Starbucks, Robinhood, KeyCorp stock rise premarket; Hawaiian Electric falls

Investing.com -- U.S. stock futures edged higher Monday, in calm trading at the start of the week that includes the release of the latest consumer prices data.

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

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

• Pfizer (NYSE:PFE) stock rose 0.3% after the drugs giant said its respiratory syncytial virus (RSV) vaccine Abrysvo generated a strong immune response in a late-stage study of adults with a compromised immune system.

• Hawaiian Electric (NYSE:HE) stock slumped 10% after the utility firm raised "going concern" doubts late last week, in the wake of disclosing that it did not have a financing plan in place for the $1.99 billion Maui wildfire settlement it reached earlier this month.

• Robinhood (NASDAQ:HOOD) stock rose 1.4% after brokerage Piper Sandler upgraded its stance on the trading platform to ‘overweight’ from ‘neutral’, seeing the recent pullback as a buying opportunity.

• KeyCorp (NYSE:KEY) stock soared 15% after a minority investment by The Bank of Nova Scotia, with the deal valued at around $2.8 billion representing a 14.9% pro forma ownership in KeyCorp's common stock.

• Marathon Digital (NASDAQ:MARA) stock fell 3.9% after the cryptocurrency miner announced plans for a $250 million convertible debt offering.

• Trump Media & Technology (NASDAQ:DJT) stock slipped 0.7% after Elon Musk is set to interview Donald Trump Monday on the social media site X, a rival to the Republican presidential candidate’s own social media site Truth Social.