Revenue filings tell you what a business earned in a period that closed, in many cases, more than a year before the accounts reached the public register. For most analytical purposes, that historical view is serviceable. For identifying M&A readiness, it is often the wrong question answered too late.
The timing problem is not incidental. A UK private company with a December year-end has nine months after that year-end to file its accounts at Companies House. That filing then enters the public record in September of the following year. The revenue figure in that document describes trading conditions that may no longer reflect the business at all. If management turnover, a pricing reset, or a contract win transformed the company's economics in the intervening period, you are making judgements based on stale information.
Hiring data operates on a different clock. A job advertisement posted this week reflects a decision made in this quarter. The volume and pattern of hiring activity, viewed across a rolling six-month window, tells you something about the business's current intentions and near-term direction. That is what makes it a more useful leading indicator for M&A readiness than revenue trends extracted from filed accounts.
The Filing Regime Limits What Revenue Data Is Available
It is worth being precise about the constraints of the UK accounts filing regime for private companies, because they are more limiting than many analysts realise.
Small companies under the Companies Act 2006 definition (turnover below ten million pounds, balance sheet below five million pounds, fewer than fifty employees) may file abbreviated accounts that contain no profit and loss statement. Micro-entities are permitted to file even less. The result is that a significant portion of the private company mid-market files only a balance sheet.
This means that for a substantial sub-set of the companies most relevant to a UK PE or corporate development team, there is no public revenue figure at all. What exists is a balance sheet that records fixed assets, debtors, creditors, and equity. This data has analytical value, but it is not a revenue signal and it cannot tell you anything about growth trajectory over the past twelve months.
Hiring data is not subject to these constraints. Any company that posts roles externally creates a public, timestamped record of its hiring activity. The granularity of function, seniority, and timing is available regardless of the company's filing regime.
The Readiness Signal: Three Functions, One Window
Not all hiring patterns indicate M&A readiness. A company adding ten production operatives in January is responding to an order book. A company adding a VP Sales alongside a Senior Financial Controller and an HR Business Partner within the same six-month window is doing something structurally different.
The combination we track is accelerated hiring across these three functions, appearing within a concentrated window. Each role has a distinct logic in the context of preparing a business for transaction.
A new VP Sales or Business Development Director, hired ahead of a formal process, is often brought in to build or accelerate a growth narrative. Buyers pay for demonstrable trajectory. Hiring a senior commercial leader twelve to eighteen months before a process gives management time to show results. The appointment is a future-facing investment in the story the business will tell.
A Senior Financial Controller or Head of FP&A is hired when management accounts need to become substantially more rigorous. The financial reporting standards expected by an institutional investor are materially different from what most owner-managed businesses maintain. Building that internal capability in advance of external scrutiny is a sensible preparation, and it is a distinct appointment from hiring for operational finance capacity.
An HR Business Partner or People Director is brought in when employment documentation, bonus structures, and organisational design need to be brought into a state that will survive legal diligence. This is not routine HR management. It is infrastructure preparation for an external review process.
When all three functions appear within a six-month period at a company that has not previously had these roles at this seniority level, the pattern is a strong leading indicator of approaching readiness.
A Practical Illustration
Consider a UK specialist maintenance contracting business in the Midlands, approximately ninety employees, operating in process equipment servicing. In the autumn of 2024, the company posts a VP Business Development role in September, a Senior Finance Manager in October, and an HR Manager in November. Their most recent filed accounts, for the year ended March 2023, show revenue growth of around eleven percent. Those accounts were filed in December 2023.
On the revenue filing alone, the company is one of many growing industrials in its sub-segment. Nothing distinguishes it from several dozen similar businesses in the sector. On the hiring pattern, it has triggered the three-function signal across a ten-week window. For a deal team building a contact programme in that sector, this is the company worth calling in Q1 2025, before any formal process commences.
This is a synthetic illustration. The structural pattern it describes is not.
The Lead Time Property
The most operationally useful property of the hiring signal is its lead time relative to formal process commencement. If a business enters a formal sale process in Q3 2026, the advisory mandate and information memorandum preparation typically begins in Q4 2025 or early Q1 2026. The management infrastructure changes that support that preparation often precede it by six to twelve months. Hiring for those roles precedes the changes by a further few months.
A deal team monitoring hiring signals on a rolling basis in its target sectors will often identify preparatory hiring twelve to eighteen months ahead of formal process launch. That lead time creates the window for a proprietary conversation before competitive intermediaries are involved and before the company appears on any mainstream coverage list.
The contrast with revenue filings is stark. By the time a strong revenue trend appears in a filed account and a deal team acts on it, the company has often already been identified by competitors working from the same data. The hiring signal is earlier, less commonly monitored, and more predictive of near-term activity.
What This Signal Does Not Tell You
The hiring signal is a prioritisation input, not a readiness confirmation. There are false positives. A company scaling rapidly will hire across sales, finance, and HR simply because it is growing. A professional management team installed following a founder succession will produce an identical pattern without any exit intent. We normalise against sector growth rates and weight the signal relative to the company's existing headcount profile to reduce noise, but it is not a deterministic indicator.
Coverage is also imperfect. Hiring signals are visible only where companies advertise externally. Owner-managed businesses that hire through personal networks are underrepresented. That said, businesses preparing for an institutional transaction tend to advertise more broadly than businesses that are not, because the roles they need often require credentials and domain expertise that informal referral networks cannot reliably provide.
We are not suggesting that hiring signals replace financial analysis in any substantive process. By the time a deal team is conducting proper diligence, the financials are the primary document set. What the hiring signal does is determine which companies to prioritise approaching before a process starts, and which to watch over the coming year.
How Thema Incorporates This
Within Thema's sector map output, hiring velocity is one of four evidence signals attached to each target company. The others are filing activity patterns (change of auditor, director appointments, group restructuring filings), estimated revenue band, and sector sub-segment position. A company scoring highly on hiring velocity but showing flat filing activity receives a different ranking than one where both signals appear simultaneously.
Within the hiring velocity dimension, we distinguish between the functional composition of open roles and the acceleration of volume. A company adding ten production staff is not the same signal as a company adding a small number of senior commercial, financial, and people roles for the first time. That distinction is built into the weighting. The companies that appear near the top of a Thema sector map are those whose hiring and filing signals together suggest an approaching inflection point, not the largest or fastest-growing companies by revenue alone.