Third Street Foundation
The organization is a private foundation dedicated to providing financial support primarily for educational institutions and humanitarian causes. Its mission reflects a commitment to general support for various nonprofits, including those focused on health, civil rights, and food insecurity. The foundation serves a diverse array of recipients, including universities, health organizations, and community service groups. It has a notable emphasis on supporting institutions like Harvard College and various humanitarian organizations, indicating a strong interest in education and global aid.
Source: Zeffy Agent · Mar 2026
Ideal Applicant
An established nonprofit with an existing relationship or visible connection to the foundation’s network, operating in education, cultural institutions, human services, or established national relief organizations, especially in Massachusetts or the Northeast.
Good Fit
- • A track record as a registered charity or established institution (schools, museums, well-known relief organizations).
- • Existing connection to board members, officers, or known grantees (referrals or introductions).
- • Programs aligned with education, cultural heritage, human services, or humanitarian relief.
- • Located in or serving Massachusetts/the Northeast, or otherwise visible to the foundation’s network.
Geography
Grants are multi-state (seven states observed) but the latest year is regionally concentrated, with over half of dollars going to Massachusetts.
Recipient Variety
The foundation funded around 21 distinct recipients in the latest year and supports many independent charities across education, culture, health, and relief, even though a few recipients capture a large share of dollars.
New Applicants
Direct evidence of recipient turnover exists (several new grantees each year) but the foundation explicitly declares awards are to preselected recipients and filings show no public application route, so unsolicited applicants are unlikely to be able to enter the portfolio without an introduction.
Source: Zeffy Agent · Mar 2026
