Why boring small-caps are often the best ones to own

There is a quiet corner of the small-cap market that rarely makes the front page of investment magazines. No lithium dream, no gene-therapy breakthrough, no AI narrative compressed into a ticker. Just a company that makes something useful, sells it to people who reliably want more of it, and does that year after year without drawing much attention. These are the small-caps most private investors overlook, and they are very often the ones that quietly produce the best long-term returns.

The cultural bias is easy to understand. Exploration juniors promise multiples. Clinical-stage biotechs promise transformation. Tech small-caps promise a slice of the future. An industrial company that makes specialist components for aerospace suppliers, or a regional consumer goods firm with a dominant niche, promises none of those things. It promises orders, margins and cash. The trouble with promises of multiples is that most of them never arrive. The trouble with orders, margins and cash is that they tend to compound in ways that can surprise you over a decade.

The UK market has produced the single clearest example of this dynamic in the modern era. Games Workshop is a company that sells plastic miniatures and the paint, brushes and rulebooks required to play with them. For years on AIM it was treated as a novelty. Institutional investors were sceptical of the addressable market. Retail investors who bought the product as teenagers rarely made the connection to the equity. The company quietly built a global hobby community, raised prices steadily, kept inventory tight, and reinvested in its own factory in Nottingham. The share price did nothing remarkable for long stretches, then produced one of the best returns on the whole of AIM over a fifteen-year window. There was no moment of discovery that could be traced to a single announcement. The market simply caught up, slowly and then all at once, with what the accounts had been saying for years.

The investor lesson from Games Workshop is not that every niche hobby business becomes a compounder. It is that durable small-cap returns usually come from companies where the financial reality runs ahead of the narrative for long enough that you have time to buy in at reasonable prices. Boring companies give you that window. Exciting companies rarely do.

When looking at industrial and manufacturing small-caps, there are a handful of numbers that tell you far more than the headline revenue line. Return on capital employed, usually shortened to ROCE, is the one to start with. It tells you how much operating profit the business generates for every pound of capital tied up in the machinery, premises and working capital needed to run it. A consistent ROCE above the mid-teens, sustained through a full economic cycle, is a strong signal that the company has something real. It is extremely difficult to fake ROCE over a ten-year period. Either the business can take capital and turn it into profit, or it cannot, and the accounts will tell on it eventually.

Operating margin is the second number that matters. Industrial small-caps do not need software-style margins to be excellent investments. They need margins that are stable, that expand gradually as the business gains scale, and that survive the inevitable cost shocks. A company whose operating margin is consistently in the mid-teens, and which has held that line through a raw-materials spike or a currency move, is telling you that it has pricing power. In the small-cap world, pricing power is the closest thing to a moat, because it means customers cannot easily switch to a cheaper alternative without accepting a real cost elsewhere.

The order book is the third piece of the picture, and it is the one that lets you look a little way into the future. A good industrial small-cap reports its order book or forward revenue visibility in its half-year and full-year updates. You want to see the book growing in line with, or ahead of, revenue. You want to see a reasonable spread of customers inside it. You want to see a management team that talks about the book in specific terms rather than generalities. When a company stops disclosing the order book, or starts describing it in softer language, that is worth noticing.

Customer concentration is the final number, and probably the one private investors most often skip past. An industrial small-cap that generates forty per cent of its revenue from a single customer is a fundamentally different investment from one where no customer represents more than five per cent of the top line. There is nothing inherently wrong with concentration, and sometimes it reflects genuine partnership with a large buyer. But it has to be understood as a risk you are taking on, and it has to be priced into what you are willing to pay for the shares. A low-concentration industrial small-cap with steady margins and a growing order book is the profile that most consistently produces long-term returns.

The reason these companies tend to be mispriced for long periods comes down to how the market actually works at the smaller end. Analyst coverage is thin. Institutional mandates often exclude positions below a certain market cap. Retail investors gravitate towards companies with stories rather than spreadsheets. A manufacturer of specialist engineering components is therefore left largely to its own devices, reporting twice a year into a market that is not paying much attention. If the numbers are genuinely good, this inattention becomes an asset to the investor who is paying attention. You are buying good accounts at a reasonable multiple because nobody is competing very hard to own the shares.

There is a quieter discipline required to hold these companies as well. Their share prices move modestly for long periods. The news flow is often limited to trading updates and results days. There are no transformational catalysts to argue about on investment forums. For an investor used to the minute-by-minute swings of an exploration junior or a clinical-stage biotech, a boring small-cap can feel, at first, as though nothing is happening. The returns that build up over five and ten years in these names are often invisible on a one-year chart, and they reward the investor who is comfortable doing very little.

None of this is an argument that every dull-looking industrial company is worth owning. There are plenty of low-growth manufacturers with weak balance sheets, high customer concentration and declining end-markets, and their share prices will reflect those realities over time. The point is that the category as a whole is systematically overlooked, and that within it there are genuinely excellent businesses whose accounts tell a clearer story than their narrative suggests. Pricing power, sustained ROCE, growing order books, diversified customers, conservative management and disciplined capital allocation are the traits that repeat in the winners. They rarely arrive together in a single loud announcement. They accumulate quietly in successive reports, and the investors who do best in this segment are usually the ones who learn to read those reports carefully and then wait.

This post is drawn from The Little Book of Small-Caps by Cameron Oliver. Republished with permission.

Small Caps is a series drawn from first-hand experience of UK and global small-cap markets, updated as each new chapter arrives.

Disclaimer: The value of investments can go down as well as up, and you may get back less than you invest. This article is for informational and educational purposes only and does not constitute financial advice. Always do your own research and consider seeking independent advice before making any investment decision.

This article is for informational purposes only and does not constitute financial advice. Investment values can go down as well as up. Always do your own research before making any financial decisions.