Alexander Caedmon Karp (born October 2, 1967) is an American billionaire businessman and entrepreneur. He is the co-founder and CEO of the software firm Palantir Technologies.
Karp earned his J.D. degree from Stanford Law School and a doctorate in social theory from Goethe University Frankfurt. He subsequently worked in finance, founding the investment firm Caedmon Group, where he managed money for clients including wealthy European investors and invested in start-up companies and stocks. At Stanford, he met Peter Thiel and in 2003, they alongside three others co-founded Palantir.
In 2025, his net worth exceeded $18 billion, making him among the wealthiest 200 people in the world as reported by Forbes and the Bloomberg Billionaires Index, and Time magazine named him on the Time 100 list of the world's most influential people of that year.
Alexander Caedmon Karp was born on October 2, 1967 in New York City, the eldest son of Robert Joseph Karp, a Jewish clinical pediatrician, and Leah Jaynes Karp, an African American artist. He grew up with his younger brother, Oliver "Ben" Karp, in Philadelphia.
Like his father, Karp attended Central High School in Philadelphia, graduating in 1985. He said he struggled with dyslexia from an early age. He was influenced by his parents' activism for civil rights and social justice during his youth and went to many protests. He said what he inherited from his maternal side was "a strong affinity to fighting discrimination". Karp stated that "some black people considered me black while some did not", and said, "I view me as me. And I'm very honored to be honored by all groups that will have me." Karp's recent ancestry on the paternal side of the family is from Germany. He said that before he went to Germany, he had underestimated how German his upbringing had been.
Karp initially wanted to be a social theorist. He earned a bachelor's degree in philosophy from Haverford College in Haverford, Pennsylvania, in 1989, then enrolled at Stanford Law School, where he earned a J.D. in 1992. While at Stanford, Karp met Peter Thiel. The two bonded over their exasperation with the law school and a passion for political debates. Thiel recalled that, "He was more the socialist, I was more the capitalist. He was always talking about Marxist theories of alienated labor and how this was true of all the people around us." Karp said that he felt different at "every institution I interacted with".
After his undergraduate studies and law school, Karp earned a Ph.D. in neoclassical social theory from Goethe University Frankfurt, Germany, in 2002. Thiel was the only one who supported his decision to pursue a doctorate at Frankfurt. His doctoral thesis was titled "Aggression in der Lebenswelt: Die Erweiterung des Parsonsschen Konzepts der Aggression durch die Beschreibung des Zusammenhangs von Jargon, Aggression und Kultur" (Aggression in the Lifeworld: The Extension of Parsons' Concept of Aggression by Describing the Connection Between Jargon, Aggression, and Culture). Karola Brede told him he could write the thesis in English, but he replied that it was important to him that he could write it in German. He lived in Frankfurt from the mid-1990s to 2001 and considered staying permanently, but ultimately decided to go back to the U.S. for work.
Karp began a career as a research associate at the Sigmund Freud Institute in Frankfurt. He received an inheritance of $12,000 from his paternal grandfather, with which he founded London-based money management firm Caedmon Group. After he gained some successes with the stock market, some European high-net-worth individuals invested in his company. Karp later claimed that his goal at the time was to amass $250,000 to return to Berlin to read and write as a dilettante, though he failed to explain how it was possible to build "a London-based money management firm" attracting "high net-worth investors" with $12,000.
For some time, he helped Thiel to gather funding for Clarium Capital. In 2004, along with Thiel and others, Karp co-founded Palantir Technologies, becoming its CEO.
The New York Times ranked Karp the highest-paid CEO of a publicly traded company in 2020, the year the company went public, with compensation worth $1.1 billion. In 2024, he was the highest-paid CEO of a publicly traded company in the United States, with a "compensation actually paid" of almost $6.8 billion. The Economist chose Karp, a former director of the publication, as the 2024 CEO of the Year.. He is also co-managing director at Frankfurt-based Palantir Technologies Gmbh, and sits on the board of Palantir Technologies UK Ltd.
According to Steinberger, Karp had no previous technical or business training, but his background in philosophy helped with understanding ethical or political concerns. Karp criticizes companies like Google and Facebook for their attitude to data protection. Facebook became the foil against which Palantir defined its identity; when Palantir expanded in Palo Alto and took over a former Facebook office, they painted over a famous wall associated with Facebook. Among Palantir leadership, there were differences in philosophy, with Thiel complaining about Karp always choosing the hard, complex way when a more straightforward path might have sufficed. Despite this, Thiel largely left the operation of the company in Karp's hands.
In 2024, Karp was 1143rd on the Forbes annual World's Billionaires List with a net worth of $2.9 billion. In 2025 his net worth at times exceeded $18 billion, ranking him among the 200 wealthiest people in the world on the Forbes Real-Time Billionaires List and the Bloomberg Billionaires Index.
Axel Springer SE, member of the board of directors (2018–2020) and shareholders committee (2022–2025)
BASF, member of the board of directors (until 2020)
The Economist Group, former member of the board of directors
Thiel initiated the idea of the company RoboteX, which was built in 2007 and headed by their Palantir co-founder Nathan Gettings. It provided robots for police, firefighters and SWAT teams. Thiel and Karp also served on the board as directors and investors.
He is a frequent participant of the Reagan National Defense forum, which is an annual gathering of "generals, military strategists, and defense industrial companies", now also open to the technology side, as shown in the participation of Karp and Jeff Bezos. At the 2023 edition of the forum, he stated that "Somehow the corporate elite of this country thinks when it’s time to make money, you stand up, and when it’s time to stand up, you go play golf. And we’ve got to change that. That’s our fault".
The 2025 documentary Watching You: The World of Palantir and Alex Karp explores the political and business network that Karp has built in Germany. He helps build connections between American and German politicians through transatlantic organizations such as the Atlantik-Brücke.