Demitroff, Kellner, Barrett

Demitroff to head Derivix sales

Derivix, a New York-based options and analytics software developer, has named John Demitroff managing director and head of sales.

Demitroff has more than 20 years' industry experience. Prior to his appointment at Derivix, he served as managing director overseeing derivatives business sales at Tradeweb. Demitroff has also held institutional sales positions on Wall Street.

Kellner replaces Plunkett at Instinet

Instinet has appointed Jonathan Kellner as president of

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