Here are some of the day’s biggest movers ahead of Friday’s open:
Stock gainers:
Synaptics Inc.’s 
        SYNA,
        
       stock surged 12.8% after the semiconductor company reported quarterly results that topped analyst revenue and earnings estimates.
Shares of Lions Gate Entertainment Corp. 
        LGF.A,
        
       increased 3.5% after the TV, film and media giant reported a surprise second-quarter profit, and stuck with its full-year outlook “even with the negative impact of the strike” by Hollywood’s writers and actors earlier this year. 
Dentsply Sirona Inc.’s stock
        XRAY,
        
       was up by 2.1% a day after the dental technology company said it would buy back an additional $1 billion in stock. 
Stock decliners:
Shares in Plug Power Inc.
        PLUG,
        
       plunged 38% after the fuel-cell company missed analysts expectations and said its performance had suffered due to “unprecedented supply challenges.” 
Shares in Trade Desk Inc.
        TTD,
        
       dropped 20% after the advertising technology company’s guidance fell short of expectations.
Diageo 
        DEO,
        
       shares fell 14.7% after the Guinness seller said it expects a 20% drop in sales from its Latin American and Caribbean business due to macroeconomic pressures in the region. 
Shares of Illumina Inc. 
        ILMN,
        
       fell 14.1% after the maker of DNA-sequencing technology cut its full-year sales and profit outlook.
Hawaiian Electric  Industries Inc.‘s stock
        HE,
        
       fell 11.2% after the company said it would not provide any full-year 2023 earnings per share estimates due to uncertainty stemming from the Aug. 8 wildfires in Maui.  “We will revisit our ability to provide guidance as we develop better clarity into potential impacts,” the company said. 
Neurocrine Biosciences Inc.‘s stock
        NBIX,
        
       dropped by 6.3% after two drug studies failed to achieve desired results.
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