# Ex-Brevan Howard Trader Sued by Quant Who Joined His New Fund

> Ex-Brevan Howard trader Robert Sicari sued by former colleague who joined his new fund.
- Title: Ex-Brevan Howard Trader Sued by Quant Who Joined His New Fund
- Summary: Ex-Brevan Howard trader Robert Sicari sued by former colleague who joined his new fund. Former Brevan Howard quant Wooyoung Hong claims ex-portfolio manager…
- Keywords: wooyoung hong, robert sicari, brevan howard, thirty park capital, quantitative researcher, trading profits, funds, news, india, Ex-Brevan, Howard, Trader
- Source: mint — https://livemint.com/companies/exbrevan-howard-trader-sued-by-quant-who-joined-his-new-fund-11792609344534.html
- Published: 2026-10-21T19:02:24+00:00
- Read time: 1 min
- Topics: wooyoung hong, robert sicari, brevan howard, thirty park capital, quantitative researcher, trading profits, funds, news, india
## Ex-Brevan Howard trader sued
Ex-Brevan Howard portfolio manager Robert Sicari accused of withholding millions in promised trading profits from former colleague.

> Ex-Brevan Howard trader Robert Sicari was accused of withholding millions of dollars in promised trading profits from a former colleague who joined his new fund
## Former colleague joined new fund
Wooyoung Hong, ex-quantitative researcher at Brevan Howard, joined Sicari's ThirtyPark Capital after both were fired in 2024.

> Wooyoung Hong, who worked under Sicari at Brevan Howard as a quantitative researcher, said in a complaint filed Tuesday in New York that they were both fired from that firm in 2024
## Promised profit share
Hong claims Sicari promised 50% of gains from trades and a 30% stake in ThirtyPark Capital.

> Hong claims Sicari promised to pay him 50% of the gains from certain trades and give him a 30% stake in ThirtyPark
## Claimed $3.5 million owed
Hong estimates $3.5 million for trades handled from November 2024 to December 2025.

> Hong estimates that he’s entitled to as much as $3.5 million for trades he handled from November 2024 to December 2025
## Sicari changed terms
Sicari proposed $400,000 cash payment and 30% profit share vesting over time in January.

> he proposed that Hong instead accept a $400,000 cash payment and a 30% profit share that would vest over time
## Hong paid $20,000
Hong received only $20,000 for his year of work at ThirtyPark Capital.

> Hong says he was only paid $20,000 for his year of work at ThirtyPark
## Case filed in New York
Hong v Sicari case filed in New York State Supreme Court, New York County.

> The case is Hong v Sicari, New York State Supreme Court, New York County
## Key takeaway

Former Brevan Howard quant Wooyoung Hong claims ex-portfolio manager Robert Sicari withheld $3.5 million in promised trading profits from his new fund.