The Foundation is currently making grants in the range of $5,000 to $50,000.

Grants will only be made to  organizations  that are exempt under Section 501(c) (3) of the Internal Revenue Code.  No grants  may be made to individuals.  Applications for grants to be made by our fiscal year ending June 30th, must be received by March 15th. Applications received after March 15th will be considered in the subsequent fiscal year.

Grant applications should be submitted via the Foundation’s application portal

Should you need to reach the Foundation via USPS, correspondence should be sent to:

The Marinus & Minna B. Koster Foundation,  Inc. 
Attn: Robert Trinkle
Private Foundation Solutions
The Tower at PNC Plaza
300 Fifth Avenue, 27th Floor
Pittsburgh, PA 15222

If you or someone you know has any questions regarding the Foundation or the application, please contact Robert Trinkle at 412-762-2083 or