Private foundation · Princeton, NJ

Osullivan Foundation Trust Dtd 122299

View org profile →Find similar funders →Invitation only
Typical grant size
$10K – $45K – $75K
25th · median · 75th percentile
Unique recipients
10
Repeat grantees
2
funded 2+ years

Application procedures · from 2024 990-PF

Leadership · from 2024 990-PF

Sean M O'sullivan
TRUSTEE
Marie T O'sullivan
TRUSTEE
Anne S O'sullivan
TRUSTEE

Source: IRS Form 990-PF, Part VII. Officers, directors, and trustees as reported by the foundation.

Payout rate · TY 2024
15.1%
grants paid ÷ assets · ~5% IRS minimum
'18
'19
'20
'21
'22
'23
'24
39
Total grants awarded
$10.7M
Total amount
$275K
Average grant
$1.9M
Largest grant

Giving by year

2024
$3.6M
13 grants
2023
$1.0M
16 grants
2022
$884K
1 grants
2021
$2.0M
2 grants
2020
$1000K
1 grants
2019
$1.0M
1 grants
2018
$1.2M
5 grants

Top recipients

See Attached List
4 grants · NY
$4.9M
3 grants · CA · ✓ Exact match
$2.6M
1 grant · NY · ✓ Exact match
$1.4M
2 grants · CA · ✓ Exact match
$982K
International Assocation of Spelling As Communication
8 grants · VA
$360K
1 grant · AZ · ✓ Exact match
$101K
Yale University Development
1 grant · CT
$50K
1 grant · CA · ✓ Exact match
$50K
Schoolhouse World Inc
1 grant · VA
$50K
Dr Christopher Patzke
1 grant · IN
$45K

Recipient names are as reported on the 990-PF. ✓ Exact match = EIN matched to IRS records by exact name + state; ≈ likely match = EIN inferred from a closely similar name. The recipient EIN is never stated on the form — it is DoubleNine’s match.

Recent grants · most recent filings first

Rensselaer Polytechnic Institute
EDUCATION
NY · TY 2024
$1.4M
Khan Academy
ONLINE EDUCATION SERVICES SUPPORT
CA · TY 2024
$1.4M
The Brain Foundation
AUTISM RESARCH
CA · TY 2024
$550K
Multiple Hub Inc
AUTISM SERVICES
CA · TY 2024
$50K
International Assocation of Spelling As Communication
AUTISM COMMUNICATION, TRAINING, ADVOCACY
VA · TY 2024
$40K
International Assocation of Spelling As Communication
AUTISM COMMUNICATION, TRAINING, ADVOCACY
VA · TY 2024
$40K
International Assocation of Spelling As Communication
AUTISM COMMUNICATION, TRAINING, ADVOCACY
VA · TY 2024
$40K
International Assocation of Spelling As Communication
AUTISM COMMUNICATION, TRAINING, ADVOCACY
VA · TY 2024
$40K
Us Ireland Alliance
SCHOLARSHIPS & OPERATIONS
VA · TY 2024
$25K
The Learning Cooperatives
EDUCATION
PA · TY 2024
$10K
Autism Science Foundation
AUTISM RESEARCH
NY · TY 2024
$10K
Mount St Dominic Academy
EDUCATION
NJ · TY 2024
$5K
Mercy for Animals
ANIMAL WELFARE
CA · TY 2024
$3K
The Brain Foundation
AUTISM RESARCH
CA · TY 2023
$432K
Autism Discovery and Treatment Foundation
AUTISM RESEARCH
AZ · TY 2023
$101K
International Assocation of Spelling As Communication
AUTISM COMMUNICATION, TRAINING, ADVOCACY
VA · TY 2023
$50K
International Assocation of Spelling As Communication
AUTISM COMMUNICATION, TRAINING, ADVOCACY
VA · TY 2023
$50K
International Assocation of Spelling As Communication
AUTISM COMMUNICATION, TRAINING, ADVOCACY
VA · TY 2023
$50K
Schoolhouse World Inc
ONLINE EDUCATION SERVICED
VA · TY 2023
$50K
International Assocation of Spelling As Communication
AUTISM COMMUNICATION, TRAINING, ADVOCACY
VA · TY 2023
$50K
O'sullivan Foundationdr John-paul Yu
AUTISM RESARCH
WI · TY 2023
$45K
Paul Ashwood Uc Davis
AUTISM RESARCH
CA · TY 2023
$45K
Dr Frankovich - Stanford University
AUTISM RESARCH
CA · TY 2023
$45K
Dr Christopher Patzke
AUTISM RESARCH
IN · TY 2023
$45K
Juergen Hahn Sponsored Research Grant
AUTISM RESARCH
NY · TY 2023
$25K
Khan Academy
ONLINE EDUCATION SERVICES SUPPORT
CA · TY 2023
$4K
2m Foundation - Scribe3
AUTISM COMMUNICATION TOOL DEVELOPMENT
CA · TY 2023
$4K
Mercer County Special Services School
SPECIAL EDUCATION SERVICES
NJ · TY 2023
$4K
Trinity Foundation Donation David Olowookere
SHOLARSHIP FOR HIGHER EDUCATION
NJ · TY 2023
$3K
See Attached List
GENERAL
NY · TY 2022
$884K
See Attached List
GENERAL CHARITABLE PURPOSES
NY · TY 2021
$1.9M
Community Heath & Wellness
GENERAL PURPOSES
CT · TY 2021
$18K
See Attached List
GENERAL CHARITABLE PURPOSES
NY · TY 2020
$1000K
See Attached List
GENERAL CHARITABLE PURPOSES
NY · TY 2019
$1.0M
Khan Academy
GENERAL CHARITABLE PURPOSES
CA · TY 2018
$1.1M
Yale University Development
General Charitable Purposes
CT · TY 2018
$50K
The Sapling Foundation Llc
GENERAL CHARITABLE PURPOSES
NY · TY 2018
$7K
N of One
general charitable purposes
TX · TY 2018
$5K
Kulen Outreach Cambodia Schools
general charitable purposes
NY · TY 2018
$2K

Source: IRS Form 990-PF, Part XV. Up to 50 most recent grants shown.