Yes, he was Jewish and Ukrainian to boot.

“Yes, Leo Radvinsky was Jewish. He was born into a Jewish family in Odesa, Ukraine, before his family emigrated to the United States when he was a child.

Wikipedia

Wikipedia

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While he rarely spoke publicly about his personal faith, his Jewish identity was often noted in biographical reports and through his philanthropic activities:

The Economic Times

The Economic Times

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Philanthropy: He was a significant donor to Jewish and Israeli causes. In 2024, reports identified him as the largest donor to the American Israel Public Affairs Committee (AIPAC), pledging $11 million to the organization.

Investments: His venture capital fund, Leo, made notable investments in Israel-based tech companies, such as B4X.

Early Life: Growing up in a Jewish community in Soviet-occupied Ukraine (prior to moving to Chicago) was a defining part of his early background.

(http://www.autoadmit.com/thread.php?thread_id=5849226&forum_id=2)#49765110)