Composite case
This autopsy is a composite. It reflects patterns SLAM sees repeatedly across commercial due diligence, assembled from multiple engagements and observable market dynamics. It is not any single company, and any resemblance to a specific business is coincidental.
The Setup
The Business
Vertical B2B SaaS. Compliance workflow software for mid-market financial-services firms.
The Numbers
£18M ARR, growing 40% year on year for three consecutive years.
The Deal
Acquired by a mid-market PE firm for £95M, a little over 5x ARR.
The Thesis
Double the sales team over 24 months. Accelerate growth from 40% to 55%.
The investment case was a scale play, not a turnaround. The business was healthy, growing, and led by a sales organisation everyone agreed was excellent. The plan was simply to pour more fuel into an engine that was already running. Eight new account executives over four quarters, and the growth rate would climb. Nothing about the thesis was unreasonable on the evidence presented. That is precisely why it is worth examining.
What Diligence Saw
Commercial diligence looked at the metrics that usually indicate a healthy sales organisation, and every one of them came back reassuring.
3.4x
Pipeline coverage against the forward number
Read as healthy
118%
Net revenue retention
Read as strong
85%+
Team-level quota attainment, consistent by quarter
Read as reliable
2
Star account executives, described as the best in the business
Read as a strength
The CRM was clean. Fields were populated, stages were current, close dates were plausible. The management team was confident and articulate. On the standard diligence checklist, this was a business that passed. Each of these numbers was accurate. Not one of them was the thing that mattered.
The Unravelling
Deal closes. Growth plan approved.
Eight new account executives to be hired over four quarters. The financial model has each one productive ninety days after joining.
One of the two star performers resigns.
Unsettled by the ownership change, she leaves. Her £4.2M of annual net new contribution has no successor and no documented method behind it.
First cohort of four new hires onboarded.
The model expects them at full productivity by Month 7, on the inherited ninety-day ramp assumption.
New hires are not closing. Managers step in.
Rather than diagnose what the new hires are doing wrong, managers join the calls and close the deals themselves. Pipeline still looks healthy, because the management tier is quietly propping it up.
Q3 board review. Attainment still reported near 80%.
The number holds, but net new ARR has stalled. What looks like team performance is manager heroics. Nobody names this in the room.
The second star performer burns out.
Carrying an impossible load, his output drops. The managers, already stretched closing deals for the new hires, have no capacity left to absorb the gap.
The ramp gap becomes undeniable.
Hires who are ten months in are producing at roughly 30% of the modelled rate. Year 1 net new ARR lands around £6M below plan.
Growth has decelerated from 40% to 22%. The thesis is abandoned.
The firm writes down the investment and shifts from a scale plan to a hold-and-fix. The value creation the multiple was paid for never executed.
The Diagnosis
Nothing in the timeline was bad luck. Three distinct failure modes were present at the point of acquisition, invisible to a metrics-led diligence, and they compounded. Individually, any one of them was survivable. Together they were fatal to the thesis.
Two account executives generated close to 60% of net new ARR. The framing of them as the best in the business concealed what they actually were: a concentration risk. Their success was personal, not institutional. It lived in their relationships and their instincts, not in any documented method the business could transfer. When the first one left, there was nothing to replace her with.
The management tier had been promoted for individual selling, never for coaching. So when the new hires struggled, the managers did the only thing they knew how to do: they closed the deals themselves. This masked the ramp failure for two full quarters, and it guaranteed the new hires never became self-sufficient, because nobody was diagnosing and developing them. The tier that was supposed to build the new team was structurally incapable of it.
The ninety-day ramp in the financial model was inherited convention, never once tested against the company's own hiring history. The real median time to genuine productivity was closer to nine months, and that was for hires who received proper coaching. These hires did not receive it. The Year 1 revenue model was built on an assumption that was false before the deal closed.
Why It Compounded
Read separately, these are three problems. Read together, they are one mechanism. Hero Dependency created the revenue gap the moment a star left. Ramp Fiction meant the plan to fill that gap was already running years behind reality. And the Co-Signing management tier was precisely the part of the organisation that could not close either gap, because it had never learned to build a seller. The thesis assumed headcount would convert into revenue. Every one of the three reasons it would not was present, and invisible, on the day the deal was signed.
The Cost
−£6M
Year 1 net new ARR against plan
40% → 22%
Growth rate deceleration inside 18 months
Written down
Investment marked below entry; scale thesis abandoned
18 months
From close to the plan being formally shelved
What a Behavioural Diligence Would Have Caught
None of this required privileged access. Each of the three failure modes leaves a signature that a behavioural commercial diligence tests for as standard, using data the business already holds.
Pareto Test
A distribution of individual ARR contribution over the last eight quarters would have shown the 60% concentration in two people, and flagged the departure risk that a metrics-led read celebrated as a strength.
Coaching Test
Asking each frontline manager to name the specific operational gap of their weakest rep, and the intervention they were running for it, would have revealed a management tier that could compile numbers but could not develop a seller.
Cohort Test
A ramp analysis built from the company's own hiring history, rather than the ninety-day convention, would have exposed the true nine-month ramp and blown a visible hole in the Year 1 model before the multiple was agreed.
The thesis was not undone by hidden information. It was undone by information nobody thought to look for, because the surface metrics were reassuring enough that no one looked underneath them.