Sonoma Mountain Institute
Sonoma Mountain Institute is a private foundation focused on Environment & Animals, based in Colfax, CA. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $17.7M in total assets. In 2024, it made $1.0M in qualifying distributions. Net investment income was $205K.
Sonoma Mountain Institute at a glance
- Total assets
- $17,694,707
- +7.9% vs 2023
- Revenue (2024)
- $2,503,784
- +102.5% vs 2023
- Qualifying distributions (2024)
- $1,030,158
- +16.9% vs 2023
- Expenses (2024)
- $1,184,414
- +25.1% vs 2023
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated October 2026.
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Qualifying Distributions | Net Investment Income |
|---|---|---|---|---|---|
| 2024 | $17,694,707 | $2,503,784 | $1,184,414 | $1,030,158 | $204,828 |
| 2023 | $16,391,802 | $1,236,492 | $946,602 | $881,250 | $14,707 |
| 2022 | $16,091,185 | $1,018,419 | $815,676 | $784,886 | $18,642 |
| 2021 | $15,892,045 | $943,635 | $770,423 | $738,832 | $48,471 |
| 2020 | $15,710,043 | $808,825 | $729,887 | — | $76,218 |
Leadership & Key People
Officers and directors from IRS filings
Sonoma Mountain Institute is led by Brock Doleman, President on every filing since 2020; 3 of 5 officers listed in 2024 are compensated.
Officers on the 2024 filing
Brock Doleman
President
On filings since 2020
5 hrs/week
$55K (2023) → $0 (2024)
Jim Coleman
Board Member
On filings since 2020
5 hrs/week
$9K (2020) → $13K (2024)
Kate Randi Sindt
Secretary & Administrator
Secretary → Secretary & Administrator, 2021
On filings since 2020
30 hrs/week
$52K (2021) → $55K (2024)
Mark Sindt
Treasurer & Executive Di
On filings since 2020
30 hrs/week
$69K (2020) → $143K (2024)
Jim Nelson
Board Member
On filings since 2020
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2020–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $143K, to Mark Sindt (Treasurer/Ex Di). 3 officers or directors reported compensation on that filing.
Frequently asked questions about Sonoma Mountain Institute
How large is Sonoma Mountain Institute?
Sonoma Mountain Institute reported $17.7M in total assets on its 2024 IRS Form 990-PF. Its revenue that year was $2.5M.
What is Sonoma Mountain Institute?
Sonoma Mountain Institute is a private foundation focused on Environment & Animals, based in Colfax, CA. It holds $17.7M in total assets as of 2024.
What is Sonoma Mountain Institute's EIN?
Sonoma Mountain Institute's EIN (Employer Identification Number) is 47-0875432. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated October 2026. Sourced from IRS Form 990-PF filings.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2020 (received by the IRS May 13, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 30, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS July 7, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS November 5, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS November 11, 2025)
- IRS filings on file for fiscal years 2020–2024
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Sonoma Mountain Institute down — hundreds of funders to go?