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Enological Supply Organization

EIN 82-1458355 · Napa, CA

Public records raise at least one point you should look into before giving.

LegitimacyCautionRegistration and standingFinancial healthNot ratedToo small or too little detailGovernanceNot ratedThe short tax form does not cover thisImpact evidenceDescribes programsHow well its results are evidenced

What it says it does

TO SERVE AS THE REFERENCE FOR GOVERNMENTAL, INDUSTRY AND SCIENTIFIC BODIES REGARDING THE REGULATION AND KNOWLEDGE OF TECHNICAL WINEMAKING MATERIALS AND PROCESSES

Income
$58,500
Spending
$66,800

Source: Form 990EZ for the year ending December 31, 2025, filed with the Internal Revenue Service. How we rate

Financial health

We do not score finances when yearly spending is very small or the return has too little detail. The ratios stop meaning much at that size.

Source: Form 990EZ for the year ending December 31, 2025, filed with the Internal Revenue Service. How we rate

Governance

This organization files the short tax form, which does not ask about boards, policies or audits. That is normal for a small charity and is not a mark against it.

Source: Form 990EZ for the year ending December 31, 2025, filed with the Internal Revenue Service. How we rate

Impact evidence

Describes programs. Its tax return describes what it does but we have found no measurable results in it.

Programs described in its return (3)
  1. ESO PROMOTES AND SUPPORTS THE REGULATION AND USAGE OF WINE TREATING MATERIALS IN THE WINEMAKING COMMUNITY. IN 2025, ESO AND THE WINE INSTITUTE TECHNICAL ADVISORY COMMITTEE (WITAC) WILL CONTINUE
  2. ADVOCATING FOR FASTER REGULATORY APPROVAL OF NEW ENOLOGICAL PRODUCTS. ESO PARTICIPATES IN ALL THE WINE INSTITUTE BOARD MEETINGS. ESO HAS SUCCESSFULLY LOBBIED UC DAVIS UNIVERSITY AND
  3. CAL POLY TO COLLABORATE IN A PROPOSED STREAMLINING OF A TTB (ALCOHOL & TOBACCO TAX AND TRADE BUREAU) APPROVAL PROCESS THAT WILL BE JOINTLY PRESENTED TO THE TTB IN 2026.

Source: Form 990EZ for the year ending December 31, 2025, filed with the Internal Revenue Service. How we rate

Legitimacy checks

  1. Is it registered with the IRS? Passed.

    Listed in the IRS master file of tax-exempt organizations as a 501(c)(6) business league.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.

  2. Has the IRS revoked its tax-exempt status? Passed.

    Not on the IRS automatic revocation list.

    Source: Automatic revocation of exemption list, Internal Revenue Service, file dated October 13, 2026.

  3. Are donations tax-deductible? Caution.

    The IRS master file records contributions to this 501(c)(6) business league as not deductible.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.

  4. Is it keeping up with its IRS filings? Passed.

    Most recent return on file covers the year ending December 2025.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.

  5. How long has it been tax-exempt? Passed.

    Recognized by the IRS since March 2018.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.

  6. Is it in good standing with state regulators? Passed.

    Not on California's list of charities barred from soliciting. Other states are not yet checked.

    Source: May Not Operate or Solicit for Charitable Purposes list, California Attorney General, Registry of Charities and Fundraisers, file dated October 21, 2026.

Ratings and checks are our reading of public records, using the published method. They are not a statement about anyone's honesty. If you work for this organization, you can send corrections or results, confirm you want gifts through Veridonate, or ask to be removed from giving.