Diversification in Family Business Groups

Diversification in a family business means the family's wealth and control reach into more than one line of business. Sometimes that's a single company adding a product line. Often it's something bigger: a group of legally separate companies, in different industries, held together by one family. That form shows up across Asia, Latin America and Europe, and it behaves differently from the diversified conglomerate that textbooks warn against.

This article covers what diversification means for family firms, the difference between related and unrelated diversification, the reasons families do it, and what the research says about whether it pays. It sits in the growth-strategies section of the library, whose hub is family business growth strategies. If you want the general (non-family) version of the idea, start with diversification strategy.

What Diversification Means for a Family Firm

In a public company with dispersed shareholders, diversification is mostly a question about corporate strategy: which businesses should we be in? In a family firm, it's also a question about the family. The people deciding own most of the business, many of their relatives work in it, and a large share of the family's net worth sits in one place.

That changes the logic. A family can diversify for reasons a professional manager wouldn't need: to give a second-generation sibling a business to run, to protect wealth from a single industry's downturn, or to keep the family's name attached to a proud legacy. Those aren't the same motives as maximizing shareholder return, and it's why the research on family-firm diversification doesn't always match the research on public conglomerates.

Two structures are worth separating:

• Diversification inside one company. A single operating company enters new products, markets or industries and keeps them under one management team.
• A business group. Several legally independent companies, often in unrelated industries, linked by common family ownership and control. Khanna and Yafeh describe diversified business groups as "legally independent firms operating in multiple markets" and note they're ubiquitous in emerging markets and present even in some developed economies (Business Groups in Emerging Markets: Paragons or Parasites?).

Many families end up with both: a core operating company plus a portfolio of other holdings. The family holding company article covers the legal vehicle that usually ties them together.

Key Facts

• Family firms diversify less than non-family firms, both domestically and internationally, in a sample of 360 firms (160 family-controlled, 200 non-family) (Gomez-Mejia, Makri and Larraza Kintana, 2010, Journal of Management Studies).
• When family firms do diversify, they favor domestic over international moves, and prefer "culturally close" regions when they go abroad (same source).
• Family firms become more willing to diversify as business risk increases (same source).
• In India, performance of group affiliates first declined and then rose with group diversification, and affiliates of the most diversified groups outperformed unaffiliated firms (Khanna and Palepu, 2000, Journal of Finance).
• Khanna and Palepu argued in 1997 that the large, diversified business group remains the dominant form of enterprise throughout most emerging markets (Harvard Business Review, July-August 1997).
• In a 54-year study of 1,237 Spanish olive oil mills, family firms were found to be willing to accept a significant risk to performance to protect their socioemotional wealth (Gomez-Mejia et al., 2007, Administrative Science Quarterly).

Related vs Unrelated Diversification

The standard split in strategy is between related and unrelated diversification. Related diversification moves into businesses that share customers, technology, brands or know-how with the core. Unrelated diversification (sometimes called conglomerate diversification) moves into businesses with little operating overlap. The Ansoff Matrix frames the same choice as new products, new markets, or both at once.

Family firms tend to do both, often in sequence. A founder grows the core through related moves, then the second or third generation, flush with cash and short of room in the original industry, buys into unrelated businesses. The related-to-unrelated drift isn't a plan so much as a pattern: the more capital the core throws off, the more the family needs somewhere to put it.

Why Families Diversify

The reasons fall into three groups: financial, institutional and emotional.

Reducing concentrated risk

The family firm is usually the largest asset the family owns. A shareholder in a public company can spread their savings across hundreds of stocks. A family that owns 70% of one manufacturer can't. Diversification inside the group is a way to build a portfolio from the inside.

The Journal of Management Studies paper above found that family firms are more willing to diversify as business risk increases (Gomez-Mejia, Makri and Larraza Kintana). That fits the intuition: a family facing a volatile core industry looks for a second leg to stand on.

Filling institutional voids

The most influential argument comes from Tarun Khanna and Krishna Palepu. In their 1997 HBR article, they challenged the Western orthodoxy of focused strategies, arguing that the large, diversified business group remains the dominant enterprise form in most emerging markets (HBR, 1997). The usual explanation for why groups thrive there is about institutions. Where capital markets, labor markets and information systems work poorly, a group can in principle supply internally what the market doesn't, such as moving capital between member companies or sharing a trusted name. That's the general logic of the institutional-voids argument, not a finding from the 1997 article itself.

