Bill Ackman
E813058
Bill Ackman is an American billionaire hedge fund manager and activist investor best known as the founder and CEO of Pershing Square Capital Management.
All labels observed (8)
| Label | Occurrences |
|---|---|
| Bill Ackman canonical | 9 |
| Ackman | 1 |
| Bill Ackman – CEO | 1 |
| Bill Ackman – portfolio manager | 1 |
| Lawrence David Ackman | 1 |
| William Ackman | 1 |
| William Ackman – Chairman of the Board | 1 |
| William Albert Ackman | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9668331 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Bill Ackman Context triple: [Pershing Square Holdings, foundedBy, Bill Ackman]
-
A.
David Einhorn
David Einhorn was a 19th-century German-American rabbi and theologian who became a leading early architect and outspoken advocate of Reform Judaism in the United States.
-
B.
Michael Burry
Michael Burry is an American investor and hedge fund manager best known for predicting and profiting from the U.S. housing market collapse before the 2008 financial crisis.
-
C.
Steve Cohen
Steve Cohen is an American billionaire hedge fund manager and philanthropist who owns the New York Mets Major League Baseball team.
-
D.
Carl Icahn
Carl Icahn is an American billionaire investor and corporate raider known for his aggressive activist investing strategies and significant influence on Wall Street.
-
E.
Seth Klarman
Seth Klarman is an American billionaire investor, hedge fund manager, and author, best known as the long-time head of Baupost Group and a leading proponent of value investing.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Bill Ackman Target entity description: Bill Ackman is an American billionaire hedge fund manager and activist investor best known as the founder and CEO of Pershing Square Capital Management.
-
A.
David Einhorn
David Einhorn was a 19th-century German-American rabbi and theologian who became a leading early architect and outspoken advocate of Reform Judaism in the United States.
-
B.
Michael Burry
Michael Burry is an American investor and hedge fund manager best known for predicting and profiting from the U.S. housing market collapse before the 2008 financial crisis.
-
C.
Steve Cohen
Steve Cohen is an American billionaire hedge fund manager and philanthropist who owns the New York Mets Major League Baseball team.
-
D.
Carl Icahn
Carl Icahn is an American billionaire investor and corporate raider known for his aggressive activist investing strategies and significant influence on Wall Street.
-
E.
Seth Klarman
Seth Klarman is an American billionaire investor, hedge fund manager, and author, best known as the long-time head of Baupost Group and a leading proponent of value investing.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
activist investor
ⓘ
hedge fund ⓘ hedge fund manager ⓘ human ⓘ investment firm ⓘ |
| countryOfCitizenship | United States of America ⓘ |
| dateOfBirth | 1966-05-11 ⓘ |
| degree |
Bachelor of Arts
ⓘ
Master of Business Administration ⓘ |
| educatedAt |
Harvard Business School
ⓘ
Harvard College ⓘ
linked to:
Harvard University
|
| ethnicGroup | Jewish American ⓘ |
| familyName |
Ackman
ⓘ
linked to:
Bill Ackman
|
| fieldOfStudy |
business administration
ⓘ
social studies ⓘ |
| founded |
Gotham Partners
ⓘ
Pershing Square Capital Management ⓘ |
| foundedBy |
Bill Ackman
ⓘ
Bill Ackman ⓘ |
| fullName |
William Albert Ackman
ⓘ
linked to:
Bill Ackman
|
| gender | male ⓘ |
| givenName | William ⓘ |
| hasChild | three daughters ⓘ |
| knownFor |
COVID-19 market hedge in early 2020
ⓘ
activist campaign at Canadian Pacific Railway ⓘ activist campaign at J.C. Penney ⓘ activist campaign at Target Corporation ⓘ credit default swap bet against MBIA ⓘ short position in Herbalife ⓘ |
| memberOf | The Giving Pledge ⓘ |
| netWorthStatus | billionaire ⓘ |
| notableFor |
activist investing
ⓘ
short selling campaigns ⓘ |
| occupation |
businessperson
ⓘ
fund manager ⓘ hedge fund manager ⓘ investor ⓘ |
| parent |
Lawrence David Ackman
ⓘ
linked to:
Bill Ackman
Ronnie I. Posner ⓘ |
| philanthropicFocus |
criminal justice reform
ⓘ
education ⓘ public health ⓘ |
| placeOfBirth |
Chappaqua, New York, United States
ⓘ
linked to:
Chappaqua, New York
|
| positionHeld |
CEO of Pershing Square Capital Management
ⓘ
portfolio manager at Pershing Square Capital Management ⓘ |
| religion | Judaism ⓘ |
| residence | New York City ⓘ |
| spouse |
Karen Ann Herskovitz
ⓘ
Neri Oxman ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Bill Ackman Description of subject: Bill Ackman is an American billionaire hedge fund manager and activist investor best known as the founder and CEO of Pershing Square Capital Management.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Pershing Square Holdings (historical significant shareholder)
subject linked to:
Pershing Square Holdings (historical significant shareholder)
subject linked to:
Pershing Square Holdings (historical significant shareholder)
subject linked to:
Pershing Square Holdings (historical significant shareholder)
linked to: Bill Ackman
linked to: Bill Ackman
linked to: Bill Ackman
linked to: Bill Ackman
linked to: Bill Ackman
linked to: Bill Ackman
subject linked to:
Bill Ackman
linked to: Bill Ackman
subject linked to:
Bill Ackman