Who Is Sigurdur Thordarson? Age, Biography and Wiki
Born on October 12, 1992, Sigurdur Thordarson is a notable Icelandic hacker, informant, and criminal whose life has been characterized by both controversy and intrigue. By 2025, Sigurdur will be 33 years old. His early exposure to the world of hacking and cybersecurity has positioned him as a significant figure in discussions surrounding Internet privacy, ethical hacking, and information leaks. His most recognized association is with the hacktivist group Anonymous, where he contributed to various high-profile cyber operations.
| Occupation | Criminal |
|---|---|
| Date of Birth | October 12, 1992 |
| Age | 33 Years |
| Birth Place | N/A |
| Horoscope | Libra |
| Country |
Popularity
Sigurdur Thordarson's Popularity over time
Height, Weight & Measurements
As of 2025, Sigurdur Thordarson's height is approximately 6 feet (183 cm), and he weighs around 160 pounds (72 kg). With a slim build, his body measurements remain unknown; however, he is often seen sporting a casual yet stylish look that reflects his tech-savvy personality.
Family, Dating & Relationship Status
In terms of family, Sigurdur keeps his private life under wraps, and not much is publicly known. As for his relationship status, he has been linked to various partners over the years. However, the current status of his love life is uncertain as he tends to maintain a low profile in this aspect. There are no confirmed reports of a boyfriend or girlfriend, leaving fans curious about the romantic side of this enigmatic figure.
Thordarson began working for WikiLeaks as early as February 2010 and was fired in November 2011. In a few weeks, Thordarson was in Assange's inner circle.
According to one former volunteer, "the perception was that Siggi basically got to a level where Julian trusted him in a matter of days." Birgitta Jónsdóttir, a former WikiLeaks volunteer and member of the Icelandic parliament who worked on Collateral Murder, described Julian Assange's relationship with Thordarson as like "Batman and Robin." Seve
ral of WikiLeaks' core volunteers said that Siggi was a dangerous liability, prone to indiscretions and lies and Jonsdottir warned Assange not to trust Thordarson.
Assange told others not trust or talk to Thordarson, but continued working with Thordarson. According to Daniel Domscheit-Berg, "it all implied Julian was using him. These are all kinds of games children get into."
Net Worth and Salary
As of 2025, Sigurdur Thordarson's net worth is estimated to be around $1 million. His earnings stem from various sources, including speaking engagements, consultations related to cybersecurity, and his online presence. While he may not have amassed wealth like some other celebrities, his insights and expertise in cybersecurity have undoubtedly provided him with a comfortable lifestyle.
In 2012, WikiLeaks filed criminal charges against Thordarson for embezzlement. Thordarson denied the charges and the case was later dismissed. He was later arrested in the summer of 2013 on charges of financial fraud. At that time, the WikiLeaks case was brought back up, and Thordarson was indicted on charges of embezzlement and financial fraud.
In 2014, Thordarson was ordered to pay WikiLeaks 7 million ISK (roughly $55,000) as well as being sentenced to prison for 2 years for embezzlement and financial fraud. Thordarson pled guilty to all counts.
In those cases Thordarson was ordered to pay the victims 15 million ISK (roughly $115.000), Thordarson received a two-year prison sentence in those cases.
Career, Business and Investments
Throughout his career, Sigurdur Thordarson has been involved in several high-profile hacking incidents and acted as an informant for law enforcement agencies. His unique perspective on cybersecurity has led him to become a sought-after consultant and speaker at various tech conferences. In addition to his career in hacking and consulting, he has been involved in tech-related investments, with a keen interest in startups that focus on enhancing online security and privacy measures.
In 2010, at the age of 17, he was arrested for stealing and leaking classified information about Icelandic financial companies. After his arrest, Kristinn Hrafnsson introduced him to Julian Assange, the editor and founder of WikiLeaks, and he worked as a volunteer for the organization between 2010 and 2011.
In 2011, Thordarson contacted the FBI and offered to become an informant, turning over numerous internal WikiLeaks documents and hard drives in the process. WikiLeaks accused him of having embezzled $50,000 from the WikiLeaks online store to which he pleaded guilty along with other economic crimes against other entities.
He was also accused of using Julian Assange's name in legal documents.
Social Network
Sigurdur Thordarson is active on multiple social media platforms, where he shares insights into cybersecurity, technology, and his personal life. He uses platforms like Twitter and Instagram to engage with his audience, providing tips and updates on current trends in the tech world. His online presence has garnered him a considerable following, further amplifying his influence in the digital landscape.
In June 2021, in an interview with Icelandic newspaper Stundin, Thordarson admitted that he had fabricated testimony he made against Julian Assange in the case in which the US sought Assange's extradition from the UK.
Thordarson was a key witness whose testimony was crucial to the US case, according to numerous news organisations, including the German public broadcaster Deutsche Welle, The Hill, Der Spiegel and The Intercept. The Washington Post disagreed, writing that Thordarson's testimony was not part of the core allegations.
Education
While information about his formal education remains scarce, it is known that Sigurdur has a strong self-taught background in computer science and hacking techniques. His early interest in technology propelled him toward becoming a significant figure in the cybersecurity community. Continuous learning through online courses and practical experience further solidified his expertise in this ever-evolving field.
Thordarson grew up middle-class in Reykjavik with a younger sister. He began hacking at age 12 and joined WikiLeaks in February 2010 when he was 17 years old and in high school. He went to university to study computer science and psychology, but says he was suspended for hacking.
