Why Industrials Has More Conglomerates Than Any Other Sector

Introduction

The industrials sector contains more diversified conglomerates than any other sector in the economy. GE, Honeywell, 3M, Siemens, Emerson, Danaher, ABB, and Illinois Tool Works all grew into multi-segment enterprises spanning dozens of end markets, hundreds of product lines, and operations in 50+ countries. No other sector in the global economy (not healthcare, not TMT, not financial services, not energy) has produced a comparable density of large, diversified companies that operate across fundamentally different business lines under a single corporate umbrella.

Understanding why conglomerates formed, how they operated, and why they are now breaking apart is essential for industrials bankers because conglomerate transactions (breakups, spin-offs, carve-outs, activist campaigns) represent the largest individual advisory fee pools in the entire sector. When Honeywell announced its three-way split, the advisory fees across all participating banks exceeded $100 million. The GE three-way separation generated even larger cumulative fees across its multi-year execution.

1. The GE Model Set the Template

General Electric, under Jack Welch's leadership from 1981 to 2001, became the most admired company in America and the world's most valuable company by market capitalization. GE's model of diversifying into dozens of businesses (aircraft engines, power generation, healthcare equipment, media, financial services, plastics, lighting) while applying a common management system across all of them became the template that an entire generation of industrial CEOs sought to replicate.

The GE Model of Conglomerate Management

A corporate strategy where a parent company acquires and operates businesses across multiple unrelated industries, applying a common management training program, financial discipline, and operational rigor to each business unit. The theory held that "management excellence" was transferable across industries: a great manager could run a jet engine division as effectively as a plastics division because the management tools (Six Sigma, leadership development, performance accountability) were universal. The GE model carried enormous prestige throughout the 1980s and 1990s, leading dozens of industrial companies to emulate GE's diversification strategy. Former GE executives who became CEOs at other companies (at Honeywell, 3M, Home Depot, and others) brought the GE playbook with them, spreading the conglomerate model across the industrial landscape.

Honeywell's evolution illustrates the template effect. Allied Signal, led by former GE executive Larry Bossidy, diversified aggressively before merging with Honeywell in 1999. The combined entity continued the diversification strategy, operating in aerospace, building technologies, performance materials, and safety and productivity solutions. The same pattern repeated at dozens of other industrial companies where the prevailing strategic wisdom favored diversification as a path to growth and stability.

2. Industrial Businesses Share Operational Commonalities

Unlike technology or healthcare, where each business requires fundamentally different expertise (a semiconductor company and a social media company share almost nothing operationally), industrial businesses share common operational DNA: manufacturing processes, supply chain management, engineering design, global distribution networks, and field service organizations. This shared DNA created a plausible synergy narrative for diversification.

3. Cash-Generative Business Units Funded Further Diversification

Industrial businesses with long product lifecycles and aftermarket revenue streams generate predictable free cash flow that corporate parents used to fund acquisitions. A jet engine division generating $2 billion in annual free cash flow provided the acquisition currency for the parent to buy businesses in completely different industries. The Danaher Business System model evolved from this tradition: Danaher used the cash flow from its existing businesses to fund acquisitions of new businesses, applied DBS to improve them, and used the improved cash flow to fund still more acquisitions.

This self-funding acquisition flywheel meant that industrial conglomerates could diversify without external capital (issuing equity or taking on excessive debt) because each business unit's cash generation funded the next acquisition. The flywheel operated for decades, building increasingly diversified enterprises that eventually became too complex for investors to evaluate and for management to optimize.

Understanding the specific conglomerates and their business compositions provides essential context for the breakup wave analysis that follows.

General Electric was the archetype. At its peak, GE operated in aviation (jet engines), power (gas turbines, renewable energy), healthcare (medical imaging, diagnostics), capital (financial services), media (NBC Universal), lighting, plastics, and dozens of other businesses. Revenue exceeded $180 billion at peak, and the company's total market capitalization exceeded $600 billion at its peak in 2000. The unwinding took over a decade: GE Capital was divested after the 2008 financial crisis, NBC Universal was sold to Comcast, and the final three-way split was completed in 2024.

