Citadel remembers the kind and devoted engineer who helped build its quant team
Citadel is among those paying respects this week to Amit Marathe, an engineer who spent nearly two decades working for the firm and who has passed away in his early 50s.
Writing on LinkedIn, friends and colleagues said Marathe combined humility, wisdom and generosity to the extent that he even donated a kidney to a total stranger. He always had perfect grades but "never carried any air about his intelligence of his generosity," said one former member of his computer science class at university. Amit had a brilliant mind, and a kind heart, he added. His generosity was legendary.
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Marathe worked at Citadel twice: once between 2006 and 2015 and again between 2018 and October 2025. Both times, he was based in Chicago. In the intervening years, he briefly became the director of AI and machine learning at Google.
A spokesman for Citadel said: “Amit was an early member of the 10-person team that founded Citadel GQS [Global Quantitative Strategies]. He was a tireless and devoted engineer, and immensely generous—from helping colleagues develop and manage the platform to the warmth and hospitality he shared with many of us outside of the office. He will be deeply missed by all who knew him."
Jeffrey Ryan a top quant who worked with Marathe at Citadel in the early days of GQS said he was a great man, with a quiet voice who "seemed to know everything about everything."
"Thanks Amit, you will be missed," Ryan added.
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