A $238,510,408 shift in the Amazon position signals a recalibration at Pershing Square Capital that demands a closer look at how Bill Ackman is balancing his concentrated portfolio. With total assets under management reaching $13,714,299,861 across 11 distinct holdings, the decision to push harder into big tech while trimming older favorites speaks volumes about the firm’s current appetite for risk.

The tech pivot

The addition of Microsoft as a new position valued at $2,092,970,053, representing 15.26% of the portfolio, is the loudest move in this latest filing. It is a bold entry that instantly places the software giant among the fund’s elite tier, creating a structural shift away from the legacy holdings that defined the fund’s earlier years. When you contrast this with the reduction in the Brookfield Corp position—which now sits at $2,415,946,008 but remains the largest holding at 17.61% of the portfolio—the intent is clear. Pershing Square is not exiting its foundational bets, but it is certainly pruning them to accommodate a massive influx of capital into the cloud and AI space.

Checking the math on the other tech giants held by the fund, the Meta Platforms position was decreased to $1,522,358,404, or 11.10% of the book. It’s a classic rebalancing act. Contrast the aggressive buy-in of Microsoft with the quiet trimming of Meta, and you see a manager who is keeping his exposure to the sector high but clearly refining the internal ranking of his tech bets. This specific whale profile reveals how even a shop known for extreme conviction can shift its weight when new, high-conviction opportunities arise.

Trimming the service sector

While the big tech names move, the more traditional businesses in the portfolio are feeling the squeeze. Uber Technologies was marked as a "Decreased" holding, now valued at $2,154,934,398, which occupies 15.71% of the fund’s total value. It is interesting to see Uber take a backseat while Microsoft takes the stage. Similarly, Restaurant Brands International saw a reduction, leaving its position at $1,673,501,194, or 12.20% of the total asset base.

The quiet corners of the portfolio

The Howard Hughes Holdings position remains untouched at $1,192,581,569, anchoring the portfolio at 8.69% weight. It stands in stark contrast to the volatile turnover seen in the fund’s top-five holdings, serving as a reminder that some bets at Pershing Square are designed to be held through the cycle without interference.

Seaport Entertainment Group, holding steady at $107,910,794, represents a much smaller slice of the pie at just 0.78%. It is a curious outlier in a portfolio that usually leans toward massive, high-impact positions.

Finally, the Google position was also decreased, dropping to $89,421,720. For those tracking these movements, the screener remains the best way to see the full list of these individual adjustments as they evolve. The fund still holds 11 positions in total, maintaining a level of concentration that is atypical for most institutional managers of this size. By keeping the count low, each decision—like the reduction of the Google stake or the massive initiation of the Microsoft trade—carries significant weight. We are watching a portfolio that is currently undergoing a heavy rotation, prioritizing the scale of Microsoft’s infrastructure over the established growth rates of its previous service-sector darlings. Whether this shift signals a long-term change in thematic focus or just a temporary tactical adjustment will only become clear in the next cycle of filings.

This is not investment advice; 13F filings are delayed reports of past positions.