Mr. Mark Miller reports

CONSTELLATION SOFTWARE INC. ANNOUNCES MARK LEONARD'S DECISION TO NOT STAND FOR RE-ELECTION TO BOARD OF DIRECTORS

Mark Leonard, the founder and former president of Constellation Software Inc., will not stand for re-election to the board of directors. His current term will conclude following Constellation's annual meeting of shareholders on May 15, 2026.

Mr. Leonard will continue to serve as an adviser to Constellation, with a particular focus on supporting the company's permanent engaged minority shareholder strategy -- an initiative centred on selective, long-term and engaged minority investments that complement Constellation's long-standing acquisition model.

Mark Miller, president of Constellation, stated: "Over more than three decades, Mark built Constellation into one of the world's most distinctive and successful software companies. From a small Toronto office, he developed a global portfolio of businesses and a deeply capable management culture operating across more than 150 countries.

"Equally important, Mark established a philosophy and operating discipline that will endure. His emphasis on decentralized leadership, developing and sharing best practices, long-term value creation, and the development of exceptional managers continues to define how we run the business.

"While we will miss Mark's presence in the boardroom, we are fortunate that he will remain engaged as an adviser. His perspective and investment expertise will be particularly valuable as we continue to expand our PEMS strategy."

John Billowits, chairman of the board, said: "Mark's influence on Constellation's culture and capital allocation discipline is foundational and enduring. The board remains confident in the company's strategy and leadership continuity."

In his April, 2018, president's letter, Mr. Leonard described his motivation: "You may have noticed that I deferred the 'why are we doing this?' question. The answer to that is personal to each of us who are involved in Constellation. My motivation is to help create a company where worthy people succeed. Whether they join us through an acquisition or are hired externally, I want to support and encourage employees who work hard, treat others well, continuously learn and share best practices."

That aspiration has been realized in the company he built. The entire constellation community expresses its deep gratitude to Mr. Leonard for his extraordinary leadership and enduring contributions. The company wishes him the very best in the years ahead.

About Constellation Software Inc.

Constellation's common shares are listed on the Toronto Stock Exchange under the symbol CSU. Constellation Software acquires, manages and builds vertical market software businesses.