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Shares of Align Technology Inc. (ALGN) slid 1.63% to $162.73 Monday, on what proved to be an all-around poor trading session for the stock market, with the S&amp;P 500 Index  falling 0.16% to 6,816.51 and Dow Jones Industrial Average  falling 0.09% to 48,416.56.
Align Technology Inc. closed 31.40% short of its 52-week high of $237.23, which the company achieved on January 22nd.
The stock underperformed when compared to some of its competitors Monday, as Zimmer Biomet Holdings Inc. (ZBH) rose 0.92% to $92.43 and Dentsply Sirona Inc. (XRAY) fell 1.47% to $11.40.
Trading volume (1.1 M) remained 319,158 below its 50-day average volume of 1.4 M.
Data source: Dow Jones Market Data, FactSet. Data compiled December 15, 2025.
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12-15-25 1716ET

ALGN

<p>Align Technology Inc.'s stock fell 1.63% to $162.73 on Monday, underperforming compared to competitors like Zimmer Biomet Holdings Inc., which rose 0.92%. The stock is 31.40% below its 52-week high. Trading volume was below the 50-day average. The S&P 500 and Dow Jones also saw declines.</p>

Align Technology Inc. Stock Underperforms Monday When Compared To Competitors