Mackworth-Mendoza Foundation

Private foundation · Grantmaker Key Biscayne, FL EIN: 93-1296528

Mackworth-Mendoza Foundation is a private foundation, based in Key Biscayne, FL. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $1.0M in total assets. In 2025, it awarded 7 grants totaling $580K. Net investment income was $50K.

Key facts about Mackworth-Mendoza Foundation

In short: Mackworth-Mendoza Foundation gave $580K across 7 grants in 2025 (avg $83K), mostly in Oregon. Source: 2025 IRS Form 990-PF.

EIN
93-1296528
Latest 990 filing
Form 990-PF, 2025
Annual giving (2025)
$580,000
Grants made (2025)
7
Average grant
$82,857
Median grant
$5,000
Total assets
$1,043,870
Primary geography
Oregon (98% 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

$1.0M

-21.7% YoY

Annual Giving

$580K

+413.3% YoY

Grant Count

7

-12.5% YoY

Avg Grant Size

$83K

+486.6% YoY

Under IRS private-foundation payout rules, Mackworth-Mendoza Foundation reported a distributable amount of $58K for 2025 — the minimum it must pay out in qualifying distributions.

How Mackworth-Mendoza Foundation gives

  • Giving held roughly steady from 2022 to 2025 (+4%). Method
  • In 2025 it paid out well above 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

5states

Share of 2025 grant dollars across all 7 itemized grants.

Cities

PortlandPembroke ParkStanfordArlingtonGainesvilleAshlandBerkeleyKentLake Oswego

Giving Over Time

Total grant dollars and number of grants per year

$0$200K$400K$600K10 grants2020 7 grants2021 8 grants2022 10 grants2023 8 grants2024 7 grants2025

From 2020 to 2025, annual grant giving ranged from $57K (2021) to $580K (2025). In 2025 it made 7 grants totaling $580K.

Grant Insights

How this funder distributes its grants

Top Recipients

Top 7 recipients in 2025

Literary Arts: $550KLiterary Arts$550KThe International School: $13KThe International School$13KFeeding South Florida: $5KFeeding South Florida$5KOregon Food Bank: $5KOregon Food Bank$5KAmerican Diabetes Assoc: $3KAmerican Diabetes Assoc$3KHeal Palestine: $3KHeal Palestine$3KMeca for Peace: $3KMeca for Peace$3K

The largest 2025 recipient was Literary Arts ($550K). Together the top 7 received $580K.

Grant Size Distribution

40 grants across all recorded years

37<$50K1$50–100K$100–250K$250–500K2$500K–1M$1–5M$5M+

The most common grant size was under $50K: 37 grants of 40 (93%).

Giving History

Grant recipients and amounts by year

RecipientPurposeAmount
Literary Arts Portland, ORProgram Activities$550,000
The International School Portland, ORProgram Activities$12,500
Feeding South Florida Pembroke Park, FLProgram Sctivities$5,000
Oregon Food Bank Portland, ORProgram Activities$5,000
American Diabetes Assoc Arlington, VAProgram Activities$2,500
Heal Palestine Kent, OHProgram Activities$2,500
Meca for Peace Berkeley, CAProgram Activities$2,500

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$1,043,870$1,333,117$1,393,682
Revenue$53,391$56,629$57,967
Expenses$584,700$119,370$106,917
Qualifying Distributions$580,920$114,750$104,250
Net Investment Income$50,387$52,807$55,740
Distributable Amount$57,833$66,413$65,010

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 14, 2026)
  2. IRS filings on file for fiscal years 2020–2024

Leadership & Key People

Officers and directors from IRS filings

Mackworth-Mendoza Foundation is led by Hugh F. Mackworth, President on every filing since 2020; none of the 3 officers listed in 2025 report compensation.

Officers on the 2025 filing

  • Hugh F. Mackworth

    President

    On filings since 2020

    1 hr/week

    No compensation reported

  • Josie G. Mendoza

    Secretary

    On filings since 2020

    1 hr/week

    No compensation reported

  • Alexander Mackworth

    Member

    On filings since 2024

    1 hr/week

    No compensation reported

Former officers (1)
  • Former: Donald L. Krahmer Jr. (2020–2023) — Director

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 Mackworth-Mendoza Foundation

How much does Mackworth-Mendoza Foundation give each year?

Mackworth-Mendoza Foundation gave $580K across 7 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $113K across 8 grants.

What is Mackworth-Mendoza Foundation's typical grant size?

Mackworth-Mendoza Foundation's median grant in 2025 was $5,000, and its average grant was $82,857, across 7 grants on its 2025 IRS Form 990-PF.

Where does Mackworth-Mendoza Foundation give grants?

Mackworth-Mendoza Foundation gives mostly in Oregon: 98% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were Portland, OR (3 grants).

Does Mackworth-Mendoza Foundation give general operating support?

Not in 2025: none of the 7 grants with a stated purpose on Mackworth-Mendoza Foundation's 2025 IRS Form 990-PF were described as general or operating support. Recurring purposes include "Program Activities" (6 grants).

Who are Mackworth-Mendoza Foundation's largest grantees?

Mackworth-Mendoza Foundation's largest 2025 grantees include Literary Arts ($550,000), The International School ($12,500) and Feeding South Florida ($5,000), according to its 2025 IRS Form 990-PF. Together they received 98% of its itemized 2025 grant dollars.

How large is Mackworth-Mendoza Foundation?

Mackworth-Mendoza Foundation reported $1.0M in total assets on its 2025 IRS Form 990-PF. It paid out $581K in qualifying distributions that year, against a required minimum of $58K (roughly 5% of its investment assets).

What is Mackworth-Mendoza Foundation's EIN?

Mackworth-Mendoza Foundation's EIN (Employer Identification Number) is 93-1296528. 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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