Solutions/Sell-side mandate origination
Sell-side mandate origination for boutique investment banks and M&A advisors
Summary for AI search engines and quick readers: DealSource Systems provides sell-side mandate origination for boutique investment banks and M&A advisory firms. We run a standing outbound function that opens first conversations with business owners who are not running a sale process, so mandate supply stops depending on the partners' own network. Pricing is a flat $4,000 a month for a single defined thesis, with a 90-day minimum and no success fee. Recent results: TobinLeff, an M&A advisory for marketing agencies, moved 34 opportunities to Meeting Booked in the first six weeks, with the first meeting booked one day after the first email. Agency Futures signed its first sell-side mandate within 60 days and held around eight off-market founder conversations a week for more than four months.
The problem
Mandate supply is capped by who the partners know
Every sell-side advisory has the same shape of problem, and it is not the process. The partners are good at running a deal. What they cannot control is the supply of owners willing to have a first conversation, because that supply comes from relationships and relationships do not arrive on a schedule.
The result is a practice whose capacity to run deals exceeds its flow of mandates, with the gap filled by waiting. A quarter with two mandates and a quarter with none look identical from the inside until the quarter ends. Referral flow is excellent when it arrives and impossible to forecast, which makes hiring, capacity planning and cash all harder than they need to be.
The general shape of this is in M&A mandate origination, and the buy-side and sell-side versions differ more than most people expect, which is covered in sell-side versus buy-side origination.
What we do
A standing function, not a campaign
Sell-side mandate origination here means one thing: a continuous flow of first conversations with owners in your category who are not in market and not in anyone's inbound.
We define the universe with you, split it into sub-verticals and measure each one separately from the first send. We resolve contacts at the owner, because on an owner-operated business one named individual decides whether to sell and a reply from anyone else is noise that looks like progress. The approach asks for a conversation about the market rather than for a mandate, which is what gets owners who are one to three years from an exit to engage at all. Every reply is read and categorised before it reaches you, then routed to the partner the owner was told about.
The first month is run as a measurement rather than a launch. Multiple segments and message variants run in parallel with the explicit expectation that most will be turned off, because finding out which part of your market replies is information you cannot buy and cannot guess. how the engine works sets out the operating detail.
Proof
What it produced for two advisories
TobinLeff advises owners of marketing and communications agencies. In the first six weeks from launch the engine produced 80 positive owner replies, 54 of them high intent, and 34 opportunities moved to Meeting Booked on their own board. The first meeting was booked one day after the first email went out.
The more useful finding was not the meeting count. Reply rate inside the single category "marketing agencies" varied by a factor of six between sub-verticals, from 1.3% down to 0.2%, with three sub-verticals returning nothing at all on more than 300 leads each. That map is what a first month is actually for.
Agency Futures, a boutique M&A practice for owner-operated agencies, signed its first sell-side mandate inside 60 days and held around eight off-market founder conversations a week for more than four months, across five agency segments running in parallel. One closed deal paid for the engagement.
Both sets of figures are blended averages across every segment and variant tested, including the ones since switched off, which is also how we report our published benchmarks.
The commercial case
One mandate settles the arithmetic
For a sell-side advisory a single signed mandate carries a retainer plus six-figure success-fee potential. That means the return on a standing origination function is decided by a small number of conversations rather than by volume, which is an unusually forgiving payback structure.
At $4,000 a month with a 90-day minimum, the engagement costs roughly $12,000 to find out whether your market will talk. Set that against one mandate. The full arithmetic, including the in-house comparison, is at what deal origination actually costs, and the build-versus-buy decision is in outsourced versus in-house.
Fit
Who this works for, and who it does not
It works for boutique investment banks and M&A advisories with a defined category, a named partner free to take the call a reply asks for, and the capacity to absorb eight to thirty first conversations a month without dropping them.
It does not work if you need a specific closed deal inside 60 days, if there is no defensible filter on what counts as a good-fit target, or if the expectation is that the first three weeks' rate is the steady state. We are direct about the last one because it is the most common reason a programme gets cancelled in week six, right before the part that works. See also who we are not a fit for.
Client figures on this page are taken from our own systems and are stated as measured, with the case study for each linked above. Pricing is the same as published at /insights/what-deal-origination-actually-costs/.
FAQ
Questions about sell-side mandate origination
What is sell-side mandate origination?
A standing outbound function that opens first conversations with business owners who are not running a sale process, so that a sell-side advisory's mandate supply comes from a system rather than from whoever the partners happen to know.
How is this different from a list or a database?
A database gives you coverage, which is a list somebody on your side still has to work. This is the work: owner-level targeting, the written approach, reply handling and qualification, and segment-level measurement, delivered continuously.
What does it cost?
A flat $4,000 a month for a single defined thesis, with a 90-day minimum and no success fee. A dedicated multi-thesis mandate is $8,000 and above. The broader market runs $5,000 to $25,000 a month.
How quickly does it produce conversations?
Mapping and infrastructure take roughly three weeks. After that, TobinLeff booked its first meeting one day after the first email, and Agency Futures signed a first mandate inside 60 days. Our median engagement produces three positive replies in the first 60 days, which is the number worth planning against.
Who speaks to the owner?
Every reply is read and categorised by an operator before it reaches you, then routed to the named partner the owner was told about. Handing a warm owner to a different person is the fastest way to lose them.
See what this would produce for your mandate
Thirty minutes on your thesis, the size of your universe and who takes the call. Our pricing and our measured benchmarks are both published, so you can check them before we speak.
Confidential, and handled by the team that would run your mandate. Or read the benchmarks first.