The Stainman Family Foundation is a left-of-center grantmaking organization that supports taxpayer-funded abortion, left-leaning social activism, left-leaning election law organizations, and environmentalist organizations.  It was established in by Arthur Stainman and his wife Lois in 1998 and makes contributions to left of-center organizations. 
In 2018 the Stainman Family Foundation received $2,055,665 in grants and contributions, and $445,254 in dividends and interest from securities.  The organization reported $3,188,479 in total revenue, $1,789,233 in expenses, and $16,121,509 in net assets after accounting for all liabilities. 
The Stainman Family Foundation contributes to organizations that support taxpayer-funded abortions, left-leaning social activism and election law focused organizations, and environmentalist organizations. 
Organizations supported by the foundation have advocated for political candidates that seek to expand access to abortion through taxpayer funding, organizations that seek to increase abortion clinics in minority communities, and legislation that would outlaw state laws that place guard rails on when a medical professional can perform abortions. 
In 2018, the foundation made contributions to NARAL Pro-Choice America (NARAL) ($100,0000), Trust Women Foundation ($25,000), Center for Reproductive Rights ($6,000) Planned Parenthood ($40,000), Abortion Care Network ($5,000), and Women Have Options ($1,000). 
Social Activism and Election Law
Organizations supported by the foundation advocate for limiting free speech activity, advocacy for gay, lesbian, and transgender issues, and organizations that provide legal and healthcare services to illegal immigrants. 
Organizations supported by the foundation have prevented the development and natural resource extraction of land by directly purchasing land for conservation and organizations that oppose the development of public lands populated by wildlife through litigation and advocacy. 
Lois Stainman is listed as the fifth largest donor to People for the American Way (PFAW), a social-liberal organization that seeks to limit the spread of right-of-center principles and ideas. PFAW reports that she has made $566,717 in contributions to PFAW but does not specify whether Stainman contributed directly or whether the contributions were made through the Stainman Family Foundation.
The Stainman Family Foundation president is Arthur Stainman, a managing director at the asset management firm First Manhattan Company. Stainman’s wife, Lois Stainman, is the vice president of the foundation.