Their 2000 Journal of Finance study of Indian groups tested that idea. They started from the premise that emerging markets like India have poorly functioning institutions, and that groups there can both help member firms and destroy value. What they found was a curve, not a verdict: accounting and stock-market measures of performance initially declined with group diversification, then rose once diversification passed a certain level, and affiliates of the most diversified groups outperformed unaffiliated firms (Khanna and Palepu, 2000). That's an unusual result, because it runs against what researchers found for the lines of business of US conglomerates.

The practical takeaway isn't that diversification always works in emerging markets. It's that the answer depends on what the surrounding institutions supply. A group's advantage is largest where the outside market is weakest, and it tends to shrink as those markets mature.

Protecting socioemotional wealth

Family firms often weigh non-financial goals: control, identity, reputation, and keeping the business in the family. Gomez-Mejia and colleagues call this socioemotional wealth. In their Spanish olive oil mill study, family firms accepted a significant risk to performance to avoid losing it, while also avoiding business decisions that would add to that risk. The authors conclude family firms "may be risk willing and risk averse at the same time" (Gomez-Mejia et al., 2007).

That helps explain a result that might otherwise look odd. If diversification is a standard way to reduce risk, why would family firms do less of it?

What the Research Says About Performance

Two bodies of evidence pull in different directions, and both are worth holding in mind.

Family firms diversify less. In the 2010 Journal of Management Studies paper, the authors found that on average family firms diversify less than non-family firms, both domestically and internationally. When they do, they tend to choose domestic over international diversification, and, for those going abroad, regions that are culturally close (Gomez-Mejia, Makri and Larraza Kintana, 2010). The sample covered 360 firms, 160 of them family-controlled. A plausible reading, in line with the socioemotional wealth argument, is that diversification can dilute family control or require outside capital and managers, which families protect against. That reading is an interpretation of the pattern, not something the abstract states.

Groups can pay off, conditional on context. The Indian evidence above shows group affiliation can create value where institutions are weak. Khanna and Yafeh's survey of the group literature adds a caution: it says the literature focused almost entirely on groups as diversified entities and on conflicts between controlling and minority shareholders, and that it overlooked other lenses, including viewing groups as family-based structures (Khanna and Yafeh, 2005). In other words, the debate over whether groups are "paragons or parasites" is unfinished, and the right answer varies by country, period and group.

Put together:

Don't stretch these studies past what they measured. One is Spanish, one is a sample of 360 firms, one is Indian, and none tells you that diversifying will raise your own family's returns.

Portfolio vs Operating Diversification

A distinction that's easy to miss: owning a diverse set of businesses isn't the same as running them as one diversified company.

• Operating diversification means a single management team runs several lines of business and shares resources among them. Success depends on management capability, and stretching a team across unrelated industries is where it often breaks.
• Portfolio diversification means the family owns separate companies, each with its own management and board, and acts as an active owner or investor. The family's job is capital allocation, governance and choosing leaders, not day-to-day operations.

The portfolio approach fits unrelated diversification better, because it doesn't ask one team to be expert in everything. It also moves the family toward an investor's role, which is where the family office comes in: a dedicated structure for managing the family's wealth and holdings across the portfolio.

Holding Structures

Most family groups use a holding company at the top, owned by the family, with operating companies underneath. The structure does a few practical jobs: it separates the legal risk of each business, gives the family one place to decide on capital and governance, and makes ownership easier to transfer between generations because the family holds shares in one entity rather than in many.

A holding structure also forces choices the family can put off otherwise:

1. Which businesses are core and which are financial investments? Core businesses get management attention. Investments get monitoring.
2. Who sits on the boards of the operating companies? Mixing family, non-family and independent directors affects how well each business is governed.
3. How does cash move? Whether profits stay in each company, go to the holding company, or fund the next venture is a governance decision, not an accounting one.
4. What's the exit rule? A group that never sells anything accumulates businesses nobody wants to run.

Longevity and the Diversification Question

Diversification often gets framed as a survival tool, since a family with several businesses can survive a failure in one. That's a reasonable argument, and it connects to the broader question of why some family enterprises last across generations, covered in family business longevity. But the evidence above doesn't show that more diversification means longer life. A group that grows by accumulating unrelated businesses can be harder to govern and harder to hand on. The better question for most families is not "should we diversify?" but "what are we diversifying for, and who will run it?"

For the corporate-strategy view of the same choice, see corporate strategy. For the two growth routes that often sit alongside diversification in a family firm, see internationalization and innovation.