Nonprofit · EIN 54-1758092
AMERICAN ROCK MECHANICS ASSOCIATION
Also known as ARMA
Tax-exempt · EATON, CO 80615
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $573,012 | $557,939 | $15,073 | $633,587 | $0 | $633,587 |
| December 31, 2024 | 990 | $710,048 | $678,241 | $31,807 | $618,514 | $0 | $618,514 |
| December 31, 2023 | 990 | $589,072 | $602,389 | -$13,317 | $597,846 | $11,139 | $586,707 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $39,005
- Membership dues
- $39,005
- Program service revenue
- $516,202
- Investment income
- $17,805
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Travel
- $8,771
- Program services (functional)
- $557,939
Balance sheet and other
- Total assets, start of year
- $618,514
- Total assets, end of year
- $633,587
- Total liabilities, end of year
- $0
- Net assets, end of year
- $633,587
- Net assets without donor restrictions
- $633,587
- Gross receipts
- $573,012
- Employees
- 0
- Year formed
- 1996
- State of legal domicile
- VA
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 |
|---|---|---|---|
| ZACH AGIOUTANTIS | DIRECTOR Trustee or director | – | $0 |
| CHLOE ARSON | DIRECTOR Trustee or director | – | $0 |
| ANDREW BUNGER | PAST PRESIDE Trustee or director, Officer | – | $0 |
| EGOR DONTSOV | DIRECTOR Trustee or director | – | $0 |
| TRYANA GARZA-CRUZ | DIRECTOR Trustee or director | – | $0 |
| ERIC GUSTAFSON | EXECUTIVE DI Trustee or director | – | $0 |
| MENGSU HU | DIRECTOR Trustee or director | – | $0 |
| OMID MAHABADI | DIRECTOR Trustee or director | – | $0 |
| SHAWN MAXWELL | DIRECTOR Trustee or director | – | $0 |
| ROMAIN PRIOUL | VICE PRESIDE Trustee or director, Officer | – | $0 |
| RICHARD SCHULTZ | DIRECTOR Trustee or director | – | $0 |
| RITA SOUSA | TREASURER Trustee or director, Officer | – | $0 |
| GABRIEL WALTON | PRESIDENT Trustee or director, Officer | – | $0 |
| KAN WU | DIRECTOR Trustee or director | – | $0 |
990 for the year ended December 31, 2024: 12 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ZACH AGIOUTANTIS | DIRECTOR Trustee or director | – | $0 |
| ANDREW BUNGER | PRESIDENT Trustee or director, Officer | – | $0 |
| TRYANA GARZA-CRUZ | DIRECTOR Trustee or director | – | $0 |
| ERIC GUSTAFSON | EXECUTIVE DI Trustee or director | – | $0 |
| MENGSU HU | DIRECTOR Trustee or director | – | $0 |
| KATHY KALENCHUK | DIRECTOR Trustee or director | – | $0 |
| SHAWN MAXWELL | DIRECTOR Trustee or director | – | $0 |
| ROMAIN PRIOUL | DIRECTOR Trustee or director | – | $0 |
| RITA SOUSA | TREASURER Trustee or director, Officer | – | $0 |
| GABRIEL WALTON | VICE PRESIDE Trustee or director, Officer | – | $0 |
| HERB WANG | PAST PRESIDE Trustee or director | – | $0 |
| PAUL YOUNG | DIRECTOR Trustee or director | – | $0 |
990 for the year ended December 31, 2023: 13 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ANDREW BUNGER | PRESIDENT Officer | – | $0 |
| GABRIEL WALTON | VICE PRESIDE Officer | – | $0 |
| RITA SOUSA | TREASURER Officer | – | $0 |
| GANG HAN | IMMEDIATE PA Officer | – | $0 |
| ZACH AGIOUTANTIS | DIRECTOR Trustee or director | – | $0 |
| TRYANA GARZA-CRUZ | DIRECTOR Trustee or director | – | $0 |
| MENGSU HU | DIRECTOR Trustee or director | – | $0 |
| KATHY KALENCHUK | DIRECTOR Trustee or director | – | $0 |
| SHAWN MAXWELL | DIRECTOR Trustee or director | – | $0 |
| ROMAIN PRIOUL | DIRECTOR Trustee or director | – | $0 |
| RICHARD SCHULTZ | DIRECTOR Trustee or director | – | $0 |
| HERBERT WANG | DIRECTOR Trustee or director | – | $0 |
| R PAUL YOUNG | DIRECTOR Trustee or director | – | $0 |
Address and contacts
- Address (IRS master file)
- 360 OAK AVE STE 140, EATON, CO 80615-3495
- In care of
- % AMERICAN ROCK MECHANICS ASSOCIATI
- Principal officer (990 for 2025)
- GABRIEL WALTON, 360 OAK AVE, SUITE 140, EATON, CO 80615
- Signed the 990
- ERIC GUSTAFSON, EXECUTIVE DIRECTOR
- Phone
- (703) 801-1088
- Website
- WWW.ARMAROCKS.ORG
- Return prepared by
- PAUL E SHAPIRO
Mission
SOLE DIRECT LINK IN THE US TO TEACHERS AND STUDENTS IN THE FIELD OF ROCK MECHANICS AND ROCK ENGINEERING. SERVES AS AN ADVOCATE FOR FIRMS AND INDIVIDUALS WHO REPRESENT ALL ASPECTS OF ROCK MECHANICS AND ROCK ENGINEERING TO DISSEMINATE INFORMATION THROUGH MEETINGS, PUBLICATIONS AND THE INTERNET.
Program accomplishments
- THE US ROCK MECHANICS SYMPOSIUM SERVES AS THE DIRECT LINK IN THE UNITED STATES TO THE PROFESSIONALS, FIRMS, EDUCATORS AND STUDENTS IN THE FIELDS OF ROCK MECHANICS AND ROCK ENGINEERING.
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
- 54-1758092
- Tax-exempt status
- 501(c)(6): Business league or chamber of commerce
- Donations deductible
- No
- Exempt since
- 1999
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Community improvement and capacity building (S41)
- Assets (IRS master file)
- $633,587
- Income (IRS master file)
- $573,012
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $573,012 | $557,939 | $633,587 | XML |
| 990 | December 2024 | $710,048 | $678,241 | $618,514 | XML |
| 990 | December 2023 | $589,072 | $602,389 | $597,846 | XML |
| 990 | December 2022 | $412,286 | $146,872 | $791,991 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | December 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 54-1758092).
Questions about AMERICAN ROCK MECHANICS ASSOCIATION
- What is the EIN of AMERICAN ROCK MECHANICS ASSOCIATION?
- The employer identification number (EIN) of AMERICAN ROCK MECHANICS ASSOCIATION is 54-1758092.
- Is AMERICAN ROCK MECHANICS ASSOCIATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 1999.
- Are donations to AMERICAN ROCK MECHANICS ASSOCIATION tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does AMERICAN ROCK MECHANICS ASSOCIATION 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 AMERICAN ROCK MECHANICS ASSOCIATION 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 AMERICAN ROCK MECHANICS ASSOCIATION 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 AMERICAN ROCK MECHANICS ASSOCIATION?
- The 990 for the year ended December 31, 2025 names GABRIEL WALTON.
- Who are the officers and directors of AMERICAN ROCK MECHANICS ASSOCIATION?
- The 990 for the year ended December 31, 2025 lists 14 people; 0 received compensation from the organization.
- How much revenue does AMERICAN ROCK MECHANICS ASSOCIATION have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $573,012, expenses of $557,939 and total assets of $633,587 at year end.
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