Capital markets
Access to the public markets, for companies already in them.
Investment banking & advisory
New York · London
Capital markets and advisory, across the full structure.
From follow-on offerings and private placements to restructuring, fairness opinions and M&A — ONYX advises public and private companies wherever the decision touches capital.
Our perspective
Most mandates begin as a question, not yet a transaction.
Raise, sell, refinance, restructure — or wait. We are engaged to answer that first, and only then to execute the alternative that survives the analysis. The structure follows the decision, never the other way around.
What we do
Two desks,
one mandate.
Corporate & strategic
The decision before the instrument, and the execution after it.
Who we work with
Capital on one side,
a company on the other.
ONYX stands in the middle and is engaged from either end of the same transaction — by the board that is raising or selling, and by the investors, lenders and acquirers on the other side of it.
Issuer · owner · board
- Raising capital
- Exploring a sale
- Weighing the alternatives
Equity · credit · strategic
- Institutional investors
- Lenders and fixed income
- Corporate acquirers
We underwrite the business,
not the exit multiple.
How we invest
Where the answer is a shareholder rather than an advisor, ONYX takes the position itself — and holds it in years, not quarters.
- Control transactions
- Majority positions in profitable, privately held companies.
- Buy-and-build
- A platform first, then the add-ons that compound on it.
- Growth capital
- Minority capital, without the owner ceding control.
- Co-investment
- Alongside the firm, on the same terms.
What we cover
Sectors we advise.
Technology & Software
Healthcare & Life Sciences
Industrials
Business Services
Consumer & Retail
Energy & Infrastructure
By the numbers
A record built on outcomes.
$15B+
Committed capital across the buyer and investor network
300+
Transactions guided by the partners to date
20+
Years of relationships behind the network
2
Offices — New York & London
0%
No fee. No commission. One hundred percent of the agreed proceeds reach the seller.
Engagement terms are set out in writing, in full, before any work begins.
How we work
Four phases,
one mandate.
-
Mandate & alternatives
We answer whether to act before we decide how.
-
Structure & positioning
The instrument is chosen last, once the objective is fixed.
-
Negotiation & diligence
Competing interest is managed, not collected.
-
Close & beyond
Through completion and into a clean handover.
Why ONYX
Built around the mandate,
not the product.
- Confidential by design
- Need-to-know throughout. Origination happens quietly, never through an open process.
- A network on both sides
- Direct relationships with acquirers, private equity platforms, family offices and late-stage investors.
- Product-neutral advice
- We are not selling one instrument, so the recommendation follows the objective.
- Senior throughout
- One partner-led team in New York and London, from the first conversation to the close. No handoffs.
Start the conversation
Raising, selling, or weighing
the alternatives?
Whether the answer is a raise, a sale, a refinancing or none of the three, a partner will speak with you personally, and in confidence.
Investing rather than transacting? ONYX opens late-stage pre-IPO positions to qualified investors.