Biography.guide
Home › People › Computer scientist › Robert Mercer
Portrait of Robert Mercer

Robert Mercer

b. 1946

American computer scientist and businessman

Don't just read it — keep itBiographies to ownE-book · Audio · Video From $7 →

About Robert Mercer

Born 1946. Robert Mercer is an American computer scientist, banker, entrepreneur and hedge fund manager.

Robert Leroy Mercer (born July 11, 1946)

Mercer played a controversial role in the campaign for the United Kingdom to leave the European Union, led by Dominic Cummings, with £3.9 million being spent on his data analytics and machine learning company AggregateIQ. He has also been a major funder of organizations supporting right-wing political causes in the United States, such as Breitbart News, and Donald Trump's 2016 campaign for president. He is the principal benefactor of the Make America Number 1 super PAC.

In November 2017, Mercer announced he would step down from Renaissance Technologies and sell his stake in Breitbart News to his daughters. He was the majority owner of SCL Group, a self-described "global elections management agency", before it was dissolved in 2018.

Early life and education Mercer grew up in New Mexico. He developed an early interest in computers and in 1964 attended a National Youth Science Camp in West Virginia where he learned to program a donated IBM computer. He also worked on IBM alignment models. In June 2014, Mercer received the Association for Computational Linguistics Lifetime Achievement Award for this work.

In 1993, Mercer joined hedge fund Renaissance Technologies after being recruited by executive Nick Patterson. Mercer and a former colleague from IBM, Peter Brown, became co-CEOs of Renaissance when Simons retired in 2009.

In 2014, a bipartisan Senate panel estimated that Medallion investors underpaid their taxes by some $6.8 billion over more than a decade, by masking short-term gains as long-term returns. In 2014, Renaissance managed $25 billion in assets.

Mercer appears in the Paradise Papers as a director of eight Bermuda companies, some of which appear to have been used to legally avoid US taxes.

Political activities and views

In 2015, The Washington Post called Mercer one of the ten most influential billionaires in politics. Since 2006, Mercer has donated about $34.9 million to Republican political campaigns in the US.

Mercer has given $750,000 to the Club for Growth, $2 million to American Crossroads, and $2.5 million to Freedom Partners Action Fund. In 2010, he financially supported fringe biochemist Art Robinson's unsuccessful efforts to unseat Peter DeFazio in Oregon's 4th congressional district. In the 2013-2014 election cycle, Mercer donated the fourth largest amount of money among individual donors and the second most among Republican donors.

Mercer has donated to The Heritage Foundation, the Cato Institute, the Media Research Center, Reclaim New York, GAI, and Citizens for Self-Governance. In 2013, Mercer was shown data by former Jimmy Carter pollster Patrick Caddell, who has been critical of top Democrats, and commissioned more research from Caddell that showed "voters were becoming alienated from both political parties and mainstream candidates". He gave at least $10 million to the media outlet, according to Newsweek.

In 2015 Mercer also gave $400,000 to Black Americans for a Better Future, a conservative think tank led by Raynard Jackson. Since 2017 Mercer has donated $87,100 to the same Super PAC.

Brexit Mercer was an activist in the campaign for the United Kingdom to end its membership of the European Union, also known as Brexit. Andy Wigmore, communications director of Leave.EU, said that Mercer donated the services of data analytics firm Cambridge Analytica to Nigel Farage, the head of the United Kingdom Independence Party (UKIP). The firm was able to advise Leave.EU through its ability to harvest data from people's Facebook profiles in order to target them with individualized persuasive messages to vote for Brexit.

2016 U.S. election Mercer was one of the biggest donors in the 2016 U.S. elections, donating $22.5 million to Republican candidates and PACs. contributing $11 million to a super PAC associated with the candidate. Mercer was a major supporter of Donald Trump's 2016 campaign for president. Rebekah worked with Conway on the Cruz Super-PAC Keep the Promise in the 2016 Republican primaries.

JD Vance Mercer's family donated an undisclosed amount to the super PAC Protect Ohio Values which was established to support JD Vance for his 2022 election to a Senate seat in Ohio.

Race relations Mercer has said that the Civil Rights Act of 1964, the landmark federal statute arising from the civil rights movement of the 1960s, was a major mistake. In 2017, David Magerman, a former Renaissance employee, alleged in a lawsuit that Mercer had said that African Americans were economically better off before the civil rights movement, that white racists no longer existed in the United States, and that the only racists remaining were black racists.

Personal life Mercer and his wife Diana Lynne Dean have three daughters: Jennifer ("Jenji"), Rebekah ("Bekah"), and Heather Sue. Rebekah runs the Mercer Family Foundation. The three Mercer daughters formerly owned a bakery called Ruby et Violette.

Mercer plays competitive poker and owns an HO scale model railroad.

Mercer lives at "Owl's Nest" mansion in Head of the Harbor, New York. The most recent one is 203 feet (62 metres) in length, and has a pirate-themed playroom for Mercer's grandchildren and a chandelier of Venetian glass.

In Florida, Mercer built a large stable and horse riding center. He has acquired one of the country's largest collections of machine guns and historical firearms, including a weapon Arnold Schwarzenegger wielded in The Terminator. The lawsuit was settled, according to a lawyer who represented the staff members.

Biography shop

Don’t just read it —
keep it.

Full-length biographies made to live with: read them, listen on the way to work, watch them tonight.

  • E-book
  • Audio
  • Video
Browse the shop — from $7

Instant download · yours to keep · every purchase keeps this site free

Important facts

Birth century
Nationality
Education
University of New Mexico, University of Illinois Urbana-Champaign, Sandia High School, Doctor of Philosophy
Employers
Renaissance Technologies, IBM Research
Awards
ACL Fellow
Also known as
Robert Leroy Mercer, Robert L. Mercer, R.L. Mercer, Bob Mercer, R. Mercer

Family & relationships

Child
Rebekah Mercer

People in Robert Mercer's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Robert Mercer's

Frequently asked questions

Who is Robert Mercer?

American computer scientist and businessman

When was Robert Mercer born?

Robert Mercer was born on 11 July 1946 in Santa Clara.

What is Robert Mercer's occupation?

Robert Mercer is a computer scientist, banker, entrepreneur and hedge fund manager.

What nationality is Robert Mercer?

Robert Mercer is American.

Sources & further reading

· Wikipedia: Robert Mercer

· Wikidata: Q16732492

· DBpedia: Robert Mercer

Cite this page

APA: Biography.guide. (2026). Robert Mercer. https://biography.guide/robert-mercer/

MLA: "Robert Mercer." Biography.guide, https://biography.guide/robert-mercer/.

Chicago: "Robert Mercer." Biography.guide. https://biography.guide/robert-mercer/.

Data last updated: 2026-09-20 · Spot an error? Report a correction.

Page generated 2026-09-27 05:29 UTC