All medalists.
IMO & IOI, including honourable mentions.
KVKari VilonenFinlandIMO1973 · 1974Competition recordBronze medalIndexed profileKVKari VisalaFinlandIOI1995Competition recordSilver medalKTKar-Keung ToHong KongIMO1991 · 1992Competition recordBronze medal · Silver medalKAKarl Antony TomlinsonNew ZealandIMO1989Competition recordHonourable mentionKYKarla Yisel Ramírez GarcellCubaIMO2023 · 2024Competition recordHonourable mentionIndexed profileKEKarl Erik HolterNorwayIMO2009 · 2010 · 2011Competition recordHonourable mentionKGKarl GrillAustriaIMO1975 · 1976 · 1977Technische Universität WienAssociate ProfessorIndexed profileKTKarl-Heinz TetschGerman Democratic RepublicIMO1962Competition recordSilver medalKGKārlis GaņģisLatviaIOI2003EvolutionFrontend ArchitectIndexed profile
Kārlis ŠustersLatviaIOI2019 · 2020Jane StreetFPGA EngineerAutumn profileKMKarl Michael GöschkaAustriaIMO1985Competition recordBronze medalKRKarl RuppAustriaIMO2002SerwasPV GmbHFounderIndexed profileKCKarn ChutinanUnited States of AmericaIMO2025Competition recordGold medalKSKarn SakulsakThailandIOI1993THiNKNET Co., Ltd.Chief Principal EngineerIndexed profileKCKarol CwalinaPolandIOI2001 · 2002北京市通州区私立树人学校Indexed profileKCKarol CwalinaPolandIMO2001北京市通州区私立树人学校Indexed profileKDKarol DanutamaIndonesiaIOI2007DatasaurVice President Of EngineeringIndexed profileKFKarol FarbiśPolandIOI2012GoogleSoftware EngineerIndexed profile
Karolis GreblikasLithuaniaIOI2011 · 2012 · 2013Citadel SecuritiesQuantitative DeveloperAutumn profileKKKarol KaszubaPolandIMO2012 · 2014Competition recordBronze medal · Gold medalKKKarol KonaszyńskiPolandIMO2009GoogleSenior Software EngineerAutumn profileKŻKarol ŻebrowskiPolandIMO2008University of WarsawPhD in computer and information sciences (cryptography)Autumn profileKSKarsten SperlingGermanyIOI1996 · 1997 · 1998Competition recordSilver medal · Gold medalIndexed profileKKKarst KoymansNetherlandsIMO1975Competition recordBronze medalKNKartal NagyHungaryIMO2016Competition recordSilver medalKAKartik A. PrasannaIndiaIMO1992 · 1993University of MichiganProfessorIndexed profile
Kartikesh MishraNepalIMO2019Lamina LabsCo-Founder & CTOAutumn profile
Ka Shu WongAustraliaIOI1999Jump Trading LLCSoftware EngineerAutumn profileKHKaspar Holm DaugaardDenmarkIOI1996 · 1997Google DeepMindSoftware EngineerIndexed profileKDKasper DupontDenmarkIMO1997Competition recordBronze medalKDKasper DupontDenmarkIOI1996 · 1997Competition recordSilver medal · Gold medalIndexed profileKJKasper JohanssonSwedenIMO2025Competition recordBronze medalKKKasper KristensenDenmarkIOI1997DTU AquaStatisticianIndexed profileKKKasper K.S. AndersenDenmarkIMO1991Competition recordHonourable mentionKAKasra AhmadiIslamic Republic of IranIMO2008Competition recordGold medalKAKasra AlishahiIslamic Republic of IranIMO1998Sharif University of TechnologyAssistant ProfessorIndexed profileKEKasra Edalatnejad KhameneIranIOI2011Competition recordSilver medal
Kasra MazaheriIranIOI2019 · 2020CitadelQuantitative ResearcherAutumn profileKRKasra RafieIslamic Republic of IranIMO1992Competition recordSilver medalKMKassym MukhanbetiyarKazakhstanIMO2019Competition recordBronze medalIndexed profileKGKatalin GyarmatiHungaryIMO1996Competition recordBronze medalKGKatarina GriljSloveniaIMO2022 · 2023Competition recordHonourable mentionKQKatarína QuittnerováSlovakiaIMO1999 · 2000 · 2001 · 2002Competition recordBronze medal · Silver medalKMKateryna MatviivUkraineIMO2013Competition recordHonourable mentionAutumn profileKMKatherine Mary ChristieUnited KingdomIMO1989Competition recordHonourable mentionKMKatherine McCutcheonIrelandIMO2008Competition recordHonourable mentionKIKati IherEstoniaIMO2018Competition recordHonourable mentionKMKati MetsaluEstoniaIMO1994Competition recordHonourable mentionKOKatsuki OtaJapanIOI2024 · 2025Competition recordGold medalKTKatsuki TezukaJapanIMO1995Competition recordBronze medalKAKaur Aare SaarEstoniaIMO2011 · 2012 · 2013Pactum AIProcurement Solutions LeadIndexed profileKMKaustav MishraIndiaIMO2022University of WarsawResearch InternIndexed profileKNKaustubh NamjoshiIndiaIMO1992 · 1993Competition recordSilver medalKPKaustubh P. DeshmukhIndiaIMO1996Competition recordSilver medalKWKa Wing NgHong KongIMO2000Competition recordBronze medalKVKayacan VesekTürkiyeIOI2015MetaSoftware EngineerIndexed profileKUKayra UygunTürkiyeIMO2017Capula Investment Management LLPQuantitative StrategistAutumn profileKYKa Yu TamHong KongIMO2010 · 2011Competition recordSilver medal · Bronze medalKHKazi Hasan ZubaerBangladeshIMO2010 · 2011GoogleSoftware Engineer IIIIndexed profileKBKazım BüyükbodukTürkiyeIMO1998Competition recordSilver medal
