Disclosure research

What Is Bill Ackman Buying Next?

A Form 13F is a periodic record of certain U.S. equity holdings. It is published after the reporting period, so it is a historical disclosure, not a live view of a manager’s portfolio or intentions.

Prior Moves organizes public filings and publishes model-ranked expectations for later disclosures. The expectation is not confirmation that Pershing Square has bought a security, and a rank is not a calibrated probability or a forecast of investment returns.

Read each evidence type separately

Disclosed holdings

Positions transcribed from a public filing, with the filing period and source shown on the investor page.

Model-ranked expectations

Candidate names ordered for a later filing. The list remains unconfirmed until the relevant disclosure is published and graded.

Historical evaluation

Ranking tests and portfolio simulations use different populations and answer different questions. Neither establishes future returns.

Explore the source record

• Bill Ackman’s investor page for disclosed holdings, current ranked expectations and filing context.
• The methodology for evaluation populations and metric definitions.
• The graded record for timestamped calls and historical portfolio simulations, shown separately.

Prior Moves is a research publication. It does not place trades, manage assets or provide individualized investment advice. Past results do not predict future performance.