Capital Goods Industry Map: OEMs, Components, and Aftermarket

Introduction

Capital goods is the broadest and most analytically demanding sub-sector within industrials. The companies here manufacture the physical equipment that other industries use to produce goods, build infrastructure, and move materials. But capital goods is not a monolithic category. It contains business models ranging from heavy equipment OEMs with deeply cyclical revenue to component manufacturers with recurring aftermarket streams that approach the predictability of software subscriptions. Understanding how this sub-sector is organized, and where the value differentiates, is the foundation for everything else in this section of the guide.

The single most important analytical insight in capital goods is that aftermarket revenue is the primary valuation differentiator. Two companies in the same sub-sector with similar revenue and EBITDA can trade at dramatically different multiples based solely on their aftermarket mix. This article maps the three layers of the capital goods value chain, explains the aftermarket economics, and shows how bankers use this framework in practice.

Layer 1: Original Equipment Manufacturers (OEMs)

OEMs design, manufacture, and sell finished capital equipment. This includes heavy machinery (Caterpillar, John Deere, Komatsu), electrical equipment (Eaton, Schneider Electric, ABB), industrial automation systems (Rockwell Automation, Fanuc), and process equipment (Emerson, Honeywell Process Solutions).

OEM revenue is the most cyclically sensitive layer of capital goods because it depends on new equipment purchases, which are deferrable capital expenditure decisions. When the economy weakens, customers delay new equipment purchases (they can keep running existing equipment longer), and OEM order intake declines sharply. Caterpillar's revenue swung from $67.6 billion in 2025 to $38 billion in 2016, illustrating the magnitude of OEM cyclicality.

OEM economics are characterized by high fixed costs (factories, tooling, engineering staff), significant working capital requirements (raw materials, work-in-process inventory), and operating leverage that amplifies revenue swings into even larger earnings swings. Pure-play OEMs without meaningful aftermarket businesses typically trade at 8-12x mid-cycle EBITDA.

Original Equipment Manufacturer (OEM) in Capital Goods

A company that designs, manufactures, and sells complete equipment systems to end users. In capital goods, OEMs include heavy machinery manufacturers (Caterpillar, Deere), electrical equipment makers (Eaton, ABB), automation system providers (Rockwell, Siemens), and process equipment companies (Emerson). OEMs sit at the top of the capital goods value chain, sourcing components from hundreds of suppliers and delivering finished products through dealer networks or direct sales. OEM revenue is the most cyclically volatile component of capital goods.

Layer 2: Component and Subsystem Suppliers

Component suppliers manufacture the parts, subsystems, and assemblies that go inside OEM equipment. Parker Hannifin provides motion and control components (hydraulic cylinders, pneumatic valves, fluid connectors). IDEX makes flow control equipment (pumps, valves, metering systems). Roper Technologies provides instrumentation and measurement systems. Illinois Tool Works manufactures a broad range of engineered components across multiple industrial end markets.

This layer of the value chain has fundamentally different economics than the OEM layer. Component suppliers often have proprietary positions on specific equipment platforms, meaning their parts are designed into the OEM's product and cannot be easily substituted. When a hydraulic valve is specified into a Caterpillar excavator design, Parker Hannifin supplies that valve for the life of the production program and across the global installed base of that excavator model. This platform specification creates switching costs that protect revenue and support pricing power.

Layer 3: Aftermarket Services and Parts

The aftermarket layer includes all revenue generated from maintaining, repairing, overhauling, and providing replacement parts for installed equipment. This includes OEM-provided spare parts and service (Caterpillar's parts and services revenue through its dealer network), independent aftermarket service providers (third-party repair and maintenance companies), and component replacement (Parker Hannifin's aftermarket sales of replacement hydraulic components).

The aftermarket is where the economics of capital goods become most attractive. Aftermarket revenue has three characteristics that differentiate it from new equipment sales:

Aftermarket is recurring and non-discretionary. A factory running 24/7 cannot defer pump replacement or valve maintenance. An airline cannot skip engine overhauls. A construction fleet requires regular hydraulic system service. This non-discretionary nature means aftermarket revenue is far less cyclical than new equipment orders.

Aftermarket margins are substantially higher. A replacement hydraulic pump sold through the aftermarket might carry a 50-60% gross margin, compared to 25-30% for the same pump included in a new equipment sale. The OEM or component supplier benefits from the installed base: the customer is locked into the existing equipment platform and has limited alternatives for compatible replacement parts.

