•
Marisa Abela as Yasmin Kara-Hanani, an ambitious graduate from a wealthy background, initially assigned to the Foreign Exchange Sales (FX) desk at Pierpoint •
Priyanga Burford as Sara Dhadwal (series 1), the President of Pierpoint London •
Mark Dexter as Hilary Wyndham (series 1–2, 4), managing director (MD) of FX at Pierpoint •
David Jonsson as Augustus "Gus" Sackey (series 1–2), an openly gay graduate of at
Eton and
Oxford, initially assigned to the Investment Banking Division (IBD) desk at Pierpoint, then the CPS desk •
Harry Lawtey as Robert Spearing (series 1–3), •
Freya Mavor as Daria Greenock (series 1; guest series 2–3), a VP at the CPS desk at Pierpoint and Harper's line manager •
Derek Riddell as Clement Cowan (series 1), CPS VP and Robert's manager, who struggles with heroin addiction •
Nabhaan Rizwan as Hari Dhar (series 1), a graduate of a state school from an
Urdu-speaking immigrant family, assigned to the IBD desk at Pierpoint •
Will Tudor as Theo Tuck (series 1), a
closeted Eton graduate and second-year research analyst for Pierpoint •
Ken Leung as Eric Tao, the fiery CPS MD at Pierpoint who takes Harper under his wing •
Sarah Parish as Nicole Craig (series 1–3), a Pierpoint client who is sexually inappropriate with Harper and Robert •
Andrew Buchan as Felim Bichan (series 1–2), a fund manager and Pierpoint's biggest client •
Amir El-Masry as Usman Abboud (series 1), assistant to Kaspar Zenden, Clement's main client •
Sagar Radia as Rishi Ramdani (series 2–present; recurring series 1), an associate and
market maker on the CPS desk, known for his colorful commentary on the trading floor •
Caoilfhionn Dunne as Jackie Walsh (series 2; recurring series 1; guest series 3), a VP on the FX desk •
Nicholas Bishop as Maxim Alonso (series 2–3; recurring series 1), Yasmin's family friend and one of Pierpoint's potential clients •
Alex Alomar Akpobome as Daniel Van Deventer, aka "DVD" (series 2), the executive director from Pierpoint New York who becomes involved with Harper • Sonny Poon Tip as Leo Bloom (series 2), graduate trader on the CPS desk •
Kit Harington as Sir Henry Muck (series 3–present), •
Kal Penn as Jonah Atterbury (series 4), the irresponsible CEO and co-founder of Tender •
Amy James-Kelly as Jennifer Bevan (series 4), a newly promoted
Labour Party Minister of State for Industry •
Pip Torrens as Kevin Rawle (season 4), the editor of
The Patriot, a right-leaning tabloid owned by Norton ==Episodes==