The John Butler Mulliken Foundation Inc

Private foundation · Grantmaker Waltham, MA EIN: 04-3424901

The John Butler Mulliken Foundation Inc is a private foundation focused on Environment & Animals, based in Waltham, MA. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $1.3M in total assets. In 2025, it awarded 1 grant totaling $75K. Net investment income was $89K.

Key facts about The John Butler Mulliken Foundation Inc

In short: The John Butler Mulliken Foundation Inc gave $75K across 1 grant in 2025 (avg $75K), mostly in Massachusetts. Source: 2025 IRS Form 990-PF.

EIN
04-3424901
Latest 990 filing
Form 990-PF, 2025
Annual giving (2025)
$75,000
Grants made (2025)
1
Average grant
$75,000
Median grant
$75,000
Total assets
$1,299,236
Primary geography
Massachusetts (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

$1.3M

+0.3% YoY

Annual Giving

$75K

Grant Count

1

Avg Grant Size

$75K

Under IRS private-foundation payout rules, The John Butler Mulliken Foundation Inc reported a distributable amount of $77K for 2025 — the minimum it must pay out in qualifying distributions.

How The John Butler Mulliken Foundation Inc gives

  • Giving grew 51% from 2022 to 2025. Method
  • In 2025 it paid out 98% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. 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

1state

Share of all 1 itemized 2025 grant dollars.

Cities

BostonWaltham

Giving Over Time

Total grant dollars and number of grants per year

$0$20K$40K$60K$80K1 grants20200 grants20212 grants20221 grants20230 grants20241 grants2025

From 2020 to 2025, annual grant giving ranged from $399 (2020) to $75K (2025). In 2025 it made 1 grant totaling $75K.

Grant Insights

How this funder distributes its grants

Top Recipients

Top 1 recipients in 2025

Boston Children's Hospital Trust: $75KBoston Children's HospitalTrust$75K

The largest 2025 recipient was Boston Children's Hospital Trust ($75K).

Grant Size Distribution

4 grants across all recorded years

3<$50K1$50–100K$100–250K$250–500K$500K–1M$1–5M$5M+

The most common grant size was under $50K: 3 grants of 4 (75%).

Giving History

Grant recipients and amounts by year

RecipientPurposeAmount
Boston Children's Hospital Trust Boston, MASupport of Public Charity$75,000

Financial History

Multi-year comparison from IRS filings

Revenue
Expenses
Qualifying Distributions
Net Investment Income
$0$25K$50K$75K$100K202020212022202320242025
Metric202520242023
Total Assets$1,299,236$1,294,964$1,468,843
Revenue$90,395$44,593$-10,341
Expenses$76,523$7,358$35,223
Qualifying Distributions$75,000—$28,152
Net Investment Income$88,872$41,731$32,237
Distributable Amount$76,891$76,214$71,840

Data update history

When this profile's IRS filing data changed on Grantable

  1. Updated Form 990-PF for fiscal year 2020 (received by the IRS July 26, 2022)
  2. Updated Form 990-PF for fiscal year 2021 (received by the IRS July 7, 2023)
  3. Updated Form 990-PF for fiscal year 2022 (received by the IRS July 7, 2023)
  4. Updated Form 990-PF for fiscal year 2023 (received by the IRS April 15, 2024)
  5. Updated Form 990-PF for fiscal year 2024 (received by the IRS July 23, 2025)
  6. Updated Form 990-PF for fiscal year 2025 (received by the IRS April 15, 2026)
  7. IRS filings on file for fiscal years 2020–2025

Leadership & Key People

Officers and directors from IRS filings

The John Butler Mulliken Foundation Inc is led by John B. Mulliken MD, President on every filing since 2020; none of the 2 officers listed in 2025 report compensation.

Officers on the 2025 filing

  • John B. Mulliken MD

    President

    On filings since 2020

    5 hrs/week

    No compensation reported

  • Donna B. Elgart Medoff

    Treasurer

    On filings since 2022

    5 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 The John Butler Mulliken Foundation Inc

How much does The John Butler Mulliken Foundation Inc give each year?

The John Butler Mulliken Foundation Inc gave $75K across 1 grant in 2025, according to its 2025 IRS Form 990-PF.

How large is The John Butler Mulliken Foundation Inc?

The John Butler Mulliken Foundation Inc reported $1.3M in total assets on its 2025 IRS Form 990-PF. It paid out $75K in qualifying distributions that year, against a required minimum of $77K (roughly 5% of its investment assets).

What is The John Butler Mulliken Foundation Inc?

The John Butler Mulliken Foundation Inc is a private foundation focused on Environment & Animals, based in Waltham, MA. It holds $1.3M in total assets as of 2025.

Where does The John Butler Mulliken Foundation Inc operate?

The John Butler Mulliken Foundation Inc has awarded grants in Massachusetts.

What is The John Butler Mulliken Foundation Inc's EIN?

The John Butler Mulliken Foundation Inc's EIN (Employer Identification Number) is 04-3424901. 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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