Historical annual and monthly returns for Quest Diagnostics (DGX).
For Quest Diagnostics (DGX), the strongest completed calendar year was 2000, when the stock returned 364.7%, while its weakest was 2002, with a return of -20.6%. Across the 26 completed calendar years from 2000 through 2025, its average annual return was 22.9% and its compounded annual return was 14.2%. DGX posted positive returns in 19 of those 26 years (73%). In 2025, the latest completed year, it returned 17.2%. In 2026 year to date, DGX has returned 38.7%.
Returns are calculated from the adjusted daily closing prices for Quest Diagnostics (DGX). Annual returns measure the percentage change between the final available trading prices of consecutive calendar years. Monthly returns use the corresponding month-end observations. Adjusted prices account for stock splits and distributions when supplied by the market-data provider. Results are nominal and are not adjusted for inflation.
