Kevin Spacey as Sam Rogers, Head of Sales and Trading Demi Moore as Sarah Robertson, Chief Risk Management Officer Jeremy Irons as John Tuld, CEO and Chairman of the Board Paul Bettany as Will Emerson, Head of Trading Stanley Tucci as Eric Dale, Former Head of Risk Management Zachary Quinto as Peter Sullivan, Senior Risk Analyst Simon Baker as Jared Cohen, Head of Capital Markets Penn Badgley as Seth Bregman, Junior Risk Analyst Aasif Mandvi as Ramesh Shah Mary McDonnell as Mary Rogers Ashley Williams as Heather Burke Susan Blackwell as Lauren Bratberg Al Sapienza as Louis Carmelo Maria Dizzia as Executive Assistant Peter Y. Kim as Timothy Singh Oberon K.A. Adjepong as Coffee Guy