Morning Movers: Masimo surges, Danaher slumps after $9.9B deal

Stock futures are generally trading lower, reflecting renewed concerns about artificial intelligence-related disruption after last week’s weakness in tech and software stocks. Markets are broadly softer and tilted toward risk-off sentiment as stocks reopen following the long Presidents’ Day weekend. 

Beyond the U.S., European markets have managed to hold up somewhat better, with indexes like the STOXX 600 trading modestly higher as investors balance geopolitical developments with sector-specific earnings strength across areas such as healthcare and utilities. In Asia, markets that were open during the U.S. holiday session showed mixed moves as well, with Indian benchmarks sliding modestly and broader flows influenced by global risk signals.

In pre-market trading, S&P 500 futures fell 0.44%, Nasdaq futures fell 0.87% and Dow futures fell 0.25%.

Check out this morning’s top movers from around Wall Street, compiled by The Fly. 

HIGHER –

• Masimo (MASI) up 35% after entering into a definitive agreement pursuant to which Danaher (DHR) will acquire Masimo for $180.00 per share in cash, representing a total consideration of $9.9B
• ZIM Integrated (ZIM) up 35% after announcing a merger agreement, under which Hapag-Lloyd will acquire the company for $35.00 per share in cash
• Norwegian Cruise Line (NCLH) up 7% after WSJ reported activist investor Elliot has built an over 10% stake in the company
• Fiserv (FISV) up 3% after The Wall Street Journal reported activist investor Jana Partners has built a stake
• Warner Bros. Discovery (WBD) up 2% after announcing that Netflix (NFLX) has provideda limited waiver under the terms of Warner Bros. Discovery’s merger agreement, permitting the company to engage in discussions with Paramount Skydance (PSKY) for a seven-day period ending on February 23 to seek clarity and provide Paramount the ability to make its best and final offer

UP AFTER EARNINGS –

• Labcorp (LH) up 1%

DOWN AFTER EARNINGS –

• Leidos (LDOS) down 3%
• Medtronic (MDT) down 2%

LOWER –

• Danaher (DHR) down 6% after entering into a definitive agreement to acquire Masimo
• General Mills (GIS) down 3% after cutting its FY26 outlook ahead of the company’s CAGNY update