Aftermarket revenue grows with the installed base. Every unit of new equipment sold creates a future stream of aftermarket demand. As the global installed base of industrial equipment expands, the aftermarket revenue opportunity grows even if new equipment sales plateau. This compounding dynamic is why companies with large installed bases and strong aftermarket positions generate the most predictable long-term revenue growth.

The aftermarket/OEM revenue mix is the single most important variable in capital goods valuation. Companies with 40%+ aftermarket exposure consistently trade at 15-22x EBITDA, while pure-play equipment OEMs trade at 8-12x. This premium reflects the lower cyclicality, higher margins, and greater predictability of aftermarket revenue.

For industrials bankers, the practical implication is clear: always decompose a capital goods company's revenue into OEM and aftermarket components before selecting comps or applying multiples. A company that looks like a "capital goods manufacturer" but derives 50% of revenue from aftermarket parts and services should be comped against aftermarket-heavy peers, not against pure-play equipment OEMs. Failing to make this distinction leads to systematic valuation errors.

BCG research found that nearly every industrial OEM surveyed foresaw growth in both parts (96% of respondents) and services (94%) over the next three years, and the global spare parts market is projected to nearly double by 2031. This structural growth in aftermarket demand is driving OEMs to invest in service capabilities, digital monitoring (IoT-enabled predictive maintenance), and service-level agreements that increase recurring revenue. For bankers, this shift from transactional parts sales to contracted service agreements further strengthens the aftermarket valuation premium.

Within the three-layer framework, the capital goods universe is further divided into five distinct sub-segments, each with its own demand drivers, competitive dynamics, and valuation characteristics. Later articles in this section cover each in depth, but the map below provides the orientation.

Heavy Equipment and Machinery

This is the most visible and most cyclical sub-segment. Companies like Caterpillar, John Deere, and PACCAR manufacture large, expensive equipment for construction, mining, agriculture, and trucking. Revenue is tied directly to capex cycles in these end markets, making heavy equipment the sub-segment where cyclicality is most pronounced and mid-cycle normalization is most critical.

Heavy equipment OEMs typically operate through dealer networks that provide both distribution and aftermarket services. Caterpillar's global dealer network is one of the most valuable distribution assets in all of industrials, with dealers carrying inventory, providing financing, and servicing the installed base. The dealer model adds a layer between the OEM and the end customer that smooths revenue slightly (dealers manage inventory buffers) but also creates analytical complexity (dealer inventory levels can mask or amplify underlying demand trends).

Electrical Equipment and Power Management

Eaton, Schneider Electric, and ABB manufacture the electrical distribution, power management, and control systems that power buildings, factories, data centers, and infrastructure. This sub-segment has undergone the most significant valuation re-rating in recent years because of secular growth tailwinds from electrification, grid modernization, renewable energy integration, and AI-driven data center power demand.

Electrical equipment companies have higher aftermarket content than heavy machinery OEMs because their products are installed in buildings and infrastructure with long useful lives (30-50 years), creating decades of replacement and upgrade demand. Eaton's electrical segment, for example, benefits from both new construction (cyclical) and electrical system modernization in existing buildings (secular). This blended demand profile has reduced the sub-segment's effective cyclicality and supported multiple expansion from roughly 12x to 18x+ EBITDA.

Flow Control, Fluid Power, and Process Equipment

Parker Hannifin, Emerson, IDEX, and Roper manufacture the pumps, valves, actuators, sensors, and instrumentation that control fluid flow and process variables in manufacturing, chemical processing, oil and gas, and water treatment. This sub-segment includes some of the highest-quality businesses in all of capital goods because the products are mission-critical, carry high switching costs, and generate substantial aftermarket replacement demand.

Flow control companies typically report EBITDA margins of 22-35%, significantly above heavy equipment OEMs, because their products have higher value relative to cost of goods, smaller production runs (less commodity exposure), and strong aftermarket positions. The sub-segment's cyclicality is moderate; while new installation demand is tied to industrial capex, the replacement and maintenance demand from the installed base provides a stable revenue floor.

Industrial Automation and Robotics

Rockwell Automation, Fanuc, ABB Robotics, and Siemens Digital Industries provide the control systems, robots, sensors, and software that automate manufacturing processes. This sub-segment benefits from the structural labor shortage in manufacturing (over 400,000 unfilled US manufacturing positions in 2025) and the declining cost of automation technology, creating secular demand that partially insulates it from cyclical downturns.

