[Excerpt] 2021 was a dramatic year for the US labor movement, with an upsurge in strike activity that gained extensive media attention. In light of ongoing speculation about the scope of these actions, we are particularly pleased to release the first ILR Labor Action Tracker Annual Report, which presents key findings from our data on work stoppages in 2021. We have created a comprehensive database of strikes across the United States because official data sources only record a small fraction of this activity. Since funding cuts by the Reagan administration in the early-1980s, the Bureau of Labor Statistics (BLS) only documents very large work stoppages - those involving 1,000 or more workers that last at least an entire shift. As this report demonstrates, only recording very large work stoppages excludes the vast majority of strike activity and leaves practitioners, policymakers, and scholars misinformed about the true level of workplace conflict. Strikes remain an important source of labor activism (and may be increasing in salience), as workers collectively stop work to address a range of demands, including, but not limited to, pay, health and safety, and racial justice. In this report, we follow the lead of the BLS and document work stoppages, which include both strikes and lockouts. You can follow our project and view our monthly reports of strike activity on Twitter @ILRLaborAction.