Shareholder voting on corporate acquisitions is controversial. In most countries, acquisition decisions are delegated to boards, and shareholder approval is discretionary, which makes existing empirical studies inconclusive. We study the U.K. setting in which shareholder approval is imposed exogenously via a threshold test that provides strong identification. U.K. shareholders gain 8 cents per dollar at announcement with mandatory voting, or 13.6 billion over 1992-2010 in aggregate; without voting, U.K. shareholders lost 3 billion. Multidimensional regression discontinuity analysis supports a causal interpretation. The evidence suggests that mandatory voting imposes a binding constraint on acquirer chief executive officers.

[This article reports a unique analysis of private engagements by an activist fund. It is based on data made available to us by Hermes, the fund manager owned by the British Telecom Pension Scheme, on engagements with management in companies targeted by its UK Focus Fund. In contrast with most previous studies of activism, we report that the fund executes shareholder activism predominantly through private interventions that would be unobservable in studies purely relying on public information. The fund substantially outperforms benchmarks and we estimate that abnormal returns are largely associated with engagements rather than stock picking.]

This paper provides evidence on the incidence, characteristics, and performance of activist engagements across countries. We find that the incidence of activism is greatest with high institutional ownership, particularly for U.S. institutions. We use a sample of 1,740 activist engagements across 23 countries and find that almost one-quarter of engagements are by multi-activists engaging the same target. These engagements perform strikingly better than single activist engagements. Engagement outcomes, such as board changes and takeovers, vary across countries and significantly contribute to the returns to activism. Japan is an exception, with high initial expectations and low outcomes.

Can shareholder voting prevent managers from destroying value in corporate acquisitions? Previous studies based on U.S. data are inconclusive because shareholder approval is discretionary. We study the U.K. where approval is mandatory for deals exceeding a multivariate relative-size threshold. We find that in the U.K. shareholders gain 8 cents per dollar at announcement with mandatory voting, or $13.6 billion over 1992-2010 in aggregate; without voting, U.K. shareholders lost $3 billion. U.S. shareholders lost $214 billion in matched deals. Differences-in-differences and multidimensional regression discontinuity analyses support a causal interpretation. Our evidence suggests that mandatory voting imposes a binding constraint on acquirer CEOs.

This paper provides evidence on the incidence, characteristics, and performance of activist engagements across countries. We find that the incidence of activism is greatest with high institutional ownership, particularly for U.S. institutions. We use a sample of 1,740 activist engagements across 23 countries and find that almost one-quarter of engagements are by multi-activists engaging the same target. These engagements perform strikingly better than single activist engagements. Engagement outcomes, such as board changes and takeovers, vary across countries and significantly contribute to the returns to activism. Japan is an exception, with high initial expectations and low outcomes.

This article reports a unique analysis of private engagements by an activist fund. It is based on data made available to us by Hermes, the fund manager owned by the British Telecom Pension Scheme, on engagements with management in companies targeted by its UK Focus Fund. In contrast with most previous studies of activism, we report that the fund executes shareholder activism predominantly through private interventions that would be unobservable in studies purely relying on public information. The fund substantially outperforms benchmarks and we estimate that abnormal returns are largely associated with engagements rather than stock picking.

This article reports a unique analysis of private engagements by an activist fund. It is based on data made available to us by Hermes, the fund manager owned by the British Telecom Pension Scheme, on engagements with management in companies targeted by its UK Focus Fund. In contrast with most previous studies of activism, we report that the fund executes shareholder activism predominantly through private interventions that would be unobservable