Top Stock Movers – December 22, 2025
U.S. stocks closed higher Monday as Wall Street opened a holiday-shortened week, with gains led by technology shares and a handful of deal-driven movers posting sharp moves.The Nasdaq Composite rose about 0.6%, while the S&P 500 gained roughly 0.6% and the Dow Jones Industrial Average added around 0.5%, as investors looked for momentum into the final days of the year.
UniFirst (UNF) was among the biggest gainers, surging more than 27% after Cintas (CTAS) launched a renewed takeover bid at $275 per share. The sharp jump reflected investor optimism that the long-running acquisition talks could finally lead to a deal.
Rocket Lab (RKLB) also rallied strongly, climbing more than 10%. Shares extended last week’s gains after the company announced an $816 million contract with the U.S. Space Force and reported a record number of successful rocket launches this year, pushing the stock to fresh highs.
In the media sector, Paramount Skydance (PSKY) advanced about 4%, while Warner Bros. Discovery (WBD) rose nearly 4%, after Oracle founder Larry Ellison agreed to personally guarantee more than $40 billion in financing tied to Paramount’s proposed acquisition bid.
On the downside, Trump Media & Technology Group (DJT) fell more than 10%, giving back part of last week’s sharp rally that followed news of a merger with a nuclear-fusion company.
Elsewhere in the market, gains in major indexes were supported by strength in technology and continued enthusiasm around artificial intelligence, while rising geopolitical tensions helped push gold and silver to record highs. Investors now turn their focus to limited economic data releases and early market closures ahead of the Christmas holiday.
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