Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

- Arm Holdings Plc (ARM) shares rose by the most in almost a year after the company announced plans to sell its own chips for the first time — a move forecast to generate about $15 billion annually within five years. Meta Platforms Inc. will be the first major customer for the company’s chip, called an AGI CPU, Arm said Tuesday at an event in San Francisco. The product will have as many as 136 cores — a measure of processing power — and draw 300 watts of electricity, according to the UK-based company. Taiwan Semiconductor Manufacturing Co. will produce the chips.

- Driven Brands (DRVN) rose in extended trading after a Wall Street Journal report that activist ADW Capital is encouraging the automotive services firm to explore a sale or breakup.

- Navan (NAVN) shares are up after the business travel platform reported earnings and revenue for the fourth quarter that beat the average analyst estimate.

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