Portside, a leading provider of modern, cloud-based software solutions for global aviation, today announced a new investment from Vista Equity Partners ("Vista"), a global technology investor that specializes in enterprise software. The investment will accelerate platform integration, advance Portside's AI-enabled roadmap and further scale its global go-to-market capabilities. Current investor Insight Partners will remain a significant shareholder in Portside.

Portside simultaneously announced that Brandon Holden will be appointed Chief Executive Officer to lead the company’s next phase of growth. Holden succeeds Alek Vernitsky, Co-Founder of Portside, who will continue to serve Portside as a Strategic Advisor, focusing on product vision, AI innovation and customer engagement, as well as a member of the company’s Board of Directors.

Holden joins Portside with over two decades of experience leading and scaling high-growth businesses. He most recently served as Chief Executive Officer of Eptura, where he led the integration of multiple acquisitions into a unified global platform, driving operational discipline and go-to-market transformation. He also previously held senior leadership roles at LogicMonitor, Accruent and Forcepoint.

“Portside powers some of the most critical workflows in global aviation, spanning scheduling, safety and compliance, owner support and leasing," said Holden. "Our opportunity now is to extend that leadership by delivering an even more unified and intelligent platform that connects the entire operational lifecycle. This next chapter is about scaling what we've built and elevating it to define the category globally."

"Building Portside alongside co-founder Alek Strygin from the ground up and watching it become the platform that the world's leading aviation operators depend on has been the privilege of my career," said Vernitsky. "Brandon’s experience and focus on operational rigor make him exactly the right leader to take the company to an even higher altitude at this important stage. I’m proud of what we’ve accomplished and excited to work with Brandon and our amazing team as we continue our efforts to provide our customers with the industry’s most modern and comprehensive platform across the full spectrum of aviation.”

Since Vista's initial investment in 2024, Portside has strengthened its position as a leading cloud-native platform for business aviation, regional commercial airlines and aircraft leasing and finance. Now, with deepened investment from Vista, the company is entering an ambitious next phase — one centered on defining the global standard for modern aviation software. This includes continued development of Portside Horizon, its cloud-based flight management system, as well as expanded customer success and go-to-market capabilities designed to deliver seamless efficiency, enhanced decision-making and broader operational control for operators, airlines and lessors worldwide.

"We’ve had a front-row seat to Portside's disciplined early growth and the burgeoning opportunity to scale its platform across every corner of aviation software, a market that is both large and underpenetrated," said Rachel Arnold, Co-Head of Vista's Endeavor Fund and Senior Managing Director. "We are pleased to deepen our partnership with Portside to build on this momentum and enable the company’s ambitious expansion strategy."

"Portside's platform has been purpose-built to meet the operational demands its customers face across many aspects of their business," said Ben Benson, Managing Director at Vista Equity Partners. "This investment is about deepening those capabilities and helping to accelerate an AI-enabled roadmap that reflects the real demands of global aviation."

Terms of the transaction were not disclosed. Lowenstein Sandler LLP served as legal counsel to Portside. Kirkland & Ellis LLP served as legal counsel to Vista.

About Portside

Portside is a leading provider of advanced software solutions for the global aviation industry, supporting business and corporate aviation, government operators, commercial airlines, and aircraft leasing and finance organizations. With a team of more than 330 professionals across 40+ countries, Portside serves over 1,300 enterprise customers worldwide, helping modern aviation organizations operate more efficiently, securely, and intelligently. For more information, contact us at sales@portside.aero or visit www.portside.aero

About Vista Equity Partners

Vista is a global technology investor that specializes in enterprise software. Vista’s private market strategies seek to deliver differentiated returns through a proprietary and systematic approach to value creation developed and refined over the course of 25 years and 600+ transactions. Today, Vista manages a diversified portfolio of software companies that provide mission-critical solutions to millions of customers around the world. As of September 30, 2025, Vista had more than $107 billion in assets under management. Further information is available at vistaequitypartners.com. Follow Vista on LinkedIn, @Vista Equity Partners, and on YouTube, @Vista_Equity_Partners.

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