Activist investor ValueAct Capital drastically reduced its position in database software company MongoDB (MDB) during the second quarter of 2026, selling nearly 875,000 shares. The sale, disclosed in a mandatory quarterly 13F filing, cut the firm's holding by 84% to 165,700 shares valued at $55.7 million as of June 30.

This filing reveals trades that occurred between April 1 and June 30, not a real-time transaction. The significant reduction liquidated an estimated $292.9 million worth of stock and decreased the position's weight in ValueAct's reported portfolio from 4.45% to just under 1%. ValueAct did not offer public commentary on the reason for the large-scale reduction.