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Main Capital’s Sjoerd Aarts shares plans as firm ups UK presence; Clearlake grows Chelsea FC stake; CVC DIF, Carlyle and EQT in security deals

Reported by Pehub
Sep 17, 2026· 2 min read
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Key Takeaways
  • • EQT's Mid Market Europe fund has signed a definitive agreement to sell Ontinue, an AI-powered managed cybersecurity services provider specializing in Microsoft architecture, to Quorum Cyber.
  • • Main Capital is expanding its UK presence with plans shared by founder Sjoerd Aarts, signaling growth in the British alternative investment market.
  • • Clearlake Capital has increased its stake in Chelsea Football Club, demonstrating continued investment in sports-related assets alongside core financial services holdings.
  • • CVC, Carlyle, and EQT are actively pursuing security-focused deal opportunities, reflecting sector-wide appetite for cybersecurity infrastructure investments.
Summary
EQT's Mid Market Europe fund has progressed a significant exit by signing a definitive agreement to divest Ontinue to Quorum Cyber. Ontinue operates as an AI-powered managed cybersecurity services provider with specific focus on Microsoft architecture, positioning it within the high-growth cybersecurity infrastructure segment that has attracted substantial institutional capital in recent years. The transaction underscores continued activity in the security services M&A market, where private equity sponsors are monetizing portfolio companies amid robust demand for specialized cyber defense capabilities.

Concurrently, Main Capital is strengthening its footprint in the United Kingdom market, with founder Sjoerd Aarts outlining expansion plans. This development reflects the ongoing competition among mid-market and lower mid-market private equity firms to establish or deepen regional platforms, particularly in mature European markets where deal flow and operational leverage remain attractive.

In parallel activities, Clearlake Capital has expanded its ownership position in Chelsea Football Club, continuing a pattern of alternative asset diversification among larger PE sponsors. CVC, Carlyle, and EQT are among the prominent sponsors actively engaging in security-related transactions, indicating broad institutional confidence in cybersecurity and defense infrastructure as defensive, recurring-revenue business models. These parallel moves demonstrate how leading alternative investment managers are simultaneously executing traditional sponsor-backed exits while pursuing adjacency strategies in sports, technology, and critical infrastructure sectors.

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Sources

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AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Pehub Main Capital’s Sjoerd Aarts shares plans as firm ups UK presence; Clearlake grows Chelsea FC stake; CVC DIF, Carlyle and EQT in security deals