Frequently asked questions

If you would like to donate funds to Third Act through your Donor Advised Fund (DAF), you will need the EIN number (tax ID number) of our fiscal sponsor, the Sustainable Markets Foundation: 13-4188834.

If you would like to donate by check, please use the following address & memo line:

Sustainable Markets Foundation
45 West 36th Street, 6th Floor
New York, NY 10018-7635
Memo line: Third Act

Third Act can accept gifts of stock. Please send an email to for instructions about how to begin a transfer.

Third Act is a recognized partner of 1% for the Planet. If your business is interested in donating through that program, you can find us in their non-profit directory, or by writing directly to Gabi Freeda at