Bill Ackman’s Microsoft (MSFT) position
Reported position history, portfolio importance and verified filing changes from public SEC disclosures.
At a glance
The full verified relationship, including prior ownership episodes and exits where supported.
Pershing Square Capital Management first reported Microsoft in Q1 2026. The reported position was increased across later filings. Pershing Square Capital Management currently reports 6.21M shares. The latest verified filing showed: Bought 9.8% more.
Position over time
See the same verified relationship through reported shares, portfolio weight or reported value.
Gaps indicate periods that cannot be safely connected or where a verified corporate action changes the raw share scale. Stock price, when available, is market context and not a transaction price.
What changed
Latest filing plus the most meaningful reported changes. Unchanged quarters are collapsed by default.
Filing context
Quarter-end price $373.02 · Estimated holding basis $370.42
Filing context
Quarter-end price $370.17 · Estimated holding basis $370.17
How important is Microsoft in Pershing Square Capital Management’s reported portfolio?
Relative importance is measured only within the verified primary non-option reported portfolio for each quarter.
Who else owns Microsoft?
Also reported by 8 other tracked investors in their latest verified filings.
SEC filing evidence
Market context and filing-derived values are kept separate from actual transaction prices, which 13F filings do not disclose.
Market context only; not an investor transaction price.
Derived from validated reported value and shares where supported.
Calculated from supported filing history.
This tracker follows Pershing Square Capital Management’s Form 13F disclosures. It is not Bill Ackman’s personal brokerage account, and 13F filings do not reveal exact trade dates or execution prices.