Lawrence a & Joan E Siff Foundation

WORCESTER, MA EIN: 42-1612889

Lawrence a & Joan E Siff Foundation is a nonprofit organization focused on Philanthropy, Voluntarism & Grantmaking, based in WORCESTER, MA. IRS filing data is available from 2019 through 2024. In 2024, it awarded 6 grants totaling $7K.

Financial Overview

From 2024 IRS Form 990-PF · View filing

Total Assets

Annual Giving

$7K

-39.2% YoY

Grant Count

6

-40.0% YoY

Avg Grant Size

$1K

+1.3% YoY

About Lawrence a & Joan E Siff Foundation

Based on IRS filings

Lawrence a & Joan E Siff Foundation is a nonprofit organization focused on Philanthropy, Voluntarism & Grantmaking, based in WORCESTER, MA. IRS filing data is available from 2019 through 2024. In 2024, it awarded 6 grants totaling $7K.

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Geographic Focus

Where this funder awards grants

Grant Distribution by State

6states

Cities

BOSTONBRIGHTONBROCKTONCHESTNUT HILLCINCINNATICONCORDDANVERSDORCHESTERHINGHAMHYANNISLAKE FOREST PARKLEXINGTONLINCOLNMEDFORDMINNEAPOLISNEEDHAMNEW YORKNEWTONPROVIDENCERANDOLF

Financial History

Multi-year comparison from IRS filings

Revenue
Expenses
Qualifying Distributions
Net Investment Income
$0$0.275$0.55$0.8250000000000001$1.1201920202021202220232024
Metric202420232022
Total Assets
Revenue
Expenses
Qualifying Distributions
Net Investment Income
Distributable Amount

Giving Over Time

Total grant dollars and number of grants per year

$0$11K$22K$33K$44K16 grants201912 grants202018 grants202121 grants202210 grants20236 grants2024

Grant Insights

How this funder distributes its grants

Top Recipients

Top 6 recipients in 2024

MUSEUM OF SCIENCE$3KTWO TEN INTERNATIONAL FO…$2KFRANCISCAN HOSPITAL FOR …$1KTHE WINDSOR SCHOOL$700TUFTS UNIVERSITY$200MUSEUM OF FINE ARTS$150

Grant Size Distribution

67 grants across all recorded years

67<$50K$50–100K$100–250K$250–500K$500K–1M$1–5M$5M+

Giving History

Grant recipients and amounts by year

Among its reported 2024 grants, the largest include Museum of Science ($3,000), Two Ten International Footwear Foundation ($1,500), Franciscan Hospital for Children ($1,000).

RecipientPurposeAmount
FRANCISCAN HOSPITAL FOR CHILDREN BRIGHTON, MAGENERAL$1,000
MUSEUM OF FINE ARTS BOSTON, MAGENERAL$150
MUSEUM OF SCIENCE BOSTON, MAGENERAL$3,000
THE WINDSOR SCHOOL BOSTON, MAGENERAL$700
TUFTS UNIVERSITY MEDFORD, MAGENERAL$200
TWO TEN INTERNATIONAL FOOTWEAR FOUNDATION WALTHAM, MAGENERAL$1,500

Leadership & Key People

Officers and directors from IRS filings

Compensation Overview

From 2024 IRS filing

From 2024 filing

NameTitleHoursCompensation
LAWRENCE A SIFFTRUSTEE1
JOAN E SWARTZ-SIFFTRUSTEE1
SHIRLEY S SIFFTRUSTEE1
STEFAN NATHANSONTRUSTEE1

Subject Areas

Focus areas based on grantmaking activity

Frequently Asked Questions

What is Lawrence a & Joan E Siff Foundation?

Lawrence a & Joan E Siff Foundation is a nonprofit organization focused on Philanthropy, Voluntarism & Grantmaking, based in WORCESTER, MA. It holds — in total assets as of 2024.

Where does Lawrence a & Joan E Siff Foundation operate?

Lawrence a & Joan E Siff Foundation has awarded grants in Massachusetts, Minnesota, New York, Ohio, Rhode Island, Washington.

What size grants does Lawrence a & Joan E Siff Foundation award?

In 2024, Lawrence a & Joan E Siff Foundation awarded 6 grants totaling $7K — an average of about $1K per grant, based on its IRS Form 990 filings.

What is Lawrence a & Joan E Siff Foundation's EIN?

Lawrence a & Joan E Siff Foundation's EIN (Employer Identification Number) is 42-1612889. IRS Form 990 filing data is available on this page for 2019–2024.

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

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