Zend was bought by RogueWave who was bought by Perforce.

Zend was founded by Israelis, from that same article on Zend:

> Zend Technologies was founded by Andi Gutmans and Zeev Suraski who, along with other Israeli graduates of the Technion, the Israel Institute of technology

I am currently assuming it was founded in Israel, but to be fair the article does not explicitly say where it was founded.