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Boring is Beautiful: Overlooked Opportunities in Small Companies


Everyone wants to admire the cathedral. Nobody wants to talk about the quarry.

We remember the soaring ceilings, the stained glass and the genius of the architect. We do not erect statues to the fellow extracting stone from the ground and hauling it across mud for 20 years. Markets behave similarly. They celebrate the glamorous endpoint and ignore the grubby prerequisites. Yet the quarry owner, not the dreamer with a sketchpad, is often closer to the cash flow.

In small- and micro-cap investing, many of the most compelling opportunities exist far upstream from where attention naturally concentrates. They are not particularly fashionable businesses, rarely dominate headlines or benefit from thematic enthusiasm. Instead, they often operate in industries viewed as mundane: limestone, coatings, cement or industrial minerals.

Yet these businesses frequently possess exactly the characteristics long-term investors should value most—durable competitive positions, difficult-to-replicate assets, rational competitive dynamics and long-duration reinvestment opportunities.

In our experience, boring is often beautiful.

The Market’s Preference for Glamour

Markets frequently reward narrative before economics. Businesses associated with disruptive technologies, rapidly expanding addressable markets or compelling thematic stories often attract disproportionate investor attention. Wall Street has always preferred the chandelier to the invoice for concrete.

Meanwhile, businesses tied to aggregates, coatings, cement or industrial minerals are often dismissed as mundane before their underlying economics are fully appreciated. In many cases, the opportunity begins with that initial disinterest. A quarry operator, cat litter producer or galvanizing business rarely survives the first screen for investors searching for technological disruption or rapid narrative acceleration.

That reaction itself can become a source of inefficiency.

Some of the most attractive businesses in the micro-cap space are hiding in plain sight precisely because their descriptions appear too ordinary to warrant deeper work. Yet the very characteristics that make these businesses appear unexciting to the market—physical assets, regional concentration or operational simplicity—can also create durable barriers to entry and attractive competitive dynamics over long periods of time.

Importantly, many of these businesses are foundational to economic activity. They may not sit at the glamorous endpoint of the value chain, but they frequently occupy positions that are difficult to displace.

Scarcity Often Hides in Plain Sight

United States Lime & Minerals (USLM) is a useful example of this concept. On the surface, the company operates limestone quarries and produces lime products used in construction, steel manufacturing, water treatment and industrial applications. It is not the type of business that typically commands significant investor attention.

But beneath that simplicity lies a highly strategic asset base.

High-quality limestone deposits are scarce, while regulatory approvals, zoning restrictions and environmental permitting create meaningful barriers to entry. Just as importantly, limestone economics are highly regional. The product typically moves within roughly 400 miles of the plant, meaning proximity, reserve quality and logistics infrastructure materially shape competitive positioning.

As we dug deeper while researching the company, what initially appeared to be a commodity business revealed localized market structures, embedded pricing power and durable competitive advantages supported by assets that would be extraordinarily difficult to recreate.

USLM operates in attractive regional markets tied to Texas and the broader I-35 corridor, areas benefiting from infrastructure spending, industrial activity and long-term population growth. The company also receives relatively little institutional attention despite generating strong operating margins, substantial free cash flow and maintaining a fortress balance sheet.

The market sees a quarry operator—we see scarce reserves, rational industry dynamics and strategically valuable infrastructure positioned within growing regional markets.

The quarry owner, not the architect, may ultimately possess the scarcer asset.

Infrastructure Businesses Without the Narrative

Many overlooked businesses derive their strength not from technological disruption, but from physical networks built over decades.

Titan America (TTAM) provides a compelling example. The company produces cement, aggregates and ready-mix concrete across key East Coast markets including Florida and the Mid-Atlantic. Cement may not inspire investor excitement, but the economics of the business are heavily influenced by assets that would be exceptionally difficult and costly to replicate.

Over decades, Titan has built an integrated logistics network tied to rail lines, import terminals and strategically located production facilities. In management’s words, logistics costs have become “as important as production costs.”

This carefully built network matters because cement is fundamentally a local commodity. Transportation costs, terminal access and geographic density often determine competitive positioning as much as production itself. At the same time, long-term demand drivers, including infrastructure spending, manufacturing reshoring and population migration, continue to support attractive end markets.

Coatings producer AZZ represents a similar type of overlooked industrial franchise. Galvanizing steel structures may not sound exciting, but corrosion protection remains essential for electrical transmission infrastructure, bridges, utility systems and industrial construction. Businesses like AZZ quietly occupy critical positions within infrastructure ecosystems while benefiting from localized scale advantages, recurring demand and long-standing customer relationships.

These businesses rarely produce dramatic headlines. Instead, they compound value steadily through operational execution, disciplined capital allocation and rational reinvestment.

Innovation Does Not Always Look Disruptive

One of the market’s recurring mistakes is assuming “boring” businesses are static businesses.

Oil-Dri (ODC) may be one of the clearest examples of why surface-level impressions can be misleading in small- and micro-cap investing. On paper, the company owns clay mines and produces cat litter products. Many investors likely stop reading there.

Yet beneath that description sits a vertically integrated mineral business with valuable reserve positions, multi-generational family stewardship and expanding exposure to higher-value applications including renewable diesel filtration, animal health and specialty lightweight litter products.

Over time, management has steadily repositioned the business toward higher-value applications including lightweight litter, crystal litter and fluid purification products tied to renewable diesel production. The company has also developed animal health products designed to support antibiotic-free protein production through mineral-based gut health solutions.

That innovation does not resemble the type typically celebrated by the market. It is incremental rather than disruptive. Yet incremental innovation applied consistently over long periods can produce substantial value creation.

Durable compounding rarely requires constant reinvention. More often, it requires disciplined improvement applied consistently over time.

Looking Where Others Aren’t

Our investment process is designed to identify situations where market perception diverges meaningfully from long-term intrinsic value. In many cases, the most compelling opportunities are not businesses attempting to change the world overnight. They are businesses quietly enabling the world to function every day.

These businesses are often operationally intensive, asset heavy and lacking obvious narrative appeal. They may not screen well in momentum-driven environments or attract substantial investor attention during periods dominated by thematic enthusiasm. Yet over longer periods, durability, pricing power and disciplined reinvestment frequently matter more than excitement.

Importantly, we are not simply seeking statistically inexpensive businesses. We are looking for businesses capable of compounding intrinsic value while reducing the probability of permanent impairment of capital. Opportunities like these rarely emerge from broad thematic screens or consensus narratives. They emerge through primary research, operational understanding and a willingness to investigate businesses others dismiss too quickly.

The cathedral may attract admiration. But over time, the quarry, the rail terminal, the galvanizing facility and the mineral reserve may prove to be the more durable economic assets.

In small- and micro-cap investing, that is often where long-term compounding begins.

As of 31 March 2026, Diamond Hill owned shares of United States Lime & Minerals, Inc., Titan America SA, AZZ, Inc. and Oil-Dri Corp. of America.

Securities referenced may not be representative of all portfolio holdings. The reader should not assume that an investment in the securities was or will be profitable

The views expressed are those of Diamond Hill as of May 2026 and are subject to change without notice. These opinions are not intended to be a forecast of future events,  a guarantee of future results or investment advice. Investing involves risk, including the possible loss of principal. Past performance is not a guarantee of future results.

DIAMOND HILL® CAPITAL MANAGEMENT, LLC. | DIAMOND-HILL.COM | 855.255.8955 | 325 JOHN H. MCCONNELL BLVD | SUITE 200 | COLUMBUS, OHIO 43215
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