Honeywell operates across aerospace (cockpit avionics, aircraft systems), building technologies (fire safety, HVAC controls, security), performance materials and technologies (specialty chemicals, advanced materials), and safety and productivity solutions (warehouse automation, sensing technologies). Revenue of approximately $37.4 billion in 2025 will be split across three separate companies under the announced separation plan.

3M diversified into safety and industrial, transportation and electronics, healthcare, and consumer products, producing everything from Post-it Notes to surgical tapes to industrial adhesives. The company separated its healthcare business into Solventum in 2024, reducing the conglomerate complexity but still operating across multiple disparate business lines.

Siemens (Germany) has historically been Europe's largest industrial conglomerate, spanning power generation, healthcare (Siemens Healthineers, partially listed), transportation (Siemens Mobility), building technology, and digital industries (factory automation, industrial software). Siemens has progressively simplified by listing Siemens Healthineers and spinning off Siemens Energy, but the parent still operates across multiple segments.

Emerson Electric divested its Climate Technologies segment to Blackstone for $14 billion and acquired National Instruments for $8.2 billion, transforming from a diversified conglomerate into a focused automation and process control company. Emerson's transformation illustrates the most deliberate version of the breakup thesis: using divestiture and acquisition simultaneously to create a more focused, higher-growth entity.

Danaher represents a unique case: the company diversified aggressively through acquisitions but has also been one of the most aggressive separators, spinning off Fortive (2016) and Veralto (2023) while refocusing the remaining business on life sciences and diagnostics. The Danaher Business System was the glue that held the diversified portfolio together, and its success in driving margin improvement across disparate businesses partially offset the conglomerate discount. But even Danaher ultimately concluded that focused entities would create more shareholder value than continued diversification.

The European conglomerates add an important dimension. Siemens, ABB, Schneider Electric, and Thyssenkrupp are all diversified industrials that have been undergoing their own (often slower) separation processes. The European market has historically been more tolerant of conglomerate structures (the "industrial champion" model has political support in Germany, France, and Japan), but activist pressure and US investor influence are gradually pushing European conglomerates toward simplification. The McKinsey study on European defense consolidation highlighted that Europe operates six times more platform types than the US, reflecting a broader European pattern of maintaining diversified national champions rather than creating focused pure-play companies.

The conglomerate model is in its most dramatic reversal in industrial history. GE completed its three-way split into GE Aerospace, GE Vernova (power and energy), and GE Healthcare. Honeywell announced a three-way separation. 3M spun off its healthcare business. Emerson divested its Climate Technologies segment to Blackstone for $14 billion. Danaher separated Veralto (water quality and product identification). The separation wave has unwound more conglomerate value in 2024-2026 than was created in the preceding two decades of diversification, representing one of the most significant structural transformations in the history of American industrial capitalism.

Several forces drove the reversal:

Investor preference for pure plays. Modern portfolio theory suggests that investors should not pay a premium for diversification (they can diversify their own portfolios by buying individual stocks). Pure-play companies with focused strategies, transparent financials, and dedicated management teams receive higher valuation multiples than conglomerate business units buried in segment reporting.

Management complexity and attention dilution. Running four different businesses in four different end markets with four different competitive dynamics stretches management attention thin. The CEO of a conglomerate cannot be deeply knowledgeable about aerospace, building technologies, advanced materials, and safety products simultaneously. Focused companies with dedicated leadership consistently outperform conglomerate business units in the same industry.

Capital allocation inefficiency. Conglomerate corporate centers allocate capital across business units through an internal budgeting process that may not reflect market-driven investment opportunities. A high-growth, high-return business unit may be starved of investment capital because the corporate center is funding a lower-return division that happens to have more political influence within the organization. Separation allows each business to access capital markets independently and allocate capital based on its own investment opportunities. GE Aerospace's ability to invest aggressively in the LEAP engine aftermarket as an independent company, without competing for capital against GE Vernova's renewable energy projects, illustrates this benefit.

Activist catalyst. Activist investors have become the primary catalyst for conglomerate breakups. Firms like Elliott Management, Trian Partners, and Third Point have developed sophisticated SOTP analyses that quantify the conglomerate discount and present the value gap to boards and public shareholders. The threat of a proxy fight, combined with the embarrassment of having an activist publicly demonstrate that the company is worth more broken up than whole, has motivated boards to announce separations proactively rather than waiting to be forced. Honeywell's separation announcement came shortly after Elliott Management disclosed a position and published a detailed breakup analysis.

