Center for
Corporate
Governance.

ISSUE #71
March 2026

CORPORATE GOVERNANCE INSIGHTS.

How Institutional Ownership Is Rewriting Corporate Governance

MIREIA GINÉ

Over the past two decades, the ownership structure of global corporations has undergone a marked transformation. Large institutional investors such as BlackRock, Vanguard or Fidelity — once background players in corporate governance — now exert growing influence over both the composition of boards and the strategic direction of firms. Globally, ownership concentration among the top five investors per firm has risen steadily, creating more homogeneous shareholder bases, particularly among very large firms.

Ownership Concentration is Trending Upwards
The nature of ownership concentration varies by region. In the U.S., institutional ownership is dominated by universal investors — those holding diversified stakes across the entire market. In Europe, families are increasingly delegating wealth to institutional vehicles. The trend is toward diversification: from industrial to financial portfolios. In Asia, families and state actors still control large swaths of equity. Yet even there, exchange-traded funds (ETF) driven penetration is on the rise.
The growth of passive investment, largely through ETF, has been instrumental. These funds, which track indices rather than select stocks, now account for a significant share of equity investment.

Passive Funds’ Impact on Governance Mechanisms
The growing presence of passive funds poses an interesting dilemma in the governance of firms where they invest. On the one hand, they are long-term holders without a clear exit option, and therefore, should be incentivized to do governance research. On the other hand, these funds are not rewarded for “beating the index,” they put pressure on fees and this might provide weak incentives for deep monitoring.
Interestingly, there is ample academic evidence that passive investors do have governance impact as they enter large publicly traded firms: 1) boards have higher appointments of independent directors; 2) there is greater opposition to anti-takeover provisions and dual-class structures; 3) disclosure becomes more forward-looking with earnings guidance and earlier filings; 4) more analysts cover the firm and that reduces some asymmetry of information; and 5) from a capital allocation perspective, payouts to shareholder increase while capex decreases.

Mergers and Acquisitions: Consolidation over Discipline
One of the more consequential channels of influence is in M&A activity. Our research shows that institutional investors — particularly universal owners — are supportive of consolidation. This stems from their incentive alignment across firms: while discipline might improve individual performance, consolidation can lift sector-wide margins in their portfolios.
Institutional support for such deals reflects a shift in governance logic — away from disciplining managers to optimizing portfolio performance when those portfolios have strong positions in natural rivals.

Voting and Monitoring: How Influence is Exerted
Institutional investors do engage and vote at both routine annual shareholder meetings and high-stakes contests. Their governance teams examine regulatory filings, proxy statements and proposals. This research reduces inefficient investment and increases distributions to shareholders.
In high-profile proxy battles, institutional votes often tip the balance. When activists win the support of passive giants, boards frequently settle. Conversely, lack of support from passive funds significantly weakens dissident campaigns. Their role is not merely procedural — it is pivotal.

What Boards Should Do Now
Ownership structure is no longer a background variable. It shapes how strategies are judged, which governance choices are tolerated and when boards are supported or challenged. Directors who regularly revisit these questions are better positioned to anticipate shareholder reactions rather than respond to them. Other actions to consider:
1.   Map your ownership structure: Know who your largest institutional shareholders are, how diversified they are, and how they typically vote.
2.   Anticipate consolidation logic: Understand how some owners may view M&A differently from traditional shareholders.
3.   Strengthen baseline governance: Independence, transparency and credible capital allocation policies are now minimum expectations, not differentiators.
4.   Engage early, not defensively: Institutional investors value consistency and clarity more than reactive explanations.

figure spotlight.

OECD (2025), OECD Corporate Governance Factbook 2025, OECD Publishing, Paris

OECD data show that ownership concentration remains a defining feature of global listed companies. In 44% of listed firms worldwide, the three largest shareholders together hold more than half of the equity, while cases of highly dispersed ownership are rare.

NEWS&TRENDS.

Professor Steen Thomsen, in a recent ECGI blog post, discusses enterprise foundations as an ownership model, highlighting how foundation-controlled companies can support long-term value creation and responsible governance. He argues that existing national foundation laws are ill-suited to this model and calls for modern, fit-for-purpose regulatory frameworks. Read more here.

An analysis of 2025 data by Russell Reynolds shows that CEO turnover remains elevated and tenures continue to shorten, reflecting boards’ lower tolerance for strategic underperformance and execution risk. In this environment, succession planning has become more critical, with boards under pressure to ensure credible internal pipelines and avoid reactive leadership transitions, including the return of former chief executives. Read here.

As institutional investors become more selective in their voting and engagement, proxy advisers are refining their guidelines and positions on shareholder proposals and governance reforms. The shift reflects evolving power dynamics in shareholder engagement. Read more here.

A recent KPMG analysis highlights the growing complexity of the board agenda in 2026. Boards are encouraged to deepen forward-looking engagement on strategy, including scenario planning, resilience and crisis preparedness, while strengthening oversight of technology, AI, cybersecurity and workforce-related risks. The analysis emphasizes that board effectiveness, composition and governance structures are becoming central to long-term value creation. Read here.

NEWSLETTEr sign up

CCG Website

Customize Your Experience

We care about sending you only the information that matters to you. Click the button below to access your preferences page and tailor the content you want to receive from us.