600 Israeli startups (55 last year) have donated equity stock or stock options to Israeli non-profit Tmura (see here). When any are taken-over or go public, Tmura receives the proceeds of the stock sales and donates it to charity. In 2018, Tmura gave NIS 1.6 million to good causes.
https://www.calcalistech.com/ctech/articles/0,7340,L-3756000,00.html