Building and Investing in Enduring Software Businesses

Continuous Improvement, Empowered Leaders, Enduring Growth

We invest in a special breed of software businesses that we have spent decades studying.
As an operating group of Constellation Software Inc. (TSX:CSU), we help good companies become great through data-driven guidance, permanent capital, and the accumulation of knowledge from over 800 acquisitions.

Perseus Group and Constellation Software Inc.

Operations in
+ Vertical Markets
Family of
+ Companies
Backed by Permanent Capital
+ Billion Invested
Growing Workforce of
+ Employees


Reinvest and Grow With
Permanent Capital
Pursuit of Mastery
Fostering a
Meritocratic Environment
Integrity is Foundational in
Everything We Do

Acquisition Criteria

B2B Software

Companies providing mission-critical solutions for niche markets and have loyal and diverse customer bases.

Recurring Revenue

Most earnings are generated through SaaS or maintenance revenue, which recurs annually or regularly.

Vertical Market

Niche markets are our specialty. We are industry agnostic in our pursuit of segment-defining brands.

In The Media

Discover the latest third party headlines to stay up to date with the latest aquisitions at Perseus Group.

How a Canadian Company Became the World's Premier Software Acquirer: access the article to explore Constellation's transformative strategies.

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Shakeup for local DMS market. $88 billion Toronto-based software group buys into Australia via purchase of Auto-IT

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Corum Group

2024 Global Tech M&A Report: Corum names Constellation Software The 2024 Top Volume Aquirer with 98 aquisitions completed in the past year

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The Globe and Mail

Constellation Software looks to ‘experiment’ by buying Canadian VC-backed companies

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Fostering Vertical Market Excellence

Permanent Home
Our buy-and-hold philosophy aligns the interests of employees and customers.
Domain expertise is one of our core pillars. Our industry experts have developed intimate knowledge of their business and customers, and they are empowered to operate autonomously.
Culture of Excellence
Our investment decisions are guided by the accumulation of learnings from each new acquisition. Our global network of entrepreneurs, software experts, and investment professionals provides a platform for leaders to thrive.
Success Stories
Explore Success Stories

The Latest Insights & News

Explore the latest news, insights, and articles from our vertical market investors and operators.

Business Owner
Success StoriesPost-Acquisition Interview with Auto-IT: A Journey of Growth, Strategic Sale, and a Promising Future
We interviewed Auto-IT's CEO, Wayne Rushworth, and Director of Sales and Marketing, Aaron Newman, about Auto-IT's growth, their decision to sell, and their post-acquisition experience. Their decision to sell to Perseus was largely based on cultural fit, long-term growth potential, and maintaining business integrity for clients and staff.
Dealership Industry


NewsCanadian Company Software Acquirer Economist
Dive into the pages of The Economist's insightful coverage as we unveil the remarkable journey of Constellation Software. Get the full story to gain a comprehensive understanding of our strategic approach in the dynamic software landscape of mergers and acquisitions.
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Business Owner
ArticlesFrom Company Founder to Serial Software Acquirer: Meet Portfolio Manager, Adam Zimmer
Adam Zimmer, a seasoned entrepreneur, transitioned from founding Arius Software in 1999 to becoming a Portfolio Manager at Perseus, managing and acquiring software companies. After over a decade of growth with Arius, Adam navigated the complexities of selling the company, offering valuable insights for founders considering similar paths.
Finance Industry
Associations Industry