Automation companies are increasingly software-intensive, with recurring software subscription and service revenue complementing hardware sales. Rockwell Automation, for example, is building a platform that combines industrial hardware with software analytics, creating a revenue model that blends traditional capital goods economics with software-like recurring streams. This hybrid model commands premium multiples (14-18x EBITDA) relative to pure hardware automation companies.

Specialty and Engineered Components

Specialty component manufacturers produce small, mission-critical parts (seals, fasteners, connectors, filters, sensors) that represent a tiny fraction of the end product's total cost but are essential to its function. Companies like Nordson, Watts Water Technologies, and dozens of smaller PE-backed platforms operate in this space. The economics are exceptionally favorable: customers have minimal price sensitivity because the component cost is immaterial relative to the cost of equipment failure, and switching costs are high because components are qualified and certified for specific applications.

This sub-segment is where PE roll-up activity is most intense. The landscape is highly fragmented, with thousands of small manufacturers producing specialized components for niche applications. PE sponsors acquire these businesses at 7-10x EBITDA, consolidate them into platforms with shared back-office and procurement, and exit at 12-16x EBITDA through either strategic sales or secondary transactions.

The three-layer framework directly informs several aspects of banking work.

Comp set construction. The most common analytical error in capital goods is comparing companies across layers. Roper Technologies (asset-light, software-enabled, high aftermarket) should not be comped against Caterpillar (asset-heavy, pure OEM cyclical). The comp set should reflect the target company's position within the capital goods layers.

Sell-side positioning. When running a sell-side process for a capital goods company, the banker's most effective tool is demonstrating aftermarket content and recurring revenue. Every percentage point of revenue that can be credibly classified as recurring aftermarket justifies a higher multiple. Building a detailed aftermarket revenue bridge (installed base size x replacement rate x average ticket x parts revenue per unit) is one of the most impactful analytical exercises in a capital goods CIM.

PE deal screening. PE sponsors evaluating capital goods acquisitions prioritize companies with high aftermarket mix because the recurring revenue provides earnings stability that supports leverage, reduces downside risk through economic cycles, and creates predictable cash flow for bolt-on acquisitions. A capital goods platform with 45% aftermarket revenue can support 4-5x leverage, while a pure OEM might only support 2-3x.

Valuation multiple selection. The capital goods map provides the framework for selecting the right comparable companies and the right multiple range. The table below illustrates how dramatically valuation differs across the map.

The Danaher Business System companies (Danaher, Fortive, Roper) occupy the premium end of the valuation spectrum because they combine high aftermarket content with a demonstrated operating system that systematically improves the economics of every business they acquire. Their multiples (18-25x EBITDA) reflect both the current earnings quality and the expected margin improvement trajectory.

Capital goods generates significant M&A activity across all three layers, though the character of deal flow differs by layer.

At the OEM level, M&A tends to be large-cap and strategic: conglomerate divestitures (Emerson selling its climate technologies unit to Blackstone for $14 billion), cross-border consolidation (CRH moving its primary listing to the US), and transformative mergers. These transactions generate the highest individual advisory fees but are episodic rather than consistent.

At the component supplier level, strategic acquirers like Parker Hannifin ($9.25 billion Filtration Group acquisition), AMETEK, and Fortive compete with PE sponsors for proprietary, high-margin businesses with aftermarket content. This is the most competitive M&A market in capital goods, with both buyer types willing to pay premium multiples for businesses that meet their acquisition criteria.

At the specialty and aftermarket level, PE roll-up consolidation generates the highest volume of individual transactions. Hundreds of small manufacturers and service providers change hands annually as PE sponsors build platforms through bolt-on acquisition strategies. This is where middle-market industrials banks like Baird, William Blair, and Lincoln generate their highest deal volume in the capital goods space.

The ongoing shift in capital goods from hardware-only business models toward "product plus service plus software" models is creating new types of M&A activity. Industrial companies are acquiring software capabilities (Emerson's acquisition of National Instruments for $8.2 billion), IoT platforms, and data analytics companies to complement their physical products. These hybrid transactions, where an industrial company acquires a technology company, require bankers who understand both the industrial end-market context and the software business model economics.