Investing.com – U.S. stocks rose slightly on Monday in quiet trading at the start of the week that also includes the release of the latest consumer price data.

Here are some of the biggest premarket U.S. stock moves today

• Starbucks (NASDAQ:) Shares rose 2.7% after The Wall Street Journal reported that activist investor Starboard Value has acquired a stake in the coffee giant and is demanding that the company take steps to improve its stock price.

• Pfizer (NYSE:) The stock rose 0.3% after the pharmaceutical giant announced that its Abrysvo vaccine against respiratory syncytial virus (RSV) elicited a strong immune response in a late-stage study of adults with weakened immune systems.

• Hawaiian Electrics (NYSE:) Shares fell 10% after the utility company raised doubts about its ability to continue as a going concern late last week after disclosing that it had no financing plan for the $1.99 billion settlement related to the Maui wildfires it agreed to earlier this month.

• Robinhood (NASDAQ:) The stock rose 1.4% after brokerage Piper Sandler upgraded its rating on the trading platform to “overweight” from “neutral,” viewing the recent decline as a buying opportunity.

• KeyCorp (NYSE:) Shares rose 15% following a minority investment by Bank of Nova Scotia, with the deal valued at around $2.8 billion and representing a pro forma 14.9% stake in KeyCorp common stock.

• Marathon Digital (NASDAQ:) The stock fell 3.9% after the cryptocurrency miner announced plans to issue $250 million in convertible bonds.

• Trump Media & Technology (NASDAQ:) The stock lost 0.7% after Elon Musk was scheduled to interview Donald Trump on Monday on the social media site “X,” a competitor to the Republican presidential candidate’s social media site “Truth Social.”