New York
The headquarters, and where most mandates open. North American coverage across capital markets, advisory and pre-IPO.
Contact · New York · London
Every mandate begins with one conversation.
Whether you are weighing a sale, pursuing an acquisition, or seeking access to what lists next — a partner will speak with you personally, and in confidence.
Get in touch
Tell us what you are considering.
Nothing leaves this room. No process begins until you decide it should.
Reach a partner, not a desk.
Direct
One address serves both offices, and the reply comes from the partner who would run the work.
- info@onyxcps.com — the one address for every inquiry, in either office.
- Direct line
- We do not publish partner numbers. Write first and a call is arranged, not queued.
- Hours
- New York and London business hours. A message sent overnight is read in the other office first.
- Response
- Within two business days, from a partner.
Where we are
Two financial capitals,
one desk.
London
The European desk. Same partners, same file — a transaction does not change hands when it crosses the Atlantic.
Before you write
The questions that come before a mandate.
Four we are asked first, answered here — so the first conversation can start somewhere further on.
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Who do you work with?
Public and private companies weighing a decision that touches capital, and qualified investors seeking access to late-stage positions. Founder- and family-owned businesses are the core of the practice.
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Is an initial conversation confidential?
Yes, and it stays that way. Nothing you tell us is circulated, shopped or indexed, and no process begins until you decide it should.
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What does it cost to sell with us?
On a sell-side mandate, nothing. There is no engagement fee and no success commission, and the terms are set out in writing, in full, before any work begins.
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How quickly will I hear back?
A partner replies within two business days, from New York or London. The reply is an answer to what you asked, not a pitch.