $0 |
990 for the year ended December 31, 2023: 33 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ENRIQUE CASTRO-CAMUS | DIRECTOR Trustee or director | 0 | $0 |
| MARTINA HAVENITH | DIRECTOR Trustee or director | 0 | $0 |
| FRANK HEGMANN | DIRECTOR Trustee or director | 0 | $0 |
| PETER UHD JEPSEN | DIRECTOR Trustee or director | 0 | $0 |
| DAVID COOKE | DIRECTOR Trustee or director | 0 | $0 |
| JEAN-FRANCOIS LAMPIN | DIRECTOR Trustee or director | 0 | $0 |
| JOHN JELONNEK | DIRECTOR Trustee or director | 0 | $0 |
| NURIA LLOMBART-JUAN | DIRECTOR Trustee or director | 0 | $0 |
| WEI LU | DIRECTOR Trustee or director | 0 | $0 |
| EMMA MACPHERSON | DIRECTOR Trustee or director | 0 | $0 |
| DANIEL MITTLEMAN | DIRECTOR Trustee or director | 0 | $0 |
| GREGORY DENISOV | DIRECTOR Trustee or director | 0 | $0 |
| TAIICHI OTSUJI | DIRECTOR Trustee or director | 0 | $0 |
| GUN-SIK PARK | DIRECTOR Trustee or director | 0 | $0 |
| ALEXANDER SHKURINOV | DIRECTOR Trustee or director | 0 | $0 |
| JAN STAKE | DIRECTOR Trustee or director | 0 | $0 |
| MASAHIKO TANI | DIRECTOR Trustee or director | 0 | $0 |
| MASAYOSHI TONOUCHI | DIRECTOR Trustee or director | 0 | $0 |
| MIRIAM SERENA VITIELLO | DIRECTOR Trustee or director | 0 | $0 |
| JEROME TIGNON | DIRECTOR Trustee or director | 0 | $0 |
| XI-CHENG ZHANG | DIRECTOR Trustee or director | 0 | $0 |
| AXEL ZEITLER | DIRECTOR Trustee or director | 0 | $0 |
| QING HU | DIRECTOR Trustee or director | 0 | $0 |
| GIAN PIERO GALLERANO | DIRECTOR Trustee or director | 0 | $0 |
| RICHARD J TEMKIN | DIRECTOR Trustee or director | 0 | $0 |
| YIMING ZHU | DIRECTOR Trustee or director | 0 | $0 |
| VINCE WALLACE | DIRECTOR Trustee or director | 0 | $0 |
| ZACHARY TAYLOR | DIRECTOR Trustee or director | 0 | $0 |
| MIN HU | DIRECTOR Trustee or director | 0 | $0 |
| TADAO NAGATSUMA | DIRECTOR Trustee or director | 0 | $0 |
| ROGER LEWIS | CHAIR Officer | 0 | $0 |
| ANDREA MARKELZ | VICE-CHAIR Officer | 0 | $0 |
| PETER H SIEGEL | GENERAL SECRETARY, TREASURER Officer | 0 | $0 |
Address and contacts
- Address (IRS master file)
- 5166 OAKWOOD AVE, LA CANADA, CA 91011-2452
- In care of
- % PETER H SIEGEL
- Mailing address (990-N for 2013)
- 5166 Oakwood Avenue, La Canada CA 91011
- Principal officer (990 for 2025)
- PETER H SIEGEL, 5166 OAKWOOD AVENUE, LA CANADA, CA 91011
- Principal officer (990-N for 2013)
- Peter H Siegel, 5166 Oakwood Avenue, La Canada CA 91011
- Signed the 990
- PETER H SIEGEL, GENERAL SECRETARY
- Phone
- (818) 669-9077
- Website
- www.irmmw-thz.org
- Return prepared by
- TEMO ARJANI LLP
California records
California keeps its own records of charities and corporations. Search them by EIN 27-0578778 or by the name INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES.
- 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
SCIENTIFIC SOCIETY THAT HOSTS ONE SCIENTIFIC CONFERENCE EACH CALENDAR YEAR, PROMOTES THE CONTRIBUTION OF RESEARCH TO TWO SCIENTIFIC JOURNALS (IEEE TRANS. ON TERAHERTZ SCIENCE AND TECHNOLOGY AND JOURNAL OF INFRARED, MILLIMETER, AND TERAHERTZ WAVES), AND SERVES AS STEWARD AND DISTRIBUTOR OF THE KENNETH J BUTTON PRIZE FOR SIGNIFICANT ADVANCES IN THE FIELD OF INFRARED, MILLIMETER, AND TERAHERTZ WAVES. THE SOCIETY IS AN ALL VOLUNTEER ORGANIZATION WITH BY LAWS AND WEBSITE AT WWW.IRMMW-THZ.ORG
Program accomplishments
- ESTABLISHED AND RELAYED SPECIFIC CONFERENCE GUIDELINES, PROMOTED THE CONFERENCE SERIES, SELECTED THE GENERAL LOCATION, DATE, LENGTH AND PROGRAM FOCUS, ASSURED A HIGH STANDARD OF SCIENTIFIC EXCELLENCE AT EACH VENUE, APPROVED THE LOCAL ORGANIZING COMMITTEE (LOC) CHAIR, AS WELL AS SPECIFIC CONFERENCE LOCATION, DATES, PROGRAM AND FINANCIAL ARRANGEMENTS, ASSISTED WITH INVITED SPEAKER SELECTIONS, MAINTAINED TECHNICAL CO-SPONSORSHIP WITH THE IEEE, ASSURED DIGEST ISSUANCE AND THE ARCHIVING OF PROCEEDINGS, AND BOTH SOUGHT AND MAINTAINED THE ENDORSEMENT AND APPROVAL OF THE ATTENDING SCIENTIFIC COMMUNITY.Expenses $48,713 · revenue $53,758
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 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 27-0578778
- 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
- 2016
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Science and technology (U99)
- Assets (IRS master file)
- $1,064,570
- Income (IRS master file)
- $168,149
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $131,333 | $51,440 | $1,064,570 | IRS |
| 990 | December 2024 | $286,453 | $85,560 | $984,677 | XML |
| 990 | December 2023 | $24,990 | $114,397 | $783,784 | XML |
| 990 | December 2022 | $66,800 | $62,061 | $873,186 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | December 2018 | – | – | – | IRS |
| 990-N for 2013 Officer: Peter H Siegel | December 31, 2013 | ≤ $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 27-0578778).
Questions about INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES
- What is the EIN of INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES?
- The employer identification number (EIN) of INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES is 27-0578778.
- Is INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2016.
- Are donations to INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES 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 INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES 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 INFRARED MILLIMETER AND TERAHERTZ WAVES last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES?
- The 990 for the year ended December 31, 2025 names PETER H SIEGEL.
- Who are the officers and directors of INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES?
- The 990 for the year ended December 31, 2025 lists 40 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL SOCIETY OF INFRARED MILLIMETER AND TERAHERTZ WAVES have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $131,333, expenses of $51,440 and total assets of $1,064,570 at year end.
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