John Craig Venter (October 14, 1946 – April 29, 2026) was an American scientist, businessman, and researcher who studied the human genome. He helped create the first map of human DNA and led the first team to introduce a man-made chromosome into a cell. Venter founded Celera Genomics, the Institute for Genomic Research (TIGR), and the J. Craig Venter Institute (JCVI). He also co-founded Human Longevity Inc. and Synthetic Genomics.

Venter was listed on Time magazine's 2007 and 2008 Time 100 lists, which named the most influential people in the world. In 2010, the British magazine New Statesman ranked him 14th on its list of "The World's 50 Most Influential Figures 2010." In 2012, he received the Dan David Prize for his work in genome research. He was elected to the American Philosophical Society in 2013 and served on the advisory board of the USA Science and Engineering Festival.

Early life and education

John Craig Venter was born on October 14, 1946, in Salt Lake City, Utah, to Elisabeth and John Venter. His family moved to Millbrae, California, during his childhood. As a young person, he did not focus on his schoolwork and preferred spending time on the water, such as in boats or surfing. In his book A Life Decoded, he wrote that he was not a focused student and received Cs and Ds on his eighth-grade report cards.

Venter believed his behavior during his teenage years was linked to attention deficit hyperactivity disorder (ADHD). Later, he discovered genetic markers connected to ADHD in his own DNA. He graduated from Mills High School. His father died suddenly at age 59 due to a heart attack, which made him think about his own mortality. He once said, "If you want immortality, do something meaningful with your life."

Venter opposed the Vietnam War but joined the United States Navy to avoid being drafted. He trained as a medic and worked as a hospital corpsman in the intensive-care unit of a field hospital in Vietnam from 1967 to 1968. He felt overwhelmed by the events of the Tet Offensive and tried to commit suicide by swimming into the ocean but changed his mind and returned to shore. Caring for injured soldiers inspired him to study medicine.

He began his college education in 1969 at College of San Mateo in California. Later, he transferred to the University of California, San Diego, where he studied under biochemist Nathan O. Kaplan. He earned a Bachelor of Science degree in biochemistry in 1972 and a Ph.D. in physiology and pharmacology in 1975 from UCSD.

Career

After working as an associate professor and later as a full professor at the State University of New York at Buffalo, he joined the National Institutes of Health (NIH) in 1984.

While working at the NIH, Venter learned how to identify mRNA and studied how it is expressed in the human brain. He discovered short cDNA sequence fragments using automated DNA sequencing and named them expressed sequence tags, or ESTs. The NIH Office of Technology Transfer decided to file a patent on the ESTs Venter discovered, which included genes identified through studies of mRNA expression in the human brain. When Venter shared the NIH's strategy during a Congressional hearing, it caused a lot of controversy. The NIH later stopped the effort and canceled the patent applications due to public concern.

Venter believed that genomics could greatly change healthcare. He thought whole genome shotgun sequencing was the fastest and most effective way to get useful human genome data. However, the Human Genome Project rejected this method because some scientists felt it was not accurate enough for the human genome, would be harder to manage, and would cost more money.

Venter saw the slow progress of the Human Genome Project as a chance to try his shotgun sequencing method to speed up human genome sequencing. He sought funding from private companies to start Celera Genomics. The company planned to make money by selling genomic data to users for a fee. This goal pushed the public genome program to work harder to complete the full sequence. Venter and his team at Celera Genomics shared credit for sequencing the first draft of the human genome with the publicly funded Human Genome Project.

In 2000, Venter and Francis Collins of the National Institutes of Health and the U.S. Public Genome Project announced the mapping of the human genome, three years earlier than expected. The announcement was made with U.S. President Bill Clinton and UK Prime Minister Tony Blair. Venter and Collins shared an award for "Biography of the Year" from A&E Network. On February 15, 2001, the Human Genome Project published the first human genome in the journal Nature, followed the next day by a Celera publication in Science. Despite some claims that shotgun sequencing was less accurate than the method used by the Human Genome Project, the technique became widely accepted by scientists.

Venter was fired by Celera in early 2002. According to his biography, he was fired because of a conflict with the main investor, Tony White, who wanted to attend a White House ceremony celebrating the achievement of sequencing the human genome. White was not allowed to attend, which weakened Celera's claims. White wanted to turn Celera into a pharmaceutical company, but Venter had no interest in that business and no experience in it.

