With sustained work stoppages in several sectors amidst a presidential election, 2024 marked another important year for the U.S. labor movement. We are excited to release the fourth Labor Action Tracker Annual Report, in which we present key findings from our 2024 work stoppage data. Increasing considerably over the past three years, strikes are an important tool for workplace and labor activism. Since funding cuts by the Reagan administration in the early-1980s, the Bureau of Labor Statistics (BLS) has only documented work stoppages involving 1,000 or more workers that last at least an entire shift. By only recording large work stoppages, official data sources exclude the vast majority of strike activity, posing issues for policymakers, practitioners, and scholars in determining the extent of workplace conflict across the country. In this report, we follow the lead of the BLS and document work stoppages, which include both strikes and lockouts.