Private foundation · Wilmington, DE

Three Sisters Foundation

View org profile →Find similar funders →Invitation only
Typical grant size
$48K – $188K – $328K
25th · median · 75th percentile
Unique recipients
10
Repeat grantees
6
funded 2+ years

Application procedures · from 2024 990-PF

Leadership · from 2024 990-PF

Rockefeller Trust Company
ADMINISTRATI
$10K
Charles Pohl Co Rockefeller Trust
TRUSTEE
Eve Niquette Co Rockefeller Trust
TRUSTEE
Eva Niquette Co Rockefeller Trust
TRUSTEE

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

Payout rate · TY 2024
0.4%
grants paid ÷ assets · ~5% IRS minimum
'17
'18
'19
'20
'21
'22
'23
'24
56
Total grants awarded
$23.8M
Total amount
$425K
Average grant
$10.0M
Largest grant

Giving by year

2024
$330K
2 grants
2023
$12.0M
7 grants
2022
$2.0M
4 grants
2021
$2.4M
6 grants
2020
$1.3M
5 grants
2019
$1.1M
5 grants
2018
$1.6M
4 grants
2017
$1.3M
7 grants
2016
$601K
7 grants
2015
$680K
4 grants
2014
$650K
5 grants

Top recipients

1 grant · MA · ≈ likely match
$10.0M
10 grants · NY · ✓ Exact match
$5.0M
10 grants · IL · ✓ Exact match
$3.5M
3 grants · CA · ✓ Exact match
$1.5M
Hamilton College
6 grants · NY
$1.2M
7 grants · CA · ✓ Exact match
$703K
1 grant · PA · ✓ Exact match
$500K
Vanguard Charitable Endowment Program
2 grants · RI
$300K
The Urban School
1 grant · CA
$255K
Vanguard Charitable Endowment Progr
1 grant · RI
$200K

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

Vanguard Charitable Endowment Progr
UNRESTRICTED
RI · TY 2024
$200K
Leahy Center for Lake Champlain
UNRESTRICTED
VT · TY 2024
$130K
Massachusetts General Hospital
UNRESTRICTED
MA · TY 2023
$10.0M
International Rescue Committee
UNRESTRICTED
NY · TY 2023
$1.0M
University of Chicago
UNRESTRICTED
IL · TY 2023
$500K
Vanguard Charitable Endowment Program
UNRESTRICTED
RI · TY 2023
$200K
Breakthrough Collaborative
UNRESTRICTED
CA · TY 2023
$150K
Hamilton College
URESTRICTED
NY · TY 2023
$125K
Stanford Institute for Economic Policy Research
UNRESTRICTED
CA · TY 2023
$25K
University of Chicago
UNRESTRICTED
IL · TY 2022
$1.0M
International Rescue Committee
UNRESTRICTED
NY · TY 2022
$800K
Breakthrough Collaborative
UNRESTRICTED
CA · TY 2022
$100K
Vanguard Charitable Endowment Program
UNRESTRICTED
RI · TY 2022
$100K
International Rescue Committee
UNRESTRICTED
NY · TY 2021
$750K
Swarthmore College
UNRESTRICTED
PA · TY 2021
$500K
University of Chicago
UNRESTRICTED
IL · TY 2021
$500K
Hamilton College
UNRESTRICTED
NY · TY 2021
$488K
Breakthrough Collaborative
UNRESTRICTED
CA · TY 2021
$100K
Stanford University
UNRESTRICTED
CA · TY 2021
$25K
International Rescue Committee
UNRESTRICTED
NY · TY 2020
$680K
University of Chicago
UNRESTRICTED
IL · TY 2020
$320K
Hamilton College
UNRESTRICTED
NY · TY 2020
$125K
University of California - San Francisco
UNRESTRICTED
CA · TY 2020
$100K
Leland Stanford Junior University
UNRESTRICTED
CA · TY 2020
$25K
International Rescue Committee
UNRESTRICTED
NY · TY 2019
$550K
Hamilton College
UNRESTRICTED
NY · TY 2019
$250K
University of Chicago
UNRESTRICTED
IL · TY 2019
$220K
Stanford University
UNRESTRICTED
CA · TY 2019
$25K
Urban School of San Francisco
UNRESTRICTED
CA · TY 2019
$10K
Urban School of San Francisco
UNRESTRICTED
CA · TY 2018
$1.0M
International Rescue Committee
UNRESTRICTED
NY · TY 2018
$350K
University of Chicago
UNRESTRICTED
IL · TY 2018
$200K
Stanford University
UNRESTRICTED
CA · TY 2018
$20K
Urban School of San Francisco
UNRESTRICTED
CA · TY 2017
$515K
International Rescue Committee
UNRESTRICTED
NY · TY 2017
$300K
Hamilton College
UNRESTRICTED
NY · TY 2017
$250K
University of Chicago
UNRESTRICTED
IL · TY 2017
$200K
Stanford Junior University
UNRESTRICTED
CA · TY 2017
$20K
Center for Reproductive Rights
UNRESTRICTED
NY · TY 2017
$1K
Breakthrough Collaborative
UNRESTRICTED
CA · TY 2017
$200
International Rescue Committee
UNRESTRICTED
NY · TY 2016
$250K
University of Chicago
UNRESTRICTED
IL · TY 2016
$200K
Breakthrough Collaborative
UNRESTRICTED
CA · TY 2016
$122K
Stanford Junior University
UNRESTRICTED
CA · TY 2016
$20K
Gladstone Institutes
UNRESTRICTED
CA · TY 2016
$5K
Hamilton College
UNRESTRICTED
NY · TY 2016
$3K
Center for Reproductive Rights
UNRESTRICTED
NY · TY 2016
$1K
University of Chicago
UNRESTRICTED
IL · TY 2015
$300K
International Rescue Committee
UNRESTRICTED
NY · TY 2015
$200K
Vanguard Charitable
UNRESTRICTED
PA · TY 2015
$125K

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