Three Sisters Foundation
EIN 900914803 Private Foundation
Possibly inactive.
Last 990-PF filing on record is from 2023
(3 years ago). Verify before investing time in an application.
Total Given 2016–2023
$21.1M
40 grants · $2.6M avg/year
based on 8 yrs of IRS 990-PF records on file
$1M+/yr
mid-tier
capacity
$200K
typical big bets · $25K–$500K
grant size
60%
deep partner · 9/15 multi-year
repeat
$66.2M
Assets (2023)
15
Distinct Recipients
Application Information
Accepts Unsolicited Proposals
No. Preselected Only
Phone
(302) 498-6000
Financial Trends
Giving Over Time
Total Assets Over Time
View financial data as table
| Year | Total Giving | Total Assets | Revenue | Grants |
|---|---|---|---|---|
| 2016 | $601K | $23.2M | $18.2M | 7 |
| 2017 | $1.3M | $26.8M | $2.4M | 7 |
| 2018 | $1.6M | $21.7M | $610K | 4 |
| 2019 | N/A | $25.2M | $892K | N/A |
| 2020 | $1.2M | $53.4M | $25.4M | 5 |
| 2021 | $2.4M | $71.3M | $74.4M | 6 |
| 2022 | $2.0M | $79.1M | $20.1M | 4 |
| 2023 | $12.0M | $66.2M | $12.9M | 7 |
Grant Size Distribution
Based on 40 grants on record
Minimum
$200
25th Pctl
$25K
Median
$200K
Average
$527K
75th Pctl
$500K
Maximum
$10.0M
Geographic Distribution
Officers & Directors
RC
Rockefeller Trust Company
8+ yrs
Administrative Trustee
ET
Eve Niquette Co Rockefeller Trust
6 yrs
Trustee
CT
Charles POHL Co Rockefeller Trust
8+ yrs
Trustee
RC
Rockefeller Trust Company
8+ yrs
Administrative Trustee
ET
Eve Niquette Co Rockefeller Trust
6 yrs
Trustee
CT
Charles POHL Co Rockefeller Trust
8+ yrs
Trustee
RC
Rockefeller Trust Company
8+ yrs
Administrative Trustee
ET
Eve Niquette Co Rockefeller Trust
6 yrs
Trustee
CT
Charles POHL Co Rockefeller Trust
8+ yrs
Trustee
RC
Rockefeller Trust Company
8+ yrs
Administrative Trustee
CT
Charles POHL Co Rockefeller Trust
8+ yrs
Trustee
ET
Eve Niquette Co Rockefeller Trust
6 yrs
Trustee
RC
Rockefeller Trust Company
8+ yrs
Administrative Trustee
CT
Charles POHL Co Rockefeller Trust
8+ yrs
Trustee
ET
Eve Niquette Co Rockefeller Trust
6 yrs
Trustee
ET
Eve Niquette Co Rockefeller Trust
6 yrs
Trustee
CT
Charles POHL Co Rockefeller Trust
8+ yrs
Trustee
RC
Rockefeller Trust Company
8+ yrs
Administrative Trustee
RC
Rockefeller Trust Company
8+ yrs
Administrative Trustee
ET
EVA Niquette Co Rockefeller Trust
2 yrs
Trustee
CT
Charles POHL Co Rockefeller Trust
8+ yrs
Trustee
CT
Charles POHL Co Rockefeller Trust
8+ yrs
Trustee
ET
EVA Niquette Co Rockefeller Trust
2 yrs
Trustee
RC
Rockefeller Trust Company
8+ yrs
Administrative Trustee
Grants Awarded (40 total)
| Purpose | ||||
|---|---|---|---|---|
| Massachusetts General Hospital | Boston, MA | $10,000,000 | UNRESTRICTED | 2023 |
| Urban School of San Francisco | San Francisco, CA | $1,015,000 | UNRESTRICTED | 2018 |
| University of Chicago | Chicago, IL | $1,000,000 | UNRESTRICTED | 2022 |
| International Rescue Committee | New York, NY | $1,000,000 | UNRESTRICTED | 2023 |
| International Rescue Committee | New York, NY | $800,000 | UNRESTRICTED | 2022 |
| International Rescue Committee | New York, NY | $750,000 | UNRESTRICTED | 2021 |
| International Rescue Committee | New York, NY | $680,000 | UNRESTRICTED | 2020 |
| Urban School of San Francisco | San Francisco, CA | $515,000 | UNRESTRICTED | 2017 |
| Swarthmore College | Swarthmore, PA | $500,000 | UNRESTRICTED | 2021 |
| University of Chicago | Chicago, IL | $500,000 | UNRESTRICTED | 2021 |
| University of Chicago | Chicago, IL | $500,000 | UNRESTRICTED | 2023 |
| Hamilton College | Clinton, NY | $487,500 | UNRESTRICTED | 2021 |
| International Rescue Committee | New York, NY | $350,000 | UNRESTRICTED | 2018 |
| University of Chicago | Chicago, IL | $320,000 | UNRESTRICTED | 2020 |
| International Rescue Committee | New York, NY | $300,000 | UNRESTRICTED | 2017 |
| International Rescue Committee | New York, NY | $250,000 | UNRESTRICTED | 2016 |
| Hamilton College | Clinton, NY | $250,000 | UNRESTRICTED | 2017 |
| University of Chicago | Chicago, IL | $200,000 | UNRESTRICTED | 2018 |
| Vanguard Charitable Endowment Program | Warwick, RI | $200,000 | UNRESTRICTED | 2023 |
| University of Chicago | Chicago, IL | $200,000 | UNRESTRICTED | 2016 |
| University of Chicago | Chicago, IL | $200,000 | UNRESTRICTED | 2017 |
| Breakthrough Collaborative | Oakland, CA | $150,000 | UNRESTRICTED | 2023 |
| Hamilton College | Clinton, NY | $125,000 | UNRESTRICTED | 2020 |
| Hamilton College | Clinton, NY | $125,000 | URESTRICTED | 2023 |
| Breakthrough Collaborative | Oakland, CA | $122,300 | UNRESTRICTED | 2016 |
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