AI Rollups Hit Public Markets as $7.4B and $6.3B Take-Private Deals Emerge

On June 12, 2026, venture investors' "AI rollup" strategy was highlighted as it moved from mostly private acquisitions into two major public-to-private transactions. Trian Fund Management and General Catalyst agreed to take Janus Henderson private for about $7.4B, while Long Lake Management agreed in May 2026 to acquire American Express Global Business Travel for about $6.3B, offering shareholders $9.50 per share. The Amex GBT proposal included a 60.2% premium to the May 1 closing price, underscoring how aggressively buyers are pricing these AI-focused rebuild plans.