The Global Ocean Sampling Expedition (GOS) is an ocean exploration project that studies the genetic diversity of marine microbes and their role in natural processes. It began as a pilot project in the Sargasso Sea in August 2003. Venter announced the full Expedition on March 4, 2004. The project used his personal yacht, Sorcerer II, and started in Halifax, Canada. It traveled around the world and returned to the U.S. in January 2006.

In June 2005, Venter co-founded Synthetic Genomics, a company focused on using modified microorganisms to create clean fuels and chemicals. In July 2009, ExxonMobil partnered with Synthetic Genomics for $600 million to research next-generation biofuels. Venter continued to work on developing engineered microalgae for biofuel production.

Venter sought a patent for the first partially synthetic species, possibly named Mycoplasma laboratorium. Some scientists believe this research could lead to bacteria designed to produce fuels, medicines, or help fight global warming.

In May 2010, a team led by Venter successfully created what was called "synthetic life." They made a long DNA molecule containing a complete bacterial genome and inserted it into another cell. This was similar to the work of Eckard Wimmer's group, who created an RNA virus. The new organism had four "watermarks" in its DNA to identify it as synthetic.

On March 25, 2016, Venter reported the creation of Syn 3.0, a synthetic genome with the fewest genes of any freely living organism (473 genes). The goal was to remove all nonessential genes, leaving only those needed for life. This simplified cell is expected to help researchers.

In August 2018, Venter retired as chairman of the board of the J. Craig Venter Institute (JCVI), saying he wanted to focus on his research. He remained a scientific adviser to the board.

In 2006, Venter founded the J. Craig Venter Institute, a nonprofit that studies synthetic biology. It has facilities in La Jolla and Rockville, Maryland, and employs over 200 people.

In April 2022, Venter sold the La Jolla JCVI facility to the University of California, San Diego, for $25 million. He continued to lead a separate nonprofit research group called the J. Craig Venter Institute and emphasized he was not retiring. The institute

Published books

Venter wrote three books. His first book is an autobiography titled A Life Decoded. In his second book, Life at the Speed of Light, he shared his idea that this generation is the time when two separate areas of science—computer programming and DNA sequencing—are beginning to come together. Futurist Ray Kurzweil supported this idea. Venter’s most recent book, written with David Ewing Duncan, is titled The Voyage of Sorcerer II: The Expedition that Unlocked the Secrets of the Ocean's Microbiome. This book describes the Global Ocean Sampling Expedition, which took place over 15 years and involved collecting and studying DNA from tiny ocean organisms around the world.

Personal life

James Venter was married to Barbara Rae-Venter for 12 years. They had a son named Christopher. After their marriage ended, he married Claire M. Fraser and stayed married to her until 2005. In late 2008, he married Heather Kowalski. They lived in the La Jolla neighborhood of San Diego, California. James Venter was an atheist.

In 2022, when he was 75 years old, he sold his main research building to the University of California, San Diego, for $25 million. The institute needed more space, and in May 2025, it was announced that it would move to a new facility in downtown San Diego. The Venter Institute campus in Rockville, Maryland, also expanded during this time. In 2022, he stated he had no plans to retire. In addition to his home in La Jolla, he owned a ranch in Borrego Springs, California, and had homes in two small towns in Maine. He enjoyed sailing and flying a Cirrus SR22 T plane, which he called "the ultimate freedom."

James Venter died in San Diego, California, on April 29, 2026, at the age of 79. He had been hospitalized because of the side effects from treatment for a recently diagnosed cancer.

Legacy

J. Craig Venter is known by his colleagues as an innovator and independent thinker in the field of genetic sequencing. He developed the shotgun sequencing method, which made DNA sequencing faster and less expensive. Even though he joined the Human Genome Project later, he worked quickly with companies to draw public attention to the project and share its results freely, helping medical research advance. Venter is also recognized as an early leader in synthetic biology, a field he explored through his research institute.

His work has been covered in several magazines, including Wired, The Economist, Cosmos, and The Atlantic. A 2001 NOVA special titled "Cracking the Code of Life" focused on his contributions. In 2008, Time magazine listed him in its "Top 10 Everything" article. That same year, his research on creating the genetic code for a new type of bacteria by combining 582,000 base pairs was named number three in Time's "Top 10 Scientific Discoveries."