Hedge fund billionaire Bill Ackman and his wife Neri Oxman are buying a nearly 5% stake in the Tel Aviv Stock Exchange, the bourse reported in a press release Wednesday.

The announcement came as the Israeli exchange announced the pricing of a secondary offering of 17,156,677 shares, or 18.5% of its market value, priced at 20.60 shekels ($5.50) per share, putting Ackman and his wife's purchase at about $25 million, according to CNBC calculations.

"The transaction drew robust interest from investors across Israel, the United States, Europe, and Australia, reflecting a strong vote of confidence in both the Tel Aviv Stock Exchange and the Israeli economy at large," the statement read.

"Among the prominent buyers were Neri Oxman and Bill Ackman who have agreed to purchase approximately a 4.9% equity stake in the TASE." The exchange plans "to use the net proceeds from this offering for investment in its technology infrastructure," it added.

Ackman, founder and CEO of New York-based Pershing Square Capital Management, has been a vocal supporter of Israel since the Oct. 7 Hamas terror attack on the country that triggered an Israeli ground invasion of the Gaza Strip. His wife, Oxman, is an American-Israeli architectural designer and professor.