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Nonprofit · EIN 47-0875432

SONOMA MOUNTAIN INSTITUTE

Tax-exempt · SANTA ROSA, CA 95404

Financials

$1.2M$947K2023$2.5M$1.2M2024
Revenue Expenses · by fiscal year end
Financials of SONOMA MOUNTAIN INSTITUTE by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2024990-PF$2,503,784$1,184,414$1,319,370$17,694,707$5,473$17,689,234
December 31, 2023990-PF$1,236,492$946,602$289,890$16,391,802$21,938$16,369,864
Financial details: 990-PF for the year ended December 31, 2024

Revenue

Contributions, gifts and grants
$2,259,618
Dividends
$20,894
Interest
$8,797
Net gain from sales of assets
$195,599
Other income
$18,876

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$210,601
Salaries, compensation and benefits (total)
$473,747
Disbursements for charitable purposes
$1,030,158
Excise tax on investment income
$2,847

Balance sheet and other

Total assets, start of year
$16,391,802
Total assets, end of year
$17,694,707
Total liabilities, end of year
$5,473
Net assets, end of year
$17,689,234
Fair market value of assets
$18,627,877
Qualifying distributions
$1,030,158
Net investment income
$225,290

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-PF for the year ended December 31, 2024, highest compensation first.

NameTitleHours / weekCompensation
Mark Sindt
747 Mount Howell Road, Colfax, CA 95713
Treasurer/Ex Di30$143,079
Cline B Johnson
PO Box 481, Winters, CA 95694
Land Projects Mgr
Highest-paid employee
40$91,725
Willliam Dellinger
7590 Red Hill Road, Petaluma, CA 94952
Grassland
Highest-paid employee
40$65,000
Cory Brush
5520 Alcott Drive, Sacramento, CA 95820
Restoration
Highest-paid employee
40$64,586
Aaron Gilliam
5223 Red Hill Road, Petaluma, CA 94952
Grassland
Highest-paid employee
40$58,000
Ben D'Aste Sims
PO Box 751251, Petaluma, CA 94975
Grassland Mgr
Highest-paid employee
40$55,920
Kate Randi Sindt
6815 Poca Montoya Drive, Granite Bay, CA 95746
Secretary/Admin30$54,562
Jim Coleman
15290 Coleman Valley Road, Occidental, CA 95465
Board member5$12,960
Jim Nelson
131 Camp Joy Road, Boulder Creek, CA 95006
Board member1$0
Brock Doleman
15290 Coleman Valley Road, Occidental, CA 95465
President5$0
990-PF for the year ended December 31, 2023: 10 people
NameTitleHours / weekCompensation
Cline B Johnson
PO Box 481, Winters, CA 95694
Land Projects Mgr
Highest-paid employee
40$91,725
Mark Sindt
747 Mount Howell Road, Colfax, CA 95713
Treasurer/Ex Di30$74,547
Willliam Dellinger
7590 Red Hill Road, Petaluma, CA 94952
Grassland
Highest-paid employee
40$58,461
Aaron Gilliam
5223 Red Hill Road, Petaluma, CA 94952
Grassland
Highest-paid employee
40$58,000
Ben D'Aste Sims
PO Box 751251, Petaluma, CA 94975
Grassland Mgr
Highest-paid employee
40$55,920
Brock Doleman
15290 Coleman Valley Road, Occidental, CA 95465
President5$54,562
Byron D Palmer
1601 Corporate Circle 5667, Petaluma, CA 94954
Grassland Mgr
Highest-paid employee
40$50,186
Jim Coleman
15290 Coleman Valley Road, Occidental, CA 95465
Board member5$12,540
Jim Nelson
131 Camp Joy Road, Boulder Creek, CA 95006
Board member1$0
Kate Randi Sindt
6815 Poca Montoya Drive, Granite Bay, CA 95746
Secretary/Admin30$0

Address and contacts

Address (IRS master file)
100 E ST STE 212, SANTA ROSA, CA 95404-4606
In care of
% KOCHENDERFER BUSINESS SERVICES
Signed the 990-PF
Mark Sindt, Treasurer/Ex Di
Phone
(530) 575-0659
Return prepared by
Karen Amoruso CPA

California records

California keeps its own records of charities and corporations. Search them by EIN 47-0875432 or by the name SONOMA MOUNTAIN INSTITUTE.

Attorney General, Registry of Charities and Fundraisers
Registration status and filed reports (CT-TR-1, RRF-1)

What it must file and when

IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026Not on file
2024December 31, 2024May 15, 2025990-PF on file
2023December 31, 2023May 15, 2024990-PF on file

IRS record

EIN
47-0875432
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Private operating foundation
Donations deductible (Pub 78)
Private operating foundation, 50% limit
Exempt since
2003
Accounting year ends
December
Files
Form 990-PF
Category (NTEE)
Environment (C34)
Assets (IRS master file)
$17,694,707
Income (IRS master file)
$3,654,702

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-PFDecember 2024$2,503,784$1,184,414$17,694,707IRS
990-PFDecember 2023$1,236,492$946,602$16,391,802XML
990-PFDecember 2022–––IRS
990-PFDecember 2021–––IRS
990-PFDecember 2020–––IRS
990-PFDecember 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 47-0875432).

Questions about SONOMA MOUNTAIN INSTITUTE

What is the EIN of SONOMA MOUNTAIN INSTITUTE?
The employer identification number (EIN) of SONOMA MOUNTAIN INSTITUTE is 47-0875432.
Is SONOMA MOUNTAIN INSTITUTE tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2003.
Are donations to SONOMA MOUNTAIN INSTITUTE tax-deductible?
Yes. It is listed in IRS Publication 78 (Private operating foundation, 50% limit).
Which annual return does SONOMA MOUNTAIN INSTITUTE file?
Form 990-PF. Private foundations file every year.
When is the next return of SONOMA MOUNTAIN INSTITUTE due?
The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did SONOMA MOUNTAIN INSTITUTE last file with the IRS?
The latest return in the IRS public files is the 990-PF for the year ended December 2024.
Who are the officers and directors of SONOMA MOUNTAIN INSTITUTE?
The 990-PF for the year ended December 31, 2024 lists 10 people; 8 received compensation from the organization, the highest $143,079 (Mark Sindt, Treasurer/Ex Di).
How much revenue does SONOMA MOUNTAIN INSTITUTE have?
On its 990-PF for the year ended December 31, 2024 it reported revenue of $2,503,784, expenses of $1,184,414 and total assets of $17,694,707 at year end.

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