Bill Ackman

Bill Ackman's Q1 2026 filing: largest single-quarter reshuffle on record with us ($6.6B since 2024-Q2) — opened MSFT, slashed GOOG, trimmed UBER and META.

Bill Ackman's latest quarterly filing marks the largest single-quarter reshuffle on record with us — $6.6B (since 2024-Q2) — anchored by a brand-new $2.1B Microsoft position and a near-complete exit from Alphabet's Class C shares. The headline move is the MSFT opening: 5.7 million shares worth $2.1B, representing roughly 15% of Ackman's disclosed book. On the other side of the ledger, Ackman nearly exited GOOG entirely — the largest reduction in GOOG on record with us, at −$1.8B (since 2024-Q2), cutting the position by 95% QoQ. GOOGL Class A shares were also trimmed for a 3rd consecutive quarter (−645.9k shares in 2026-Q1), down 95% QoQ as well. Two other names saw continued trimming. UBER was reduced for a 3rd consecutive quarter (−249.0k shares in 2026-Q1), leaving it at roughly 2% of disclosed book. META was trimmed by 12.7k shares (−$242.4M), also now at approximately 2% of portfolio. The one addition in the quarter was AMZN, where Ackman added 1.8 million shares (+$167.4M, +19% QoQ), a modest build representing about 1% of disclosed book. Taken together, the quarter's activity reflects a decisive rebalancing away from Alphabet and toward Microsoft as the portfolio's dominant large-cap technology anchor.