Lazaros Karageorgiou

Lazaros Karageorgiou is a Greek competitive-programming and mathematics olympiad athlete from Thessaloniki who represented Greece at the International Olympiad in Informatics (IOI) in 2024, 2025 and 2026, earning an Honourable Mention in 2025 (Sucre, Bolivia) and a Bronze medal in 2026 (Tashkent, Uzbekistan). A long-time member of Greece's national informatics teams, he also medalled repeatedly at the European Junior Olympiad in Informatics (EJOI) and Junior Balkan Olympiad in Informatics (JBOI), and won 1st place in Greece's Panhellenic Informatics Competition in 2024 and 2025. Beyond informatics he is a Bronze medallist at the 67th International Mathematical Olympiad (IMO 2026) and a member of Greece's national team for the 43rd Balkan Mathematical Olympiad (2026). In April 2026 he was accepted to Caltech with an $88,835 annual scholarship; he attended Mandoulides Schools in Thessaloniki on scholarship.

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• Accepted to Caltech (April 2026) with an $88,835 annual scholarship; a 3rd Grade Senior High School student at Mandoulides Schools, where he has studied on scholarship since junior high.Apr 17, 2026
• Accepted to Caltech (April 2026) with an $88,835 annual scholarship; studied at Mandoulides Schools on scholarship since junior high and completed its Studies Abroad Program, so his trajectory is elite-school-to-top-US-university.Apr 17, 2026
• Accepted to Caltech (April 2026) with an $88,835 annual scholarship; studied at Mandoulides Schools on scholarship since junior high and completed its Studies Abroad Program, an elite-school-to-top-US-university trajectory.Apr 17, 2026
• Represented Greece at IOI across three consecutive years (2024, 2025, 2026), progressing from participant to Honourable Mention (2025) to Bronze (2026) - a clear upward trajectory.Aug 2026
• IOI progression 2024 (participant) -> 2025 (Honourable Mention, 229.30 pts) -> 2026 (Bronze, 233.80 pts) shows three straight years on Greece's national team with steadily improving scores, making him one of Greece's strongest informatics students of his cohort.Aug 2026
• Deep dual-discipline profile: aside from informatics he is a two-time Panhellenic Informatics 1st-place winner and a national-team mathematician (IMO 2026 Bronze, BMO 2026 team) - a polymath Olympiad record rather than a single-subject specialist.Apr 16, 2026
• Dual-discipline polymath: beyond informatics he is a two-time Panhellenic Informatics 1st-place winner and a national-team mathematician (IMO 2026 Bronze, BMO 2026 team), a rare combined record.Apr 16, 2026
• Scored a perfect 2000/2000 in Greece's 2025 national informatics selection camp (Athens, NTUA, May 5-9, 2025), which is why he was chosen for both IOI 2025 and the Balkan Olympiad in Informatics 2025.May 20, 2025
• Scored a perfect 2000/2000 in Greece's 2025 national informatics selection camp (Athens, NTUA, May 5-9, 2025), earning selection for both IOI 2025 and the Balkan Olympiad in Informatics 2025.May 20, 2025
• In April 2026 he was also reported accepted to the University of Cambridge, giving him two elite admissions (Caltech and Cambridge) before final school-leaving exams.Jan 29, 2026
• In early 2026 he was also reported accepted to the University of Cambridge, giving him two elite admissions (Caltech and Cambridge) before school-leaving exams - some ambiguity as to which he will attend.Jan 29, 2026
• Long junior record before IOI: EJOI 2022 Silver and 2023 Bronze, JBOI 2022 Bronze and 2023 Silver, BOI 2023 Honourable Mention - six years of continuous international olympiad participation.May 20, 2025