Ryan Primmer replaces Darren Mast as the newly renamed KCG’s Global Head of Fixed Income, Foreign Exchange and Commodities.

While these kind of leadership changes are not unusual following an acquisition — especially when it is the merger of similar companies — there has nevertheless been somewhat of a revolving door in the management suite of Hotspot FX [Editor’s note: see clarification comment below], since its parent Knight Capital agreed to a merger with rival Getco.

The newly merged Getco and Knight Capital, renamed KCG, has announced that Ryan Primmer will head KCG’s foreign exchange business, as well as its fixed income and commodities units, beginning August 16. He replaces Darren Mast, Getco’s former COO, who was named as interim head of Hotspot FX just several months ago, in February.

Primmer is actually an outside hire, coming neither from Getco nor Knight Capital. He joins KCG from UBS, where most recently he acted as Global Head of Equities Trading.

For the full KCG press release announcing the management changes click here.

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