Kārlis ŠustersLatviaIOI2019 · 2020Jane StreetFPGA EngineerAutumn profileKMKarl Michael GöschkaAustriaIMO1985Competition recordBronze medalKRKarl RuppAustriaIMO2002SerwasPV GmbHFounderIndexed profileKCKarn ChutinanUnited States of AmericaIMO2025Competition recordGold medalKSKarn SakulsakThailandIOI1993THiNKNET Co., Ltd.Chief Principal EngineerIndexed profileKCKarol CwalinaPolandIOI2001 · 2002北京市通州区私立树人学校Indexed profileKCKarol CwalinaPolandIMO2001北京市通州区私立树人学校Indexed profileKDKarol DanutamaIndonesiaIOI2007DatasaurVice President Of EngineeringIndexed profileKFKarol FarbiśPolandIOI2012GoogleSoftware EngineerIndexed profileKarolis GreblikasLithuaniaIOI2011 · 2012 · 2013Citadel SecuritiesQuantitative DeveloperAutumn profileKKKarol KaszubaPolandIMO2012 · 2014Competition recordBronze medal · Gold medalKKKarol KonaszyńskiPolandIMO2009GoogleSenior Software EngineerAutumn profileKŻKarol ŻebrowskiPolandIMO2008University of WarsawPhD in computer and information sciences (cryptography)Autumn profileKSKarsten SperlingGermanyIOI1996 · 1997 · 1998Competition recordSilver medal · Gold medalIndexed profileKKKarst KoymansNetherlandsIMO1975Competition recordBronze medalKNKartal NagyHungaryIMO2016Competition recordSilver medalKAKartik A. PrasannaIndiaIMO1992 · 1993University of MichiganProfessorIndexed profileKartikesh MishraNepalIMO2019Lamina LabsCo-Founder & CTOAutumn profileKa Shu WongAustraliaIOI1999Jump Trading LLCSoftware EngineerAutumn profileKHKaspar Holm DaugaardDenmarkIOI1996 · 1997Google DeepMindSoftware EngineerIndexed profileKDKasper DupontDenmarkIMO1997Competition recordBronze medalKDKasper DupontDenmarkIOI1996 · 1997Competition recordSilver medal · Gold medalIndexed profileKJKasper JohanssonSwedenIMO2025Competition recordBronze medalKKKasper KristensenDenmarkIOI1997DTU AquaStatisticianIndexed profileKKKasper K.S. AndersenDenmarkIMO1991Competition recordHonourable mentionKAKasra AhmadiIslamic Republic of IranIMO2008Competition recordGold medalKAKasra AlishahiIslamic Republic of IranIMO1998Sharif University of TechnologyAssistant ProfessorIndexed profileKEKasra Edalatnejad KhameneIranIOI2011Competition recordSilver medalKasra MazaheriIranIOI2019 · 2020CitadelQuantitative ResearcherAutumn profileKRKasra RafieIslamic Republic of IranIMO1992Competition recordSilver medalKMKassym MukhanbetiyarKazakhstanIMO2019Competition recordBronze medalIndexed profileKGKatalin GyarmatiHungaryIMO1996Competition recordBronze medalKGKatarina GriljSloveniaIMO2022 · 2023Competition recordHonourable mentionKQKatarína QuittnerováSlovakiaIMO1999 · 2000 · 2001 · 2002Competition recordBronze medal · Silver medalKMKateryna MatviivUkraineIMO2013Competition recordHonourable mentionAutumn profileKMKatherine Mary ChristieUnited KingdomIMO1989Competition recordHonourable mentionKMKatherine McCutcheonIrelandIMO2008Competition recordHonourable mentionKIKati IherEstoniaIMO2018Competition recordHonourable mentionKMKati MetsaluEstoniaIMO1994Competition recordHonourable mentionKOKatsuki OtaJapanIOI2024 · 2025Competition recordGold medalKTKatsuki TezukaJapanIMO1995Competition recordBronze medalKAKaur Aare SaarEstoniaIMO2011 · 2012 · 2013Pactum AIProcurement Solutions LeadIndexed profileKMKaustav MishraIndiaIMO2022University of WarsawResearch InternIndexed profileKNKaustubh NamjoshiIndiaIMO1992 · 1993Competition recordSilver medalKPKaustubh P. DeshmukhIndiaIMO1996Competition recordSilver medalKWKa Wing NgHong KongIMO2000Competition recordBronze medalKVKayacan VesekTürkiyeIOI2015MetaSoftware EngineerIndexed profileKUKayra UygunTürkiyeIMO2017Capula Investment Management LLPQuantitative StrategistAutumn profileKYKa Yu TamHong KongIMO2010 · 2011Competition recordSilver medal · Bronze medalKHKazi Hasan ZubaerBangladeshIMO2010 · 2011GoogleSoftware Engineer IIIIndexed profileKBKazım BüyükbodukTürkiyeIMO1998Competition recordSilver medal