Costa-Olson Family Foundation

Private foundation · Grantmaker Modesto, CA EIN: 93-4819152

Costa-Olson Family Foundation is a private foundation, based in Modesto, CA. IRS filing data is available from 2023 through 2025. As of 2025, the organization holds $4.9M in total assets. In 2025, it awarded 7 grants totaling $255K. Net investment income was $201K.

Key facts about Costa-Olson Family Foundation

In short: Costa-Olson Family Foundation gave $255K across 7 grants in 2025 (avg $36K), mostly in California. Source: 2025 IRS Form 990-PF.

EIN
93-4819152
Latest 990 filing
Form 990-PF, 2025
Annual giving (2025)
$255,100
Grants made (2025)
7
Average grant
$36,443
Median grant
$25,000
Total assets
$4,924,579
Primary geography
California (100% of itemized 2025 grant dollars)

Data from IRS Form 990-PF, 2025; updated September 2026.

Financial Overview

From 2025 IRS Form 990-PF · View filing

Total Assets

$4.9M

-1.3% YoY

Annual Giving

$255K

-11.5% YoY

Grant Count

7

+40.0% YoY

Avg Grant Size

$36K

-36.8% YoY

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Geographic Focus

Where this funder awards grants

Grant Distribution by State

1state

Share of 2025 grant dollars across all 7 itemized grants.

States

Cities

San FranciscoModesto

Giving Over Time

Total grant dollars and number of grants per year

$0$100K$200K$300K0 grants2023 5 grants2024 7 grants2025

From 2024 to 2025, annual grant giving ranged from $255K (2025) to $288K (2024). In 2025 it made 7 grants totaling $255K.

Grant Insights

How this funder distributes its grants

Top Recipients

Top 7 recipients in 2025

Salvation Army: $105KSalvation Army$105KTown School for Boys: $70KTown School for Boys$70KSan Francisco Museum of Modern Art: $35KSan Francisco Museum of ModernArt$35KSan Francisco Symphony: $25KSan Francisco Symphony$25KCalifornia Academy of Sciences: $10KCalifornia Academy of Sciences$10KChildren of Shelters Cos: $5KChildren of Shelters Cos$5KSmart- Schools Mentoring Resource T: $5KSmart- Schools MentoringResource T$5K

The largest 2025 recipient was Salvation Army ($105K). Together the top 7 received $255K.

Grant Size Distribution

12 grants across all recorded years

7<$50K3$50–100K2$100–250K$250–500K$500K–1M$1–5M$5M+

The most common grant size was under $50K: 7 grants of 12 (58%).

Giving History

Grant recipients and amounts by year

RecipientPurposeAmount
Salvation Army Modesto, CASupport general purposes of the organization$105,100
Town School for Boys San Francisco, CASupport general purposes of the organization$70,000
San Francisco Museum of Modern Art San Francisco, CASupport general purposes of the organization$35,000
San Francisco Symphony San Francisco, CASupport general purposes of the organization$25,000
California Academy of Sciences San Francisco, CASupport general purposes of the organization$10,000
Children of Shelters Cos San Francisco, CASupport general purposes of the organization$5,000
Smart- Schools Mentoring Resource T San Francisco, CASupport general purposes of the organization$5,000

Financial History

Multi-year comparison from IRS filings

Revenue
Expenses
Qualifying Distributions
Net Investment Income
$0$2M$4M$6M2023 2024 2025
Metric202520242023
Total Assets$4,924,579$4,989,227$5,007,886
Revenue$201,342$274,091$5,017,656
Expenses$265,984$292,750$9,770
Qualifying Distributions$255,100$288,200—
Net Investment Income$201,342$254,091$7,886

Data update history

When this profile's IRS filing data changed on Grantable

  1. Added Form 990-PF for fiscal year 2025 (received by the IRS May 12, 2026)
  2. IRS filings on file for fiscal years 2023–2024

Leadership & Key People

Officers and directors from IRS filings

Costa-Olson Family Foundation is led by Kelsie Costa, President & Director on every filing since 2023; none of the 3 officers listed in 2025 report compensation.

Officers on the 2025 filing

  • Kelsie Costa

    President & Director

    On filings since 2023

    1 hr/week

    No compensation reported

  • Christopher Olson

    Secretary & Director

    On filings since 2023

    1 hr/week

    No compensation reported

  • Jeffrey R. Hamilton

    Treasurer & Director

    On filings since 2023

    1 hr/week

    No compensation reported

Data from IRS Form 990 filings, 2023–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.

Frequently asked questions about Costa-Olson Family Foundation

How much does Costa-Olson Family Foundation give each year?

Costa-Olson Family Foundation gave $255K across 7 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $288K across 5 grants.

What is Costa-Olson Family Foundation's typical grant size?

Costa-Olson Family Foundation's median grant in 2025 was $25,000, and its average grant was $36,443, across 7 grants on its 2025 IRS Form 990-PF.

Where does Costa-Olson Family Foundation give grants?

Costa-Olson Family Foundation gives mostly in California: 100% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were San Francisco, CA (6 grants).

Does Costa-Olson Family Foundation give general operating support?

Yes: 100% of Costa-Olson Family Foundation's 2025 grants with a stated purpose (7 of 7) were for general or operating support, per its 2025 IRS Form 990-PF.

Who are Costa-Olson Family Foundation's largest grantees?

Costa-Olson Family Foundation's largest 2025 grantees include Salvation Army ($105,100), Town School for Boys ($70,000) and San Francisco Museum of Modern Art ($35,000), according to its 2025 IRS Form 990-PF. Together they received 82% of its itemized 2025 grant dollars.

How large is Costa-Olson Family Foundation?

Costa-Olson Family Foundation reported $4.9M in total assets on its 2025 IRS Form 990-PF. Its revenue that year was $201K.

What is Costa-Olson Family Foundation's EIN?

Costa-Olson Family Foundation's EIN (Employer Identification Number) is 93-4819152. IRS Form 990 filing data is available on this page for 2023–2025.

Data last updated September 2026. Sourced from IRS Form 990-PF filings.

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