The Inflation Reduction Act of 2022 imposes a 1 % excise tax on US corporate share repurchases, effective January 1, 2023. The tax's implementation is associated with a significant decline in corporate repurchases that is not offset by a corresponding increase in dividends. Aggregate repurchases decline from about $1 trillion in 2022 to just over $800 billion in 2023, and the average firm reduces quarterly repurchases (as a fraction of market capitalization) by roughly 25 %. The decline in repurchases by US firms far exceeds a contemporaneous decline in repurchases by Canadian firms, is large in a historical context, and is not driven by firm fundamentals. Tax-induced cuts to repurchases are associated with an increase in cash but no increase in investment, implying that the tax has not generated the stated policy objective.

This study examines the role of activist investors in firms’ decisions to conduct open market share repurchases. Compared with firms making ordinary share repurchases, firms making activist-involved repurchases have more cash holdings, are more undervalued, experience better subsequent stock performance and similar improvements in operating performance, and eventually repurchase more shares. Moreover, repurchasing firms in which an activist investor claims to take a passive role exhibit no undervaluation, and repurchasing firms that make multiple repurchases exhibit share undervaluation only in repurchases where an activist is involved. In all, our findings suggest that activist-involvement is associated with improved corporate repurchase decisions.