Successful precedents reduce resistance. Each successful breakup (where the separated entities' combined market capitalization exceeds the pre-breakup market cap) reduces the resistance to the next breakup. GE Aerospace's post-separation stock performance, which significantly outperformed the prior GE stock, gave boards at other conglomerates the evidence they needed to justify separations to skeptical directors and employees. The virtuous cycle of "breakup, value creation, next breakup" is self-reinforcing and shows no signs of slowing.

The pattern of conglomerate formation and eventual separation follows a predictable lifecycle that has played out across the entire industrials sector.

Phase 1: Formation (1960s-1990s). Industrial companies diversify through acquisition, motivated by the GE model, management hubris, and the strategic logic of the era that favored size and diversification as defenses against economic volatility. Each acquisition adds a new business unit with its own end markets, customers, and competitive dynamics. Revenue grows rapidly as acquisitions stack on top of organic growth.

Phase 2: Maturity (1990s-2010s). The conglomerate reaches peak complexity, with 5-10+ distinct business units, tens of billions in revenue, and global operations. The corporate center grows to manage the complexity: large headquarters staffs, elaborate planning processes, and internal transfer pricing mechanisms. Performance begins to diverge across business units (some growing quickly, others stagnating or declining), but the corporate structure makes it difficult to allocate resources efficiently because internal politics and historical precedent influence capital allocation as much as economic merit.

Phase 3: Selective pruning (2010-2020). Under pressure from activists and institutional investors, conglomerates begin divesting "non-core" business units while claiming that the remaining portfolio is "focused." This phase produces some M&A activity but does not fundamentally resolve the conglomerate discount because the remaining entity is still diversified enough to warrant a discount. Honeywell's divestiture of its turbocharger business and home comfort business during this period is typical of the selective pruning approach.

Phase 4: Full separation (2020-present). The board and management conclude that the conglomerate discount can only be resolved through complete separation into focused pure-play entities. The separation is executed through spin-offs, split-offs, or carve-out sales, creating 2-4 independent companies from the former conglomerate. Each new entity establishes its own board, management team, capital structure, and investor base. The combined market capitalization of the separated entities typically exceeds the pre-separation conglomerate value by 10-25%, validating the thesis that the whole was worth less than the sum of its parts.

This lifecycle takes 30-50 years from formation to full separation. The companies now separating (Honeywell, 3M) diversified primarily in the 1980s and 1990s, meaning the conglomerate structures persisted for 25-40 years before the breakup pressure became irresistible. The lesson for the next generation of industrial companies is that the market's tolerance for diversification has permanently decreased; companies that diversify today face the expectation that they will eventually simplify.

The conglomerate phenomenon creates the largest and most complex advisory mandates in all of industrials.

Separation advisory. Each conglomerate breakup generates multiple advisory workstreams: strategic alternatives analysis (evaluating all options including full breakup, partial divestiture, and remaining intact), standalone financial preparation (carving out each business unit's financial statements from consolidated reporting), tax structuring (optimizing the separation to minimize tax friction), capital markets execution (the separation itself, whether through spin-off, split-off, or IPO), and follow-on transactions (each newly independent entity typically pursues its own M&A strategy post-separation).

SOTP valuation is a core banking skill. Every conglomerate coverage effort requires SOTP analysis to assess the discount, evaluate separation scenarios, and frame the value opportunity for activists, boards, and investors. Building credible SOTPs requires deep knowledge of each segment's comparable companies, standalone margin profiles, corporate cost allocation methodology, and appropriate multiples for each segment. The SOTP is the analytical centerpiece of every conglomerate conversation, whether the banker is advising the board on strategic alternatives, defending against an activist campaign, or pitching a separation to management.

Activist defense and engagement. When activists target industrial conglomerates, the banker advises the board on the merits of the activist's proposals, builds counter-analyses, and helps design strategic responses (proactive separations, accelerated capital returns, operational improvements) that address the activist's concerns while preserving management's strategic vision.