This paper documents the impact of supply chain disruptions on operating performance. Based on a sample of 885 disruptions announced by publicly traded firms, we estimate that in the year leading to the announcement, firms on average experience a 107% drop in their operating income, 114% drop in return on sales and 93% drop in return on assets. During this time period the level of return on sales drops by 13.78% and return on assets by 2.32%. Firms that experience disruptions face on average 6.92% lower sales growth, 10.66% growth in cost, and 13.88% growth in inventories.