Mattis Family Foundation

Private foundation · Grantmaker Greenwich, CT EIN: 20-3538795

Mattis Family Foundation is a private foundation, based in Greenwich, CT. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $3.4M in total assets. In 2025, it awarded 8 grants totaling $280K. Net investment income was $171K.

Key facts about Mattis Family Foundation

In short: Mattis Family Foundation gave $280K across 8 grants in 2025 (avg $35K), mostly in Connecticut. Source: 2025 IRS Form 990-PF.

EIN
20-3538795
Latest 990 filing
Form 990-PF, 2025
Annual giving (2025)
$280,000
Grants made (2025)
8
Average grant
$35,000
Median grant
$15,000
Total assets
$3,445,607
Primary geography
Connecticut (75% 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

$3.4M

+5.3% YoY

Annual Giving

$280K

+30.2% YoY

Grant Count

8

-20.0% YoY

Avg Grant Size

$35K

+62.8% YoY

Under IRS private-foundation payout rules, Mattis Family Foundation reported a distributable amount of $170K for 2025 — the minimum it must pay out in qualifying distributions.

How Mattis Family Foundation gives

  • Giving held roughly steady from 2022 to 2025 (+14%). Method
  • In 2025 it paid out 167% of its IRS minimum distribution (the 5% rule). Method

From the foundation's IRS Form 990-PF filings. Methodology.

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Geographic Focus

Where this funder awards grants

Grant Distribution by State

7states

Share of 2025 grant dollars across all 8 itemized grants.

Cities

GreenwichNew YorkStockbridgeBerkeleySan FranciscoCos CobLakevilleHightstownNew MarketNorwalkTucson

Giving Over Time

Total grant dollars and number of grants per year

$0$100K$200K$300K10 grants2020 11 grants2021 10 grants2022 12 grants2023 10 grants2024 8 grants2025

From 2020 to 2025, annual grant giving ranged from $175K (2023) to $280K (2025). In 2025 it made 8 grants totaling $280K.

Grant Insights

How this funder distributes its grants

Top Recipients

Top 8 recipients in 2025

Greenwich Country Day School: $100KGreenwich Country Day School$100KEagle Hill School: $80KEagle Hill School$80KKripalu Center for Yoga & Health: $50KKripalu Center for Yoga &Health$50KBurning Man Project: $20KBurning Man Project$20KGreenwich Library: $10KGreenwich Library$10KNeighbor to Neighbor: $10KNeighbor to Neighbor$10KBruce Museum: $5KBruce Museum$5KGreenwich Historical Society: $5KGreenwich Historical Society$5K

The largest 2025 recipient was Greenwich Country Day School ($100K). Together the top 8 received $280K.

Grant Size Distribution

51 grants across all recorded years

44<$50K5$50–100K2$100–250K$250–500K$500K–1M$1–5M$5M+

The most common grant size was under $50K: 44 grants of 51 (86%).

Giving History

Grant recipients and amounts by year

RecipientPurposeAmount
Greenwich Country Day School Greenwich, CTEducation$100,000
Eagle Hill School Greenwich, CTEducation$80,000
Kripalu Center for Yoga & Health Stockbridge, MASpiritual Development$50,000
Burning Man Project San Francisco, CAArt, Music and Innovation$20,000
Greenwich Library Greenwich, CTEducation & Community Outreach Programs$10,000
Neighbor to Neighbor Greenwich, CTFood Bank$10,000
Bruce Museum Greenwich, CTEducation, Culture, Art$5,000
Greenwich Historical Society Cos Cob, CTEducation$5,000

Financial History

Multi-year comparison from IRS filings

Revenue
Expenses
Qualifying Distributions
Net Investment Income
$0$200K$400K$600K$800K2020 2021 2022 2023 2024 2025
Metric202520242023
Total Assets$3,445,607$3,272,811$3,077,401
Revenue$199,404$135,329$102,226
Expenses$311,386$245,254$212,290
Qualifying Distributions$283,122$218,064$177,844
Net Investment Income$171,140$102,933$65,654
Distributable Amount$169,586$164,893$149,674

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 15, 2026)
  2. IRS filings on file for fiscal years 2020–2024

Leadership & Key People

Officers and directors from IRS filings

Mattis Family Foundation's 2025 filing lists 2 officers; none of the 2 officers listed in 2025 report compensation.

Officers on the 2025 filing

  • Kathyrn Mattis

    Trustee

    On filings since 2020

    0.3 hrs/week

    No compensation reported

  • Peter Mattis

    Trustee

    On filings since 2020

    0.3 hrs/week

    No compensation reported

Data from IRS Form 990 filings, 2020–2025. "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 Mattis Family Foundation

How much does Mattis Family Foundation give each year?

Mattis Family Foundation gave $280K across 8 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $215K across 10 grants.

What is Mattis Family Foundation's typical grant size?

Mattis Family Foundation's median grant in 2025 was $15,000, and its average grant was $35,000, across 8 grants on its 2025 IRS Form 990-PF.

Where does Mattis Family Foundation give grants?

Mattis Family Foundation gives mostly in Connecticut: 75% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest states were Massachusetts (18%) and California (7%). The most frequent recipient cities were Greenwich, CT (5 grants).

Does Mattis Family Foundation give general operating support?

Not in 2025: none of the 8 grants with a stated purpose on Mattis Family Foundation's 2025 IRS Form 990-PF were described as general or operating support. Recurring purposes include "Education" (3 grants).

Who are Mattis Family Foundation's largest grantees?

Mattis Family Foundation's largest 2025 grantees include Greenwich Country Day School ($100,000), Eagle Hill School ($80,000) and Kripalu Center for Yoga & Health ($50,000), according to its 2025 IRS Form 990-PF. Together they received 82% of its itemized 2025 grant dollars.

How large is Mattis Family Foundation?

Mattis Family Foundation reported $3.4M in total assets on its 2025 IRS Form 990-PF. It paid out $283K in qualifying distributions that year, against a required minimum of $170K (roughly 5% of its investment assets).

What is Mattis Family Foundation's EIN?

Mattis Family Foundation's EIN (Employer Identification Number) is 20-3538795. IRS Form 990 filing data is available on this page for 2020–2025.

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

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