The Frederick Henry Prince Testamentary Trust (Prince Charitable Trusts) is made up of three left-leaning arts and social activism funds which support both apolitical and left-leaning non-profit groups in Washington, D.C.; Newport, Rhode Island; and Chicago, Illinois. It was established in 1947 by investor Frederick Henry Prince and his wife, Abbie Norman Prince. 
The Prince Charitable Trusts has expanded under Prince’s descendants. The organization provided over $100 million between 2000 and 2015 in its three geographic areas of focus. Its funding has shifted toward environmental programs since 2000, especially from its D.C. office. 
The Trusts’ mission is to fund non-profits in the three geographic regions in which the Prince family has significant ties. Most of the Trusts’ donations are nonpolitical and go to arts, health, land conservation, and other projects. 
The Trusts funds religious groups that engage in secular activities, such as a chapter of Catholic Charities. It states that it does not fund groups which “discriminate” in areas such as race, gender identity, or veteran status. 
As of May 31, 2018, it was affiliated with a number of art, environment, homelessness, abortion, and other groups in Chicago, D.C., and elsewhere. 
The Prince Charitable Trusts is largely funded by asset sales and dividends from its $150 million in assets.  Most of its grants are between $10,000 and $50,000.  Grants make up virtually all of its expenses. Examples of Grant Recipients
Many of the Trusts’ grant recipients are apolitical art, environmental, health, and social improvement organizations such as the Gruben Charitable Foundation, which was started in 2008 by Prince’s great-great-granddaughter.  However, a number of left-leaning groups have received grants. Looking at the Trusts’ 2014 tax returns:
- Three Planned Parenthood affiliates received a combined $60,000. Planned Parenthood of Southern New England received $30,000 for public policy and advocacy work.
The Women’s Health & Education Fund, which advocates for abortion in Rhode Island, received $15,000. 
- A project of the liberal media group Democracy Now received $1,500.
- $15,000 was provided to the environmentalist social activist group DC Greens.
In 2015, the Trusts gave $10,000 to the left-leaning public policy group Center on Budget and Policy Priorities. It gave $12,500 to the eco-video group Environmental Film Festival in the Nation’s Capital and $35,000 to Planned Parenthood of Southern New England. 
- The Environmental Law and Policy Center, which received $30,000.
- Planned Parenthood of Metropolitan Washington, which received $40,000.
- The Conservation Law Foundation received $20,000.
- The documentary organization Kartemquin Films received $90,000 for a three-year grant.
The Prince Charitable Trusts have several people in key leadership roles. 
Diana Prince and Patrick Wood-Prince are the Trusts’ trustees. Wood-Prince was previously a director with real estate firm Jones Lang Lasalle before launching his own company in 2018. 
Carolynn Brunette has been managing director since 2015. She previously held senior positions in other philanthropic organizations. 
Charles Twichell is Executive Director of the Trusts and has been with the organization since 1999 in several roles. He was previously in leadership roles with theater and arts entities.