Feb. 4 at 11:32 PM
$ADT ADT Inc. (NYSE: ADT) is set to join the S&P SmallCap 600 index, effective prior to the opening of trading on Monday, February 9, 2026.
Context: ADT will replace Arrowhead Pharmaceuticals Inc. (NASDAQ: ARWR) in the S&P SmallCap 600.
Move Details: This change is part of a series of updates by S&P Dow Jones Indices where Ciena Corp. moves up to the S&P 500, and Arrowhead Pharmaceuticals moves to the S&P MidCap 400, paving the way for ADT to enter the SmallCap 600.
Recent Developments: ADT was recently upgraded to 'BB' by S&P Global Ratings in July 2025 due to improved credit metrics, reduced debt, and strong free cash flow.
Performance: Over the past 12 months (as of early 2026), ADT underperformed the S&P 500, delivering a +4% return compared to the S&P 500's +15%.