Question 1

Is Hotrock Energy Research Organization a tax-exempt 501(c)(3)?

Accepted Answer

Yes — Hotrock Energy Research Organization is recognised by the IRS as a 501(c)(3) organisation (EIN 47-3849152). The IRS recognised Hotrock Energy Research Organization as tax-exempt in June 2015.

Question 2

What is Hotrock Energy Research Organization's EIN?

Accepted Answer

Hotrock Energy Research Organization's Employer Identification Number (EIN) is 47-3849152. The EIN was assigned by the IRS in June 2015. Donors and grantmakers use the EIN to verify tax-exempt status with the IRS.

Question 3

What does Hotrock Energy Research Organization do?

Accepted Answer

Research and development of geothermal systems

Question 4

Where is Hotrock Energy Research Organization located?

Accepted Answer

Hotrock Energy Research Organization is located at PO Box 31079, Seattle, WA, 98103.

Question 5

When was Hotrock Energy Research Organization founded or recognised by the IRS?

Accepted Answer

Hotrock Energy Research Organization was recognised by the IRS as a tax-exempt organisation in June 2015. The IRS ruling date is the earliest authoritative date available for most US nonprofits.

Question 6

What is Hotrock Energy Research Organization's annual revenue?

Accepted Answer

On its most recent Form 990 (fiscal year 2025), Hotrock Energy Research Organization reported $712K in total revenue and $695K in total expenses.

Question 7

Has Hotrock Energy Research Organization been auto-revoked by the IRS?

Accepted Answer

No — Hotrock Energy Research Organization (EIN 47-3849152) does not appear on the IRS Auto-Revocation List. Givalgo Discover cross-references the IRS Auto-Revocation List on every profile load; if status changes, this page reflects it.

Question 8

Is Hotrock Energy Research Organization listed in IRS Publication 78?

Accepted Answer

Yes — Hotrock Energy Research Organization is listed in IRS Publication 78 as an organisation eligible to receive tax-deductible charitable contributions. Pub 78 status is the canonical IRS signal that donations to an org are deductible.

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Hotrock Energy Research Organization

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