This article was automatically generated by MarketWatch using technology from Automated Insights.
Shares of Illumina Inc. (ILMN) shed 1.15% to $134.87 Friday, on what proved to be an all-around rough trading session for the stock market, with the S&amp;P 500 Index  falling 1.07% to 6,827.41 and Dow Jones Industrial Average  falling 0.51% to 48,458.05.
The stock's fall snapped a three-day winning streak.
Illumina Inc. closed 11.88% below its 52-week high of $153.06, which the company achieved on January 14th.
The stock underperformed when compared to some of its competitors Friday, as Labcorp Holdings Inc. (LH) fell 0.21% to $264.18, Charles River Laboratories International Inc. (CRL) fell 0.72% to $193.03, and Quest Diagnostics Inc. (DGX) rose 0.55% to $182.56.
Trading volume (1.7 M) remained 74,589 below its 50-day average volume of 1.8 M.
Data source: Dow Jones Market Data, FactSet. Data compiled December 12, 2025.
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12-12-25 1727ET

ILMN

<p>Illumina Inc.'s stock fell 1.15% to $134.87 on Friday, underperforming compared to competitors like Labcorp Holdings and Charles River Laboratories. The stock snapped a three-day winning streak and closed 11.88% below its 52-week high. Trading volume was slightly below the 50-day average.</p>

Illumina Inc. Stock Underperforms Friday When Compared To Competitors