SD Trombetta Foundation

Foundation · Grantmaker Los Gatos, CA EIN: 77-0342667

SD Trombetta Foundation is a private foundation based in Los Gatos, California. The organization holds 501(c)(3) status and was established in 1993 according to its IRS ruling year.

Key facts about SD Trombetta Foundation

EIN: 77-0342667
Latest 990 filing: Form 990-PF, 2024
Annual giving (2024): $713,000
Grants made (2024): 13
Average grant: $54,846
Median grant: $50,000
New grantees (estimate): 8% first-time grantees (1 of 13, 2024)
Total assets: $2,032,157
Primary geography: California (58% of itemized 2024 grant dollars)

Data from IRS Form 990-PF, 2024; updated September 2026. New grantees are estimated by matching recipient names across years (methodology).

Who SD Trombetta Foundation funds

By grant dollars, the top recipient states for SD Trombetta Foundation's 13 itemized 2024 grants were California (58%), Massachusetts (14%) and District of Columbia (7%). The most frequent recipient cities were Boston, MA (2 grants), San Jose, CA (2 grants), Oakland, CA (2 grants) and Washington, DC (2 grants). None of its 13 grants with a stated purpose were described as general or operating support. Recurring purposes include "Support of Charitable Organization." (11 grants).

Is SD Trombetta Foundation open to new grantees?

first-time grantees, 2024

In 2024, 1 of 13 grantees (8%) were first-time recipients. First grants averaged $3K; repeat grants $59K. How we count

Medians: $3K first-time, $50K repeat.

85% of 2024 grantees were also funded in 2023. Method
Giving fell 28% from 2021 to 2024. Method
In 2024 it paid out 510% of its IRS minimum distribution (the 5% rule). Method

Estimate from itemized IRS Form 990-PF grant lists (2020–2024). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.

Next steps with SD Trombetta Foundation

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Financial Overview

From 2024 IRS Form 990-PF · View filing

Total Assets

$2.0M

-10.5% YoY

Annual Giving

$713K

-27.6% YoY

Grant Count

-35.0% YoY

Avg Grant Size

$55K

+11.4% YoY

Under IRS private-foundation payout rules, SD Trombetta Foundation reported a distributable amount of $140K for 2024 — the minimum it must pay out in qualifying distributions.

Research compiled by Grantable AI from public sources. Last updated April 2026.

Mission & Focus Areas

The foundation's grant-making priorities focus on:

Education
Philanthropy, Voluntarism & Grantmaking
Human Services

Within education, the foundation has demonstrated particular interest in science education, STEM education, and support for education nonprofits.

Grantmaking

Based on the most recent IRS Form 990 filing (2024), the foundation distributed $713,000 in total giving during that period.

Average Grant

amount and median grant amount data are available but specific figures were not fully detailed in source materials

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Geographic Focus

Where this funder awards grants

The foundation primarily directs its grant-making to organizations in:

California
Massachusetts
District of Columbia

Grant Distribution by State

California $410K (58%)

Massachusetts $100K (14%)

District of Columbia $53K (7%)

Texas $50K (7%)

Alabama $50K (7%)

All other $50K (7%)

Share of all 13 itemized 2024 grant dollars.

States

Alabama California District of Columbia Georgia Hawaii Kentucky Massachusetts Maryland Mississippi Nevada New York Oregon Texas Virginia

Cities

San JoseWashingtonNew YorkBostonOaklandAptosArlingtonBeaumontMontgomeryPortlandSan FranciscoAtlantaAustinRockvilleSan RafaelCupertinoFederickFrankfortGilroyGulfport

Financial History

Multi-year comparison from IRS filings

Assets: $2,032,157

Annual Giving: $713,000 (based on 2024 IRS Form 990 filing)

The foundation's financial data is derived from digitized IRS Form 990 filings, with information last updated February 24, 2026.

Revenue

Expenses

Qualifying Distributions

Net Investment Income

Metric	2024	2023	2022
Total Assets	$2,032,157	$2,271,388	$3,012,126
Revenue	$485,130	$257,255	$457,504
Expenses	$722,771	$1,001,193	$1,216,955
Qualifying Distributions	$713,000	$985,000	$1,197,000
Net Investment Income	$485,130	$252,534	$445,342
Distributable Amount	$139,860	$138,334	$185,892

Data update history

When this profile's IRS filing data changed on Grantable

March 3, 2026 IRS filings on file for fiscal years 2020–2024

Giving Over Time

Total grant dollars and number of grants per year

Grant Insights

How this funder distributes its grants

Top Recipients

Top 10 recipients in 2024

Grant Size Distribution

88 grants across all recorded years

Giving History

Grant recipients and amounts by year

Among its reported 2024 grants, the largest recipients include Cabrillo College Foundation ($200,000), AAUW ($75,000), American Red Cross ($50,000).

Recipient	Purpose	Amount
Cabrillo College Foundation Aptos, CA	Support of private foundation.	$200,000
AAUW San Jose, CA	Support of Charitable Organization.	$75,000
American Red Cross Beaumont, TX	Support of Charitable Organization.	$50,000
Clean Air Task Force Boston, MA	Support of Charitable Organization.	$50,000
Give Well Top Charities Fund Oakland, CA	Support of Charitable Organization.	$50,000
The Humane Farming Association San Rafael, CA	Support of Charitable Organization.	$50,000
Southern Poverty Law Center Montgomery, AL	Support of Charitable Organization.	$50,000
Planned Parenthood Washington, DC	Support of Charitable Organization.	$50,000
Last Mile Health Boston, MA	Support of Charitable Organization.	$50,000
World Food Program	Support of Charitable Organization.	$50,000

Leadership & Key People

Officers and directors from IRS filings

Compensation Overview

No officer or director reported compensation in the available filings.

From 2024 IRS filing

Name	Title	Hours	Compensation
Anne Decker	Director	1	—
Diane Trombetta	President	1	—
Liza Reynolds	Director	1	—
Loren Reynolds	Director	1	—

Frequently Asked Questions

What does SD Trombetta Foundation fund?

The foundation's grant-making priorities focus on: • Education • Philanthropy, Voluntarism & Grantmaking • Human Services Within education, the foundation has demonstrated particular interest in science education, STEM education, and support for education nonprofits.

How do I apply for a grant from SD Trombetta Foundation?

**Grant Amounts:** • Typical awards range from $3,000 to $407,000 • Average grant amount and median grant amount data are available but specific figures were not fully detailed in source materials **Recent Activity:** Based on the most recent IRS Form 990 filing (2024), the foundation distributed $713,000 in total giving during that period.

Where does SD Trombetta Foundation make grants?

The foundation primarily directs its grant-making to organizations in: • California • Massachusetts • District of Columbia

What size grants does SD Trombetta Foundation award?

In 2024, SD Trombetta Foundation awarded 13 grants totaling $713K — an average of about $55K per grant, based on its IRS Form 990 filings.

How much is SD Trombetta Foundation required to give away each year?

Private foundations must generally distribute about 5% of their assets annually. For 2024, SD Trombetta Foundation reported a distributable amount of $